当向mysql中插入大量数据时，可以使用微软的批处理方式。这样可以防止内存溢出又提高了效率。我写了一个mysql中插入多条记录的例子。赋值代码可以直接使用。
1、首先需要添加两个dll
MySql.Data.dll和MySqlBulkCopy.dll
2、把MySqlHelper.cs这个类文件加入到项目中 （我把代码贴出来，复制后建一个MySqlHelper.cs）
MySqlHelper.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; using System.Collections;
using System.Data;
using MySql.Data.MySqlClient; namespace Baitour.Utility
{
/// <summary>
/// The MySqlHelper class is intended to encapsulate high performance, scalable best practices for
/// common uses of MySqlClient.
/// </summary>
public sealed class MySqlHelper
{
#region private utility methods & constructors //Since this class provides only static methods, make the default constructor private to prevent
//instances from being created with "new MySqlHelper()". public static readonly string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["MySqlConnString"]; private MySqlHelper() { } /// <summary>
/// This method is used to attach array's of MySqlParameters to an MySqlCommand.
///
/// This method will assign a value of DbNull to any parameter with a direction of
/// InputOutput and a value of null.
///
/// This behavior will prevent default values from being used, but
/// this will be the less common case than an intended pure output parameter (derived as InputOutput)
/// where the user provided no input value.
/// </summary>
/// <param name="command">The command to which the parameters will be added</param>
/// <param name="commandParameters">an array of MySqlParameters tho be added to command</param>
private static void AttachParameters(MySqlCommand command, MySqlParameter[] commandParameters)
{
foreach (MySqlParameter p in commandParameters)
{
//check for derived output value with no value assigned
if ((p.Direction == ParameterDirection.InputOutput) && (p.Value == null))
{
p.Value = DBNull.Value;
} command.Parameters.Add(p);
}
} /// <summary>
/// This method assigns an array of values to an array of MySqlParameters.
/// </summary>
/// <param name="commandParameters">array of MySqlParameters to be assigned values</param>
/// <param name="parameterValues">array of objects holding the values to be assigned</param>
private static void AssignParameterValues(MySqlParameter[] commandParameters, object[] parameterValues)
{
if ((commandParameters == null) || (parameterValues == null))
{
//do nothing if we get no data
return;
} // we must have the same number of values as we pave parameters to put them in
if (commandParameters.Length != parameterValues.Length)
{
throw new ArgumentException("Parameter count does not match Parameter Value count.");
} //iterate through the MySqlParameters, assigning the values from the corresponding position in the
//value array
for (int i = 0, j = commandParameters.Length; i < j; i++)
{
commandParameters[i].Value = parameterValues[i];
}
} /// <summary>
/// This method opens (if necessary) and assigns a connection, transaction, command type and parameters
/// to the provided command.
/// </summary>
/// <param name="command">the MySqlCommand to be prepared</param>
/// <param name="connection">a valid MySqlConnection, on which to execute this command</param>
/// <param name="transaction">a valid MySqlTransaction, or 'null'</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParameters to be associated with the command or 'null' if no parameters are required</param>
private static void PrepareCommand(MySqlCommand command, MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, MySqlParameter[] commandParameters)
{
//if the provided connection is not open, we will open it
if (connection.State != ConnectionState.Open)
{
connection.Open();
} //associate the connection with the command
command.Connection = connection; //set the command text (stored procedure name or MySql statement)
command.CommandText = commandText; //honyu添加
//command.CommandTimeout = connection.ConnectionTimeout;
command.CommandTimeout = 300;//超时时间5分钟 //if we were provided a transaction, assign it.
if (transaction != null)
{
command.Transaction = transaction;
} //set the command type
command.CommandType = commandType; //attach the command parameters if they are provided
if (commandParameters != null)
{
AttachParameters(command, commandParameters);
} return;
} #endregion private utility methods & constructors #region ExecuteNonQuery /// <summary>
/// Execute an MySqlCommand (that returns no resultset and takes no parameters) against the database specified in
/// the connection string.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");
/// </remarks>
/// <param name="connectionString">a valid connection string for an MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteNonQuery(connectionString, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute an MySqlCommand (that returns no resultset) against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParameters used to execute the command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create & open an MySqlConnection, and dispose of it after we are done.
using (MySqlConnection cn = new MySqlConnection(connectionString))
{
cn.Open(); //call the overload that takes a connection in place of the connection string
return ExecuteNonQuery(cn, commandType, commandText, commandParameters);
}
} /// <summary>
/// Execute a stored procedure via an MySqlCommand (that returns no resultset) against the database specified in
/// the connection string using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);
/// </remarks>
/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
}
} /// <summary>
/// Execute an MySqlDbCommand (that returns no resultset and takes no parameters) against the provided MySqlConnection.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(MySqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteNonQuery(connection, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute an MySqlCommand (that returns no resultset) against the specified MySqlConnection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create a command and prepare it for execution
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters); //finally, execute the command.
return cmd.ExecuteNonQuery();
} /// <summary>
/// Execute a stored procedure via an MySqlCommand (that returns no resultset) against the specified MySqlConnection
/// using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(MySqlConnection connection, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
}
} /// <summary>
/// Execute an MySqlCommand (that returns no resultset and takes no parameters) against the provided MySqlTransaction.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(MySqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteNonQuery(transaction, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute an MySqlCommand (that returns no resultset) against the specified MySqlTransaction
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create a command and prepare it for execution
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //finally, execute the command.
return cmd.ExecuteNonQuery();
} /// <summary>
/// Execute a stored procedure via an MySqlCommand (that returns no resultset) against the specified
/// MySqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="spName">the name of the stored procedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(MySqlTransaction transaction, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populet the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
}
} #endregion ExecuteNonQuery #region ExecuteDataSet /// <summary>
/// Execute an MySqlCommand (that returns a resultset and takes no parameters) against the database specified in
/// the connection string.
/// </summary>
/// <remarks>
/// e.g.:
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connectionString">a valid connection string for an MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <returns>a dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset( CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteDataset(ConnectionString, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset) against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for an MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
/// <returns>a dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create & open an MySqlConnection, and dispose of it after we are done.
using (MySqlConnection cn = new MySqlConnection(connectionString))
{
cn.Open(); //call the overload that takes a connection in place of the connection string
return ExecuteDataset(cn, commandType, commandText, commandParameters);
}
} /// <summary>
/// Execute a stored procedure via an MySqlCommand (that returns a resultset) against the database specified in
/// the conneciton string using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connectionString">a valid connection string for an MySqlConnection</param>
/// <param name="spName">the name of the stored procedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>a dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset(string connectionString, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populet the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
}
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlConnection.
/// </summary>
/// <remarks>
/// e.g.:
/// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <returns>a dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset(MySqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteDataset(connection, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset) against the specified MySqlConnection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
/// <returns>a dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create a command and prepare it for execution
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters); //create the DataAdapter & DataSet
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
DataSet ds = new DataSet(); //fill the DataSet using default values for DataTable names, etc.
da.Fill(ds); //return the dataset
return ds;
} /// <summary>
/// Execute a stored procedure via an MySqlCommand (that returns a resultset) against the specified MySqlConnection
/// using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>a dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset(MySqlConnection connection, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteDataset(connection, CommandType.StoredProcedure, spName);
}
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlTransaction.
/// </summary>
/// <remarks>
/// e.g.:
/// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <returns>a dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset(MySqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteDataset(transaction, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset) against the specified MySqlTransaction
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
/// <returns>a dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create a command and prepare it for execution
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //create the DataAdapter & DataSet
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
DataSet ds = new DataSet(); //fill the DataSet using default values for DataTable names, etc.
da.Fill(ds); //return the dataset
return ds;
} /// <summary>
/// Execute a stored procedure via an MySqlCommand (that returns a resultset) against the specified
/// MySqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36);
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>a dataset containing the resultset generated by the command</returns>
public static DataSet ExecuteDataset(MySqlTransaction transaction, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
}
} #endregion ExecuteDataSet #region ExecuteReader /// <summary>
/// this enum is used to indicate weather the connection was provided by the caller, or created by MySqlHelper, so that
/// we can set the appropriate CommandBehavior when calling ExecuteReader()
/// </summary>
private enum MySqlConnectionOwnership
{
/// <summary>Connection is owned and managed by MySqlHelper</summary>
Internal,
/// <summary>Connection is owned and managed by the caller</summary>
External
} /// <summary>
/// Create and prepare an MySqlCommand, and call ExecuteReader with the appropriate CommandBehavior.
/// </summary>
/// <remarks>
/// If we created and opened the connection, we want the connection to be closed when the DataReader is closed.
///
/// If the caller provided the connection, we want to leave it to them to manage.
/// </remarks>
/// <param name="connection">a valid MySqlConnection, on which to execute this command</param>
/// <param name="transaction">a valid MySqlTransaction, or 'null'</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParameters to be associated with the command or 'null' if no parameters are required</param>
/// <param name="connectionOwnership">indicates whether the connection parameter was provided by the caller, or created by MySqlHelper</param>
/// <returns>MySqlDataReader containing the results of the command</returns>
private static MySqlDataReader ExecuteReader(MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, MySqlParameter[] commandParameters, MySqlConnectionOwnership connectionOwnership)
{
//create a command and prepare it for execution
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters); //create a reader
MySqlDataReader dr; // call ExecuteReader with the appropriate CommandBehavior
if (connectionOwnership == MySqlConnectionOwnership.External)
{
dr = cmd.ExecuteReader();
}
else
{
dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
} return dr;
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset and takes no parameters) against the database specified in
/// the connection string.
/// </summary>
/// <remarks>
/// e.g.:
/// MySqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connectionString">a valid connection string for an MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <returns>an MySqlDataReader containing the resultset generated by the command</returns>
public static MySqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteReader(connectionString, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset) against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// MySqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for an MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParameters used to execute the command</param>
/// <returns>an MySqlDataReader containing the resultset generated by the command</returns>
public static MySqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create & open an MySqlbConnection
MySqlConnection cn = new MySqlConnection(connectionString);
cn.Open(); try
{
//call the private overload that takes an internally owned connection in place of the connection string
return ExecuteReader(cn, null, commandType, commandText, commandParameters, MySqlConnectionOwnership.Internal);
}
catch
{
//if we fail to return the MySqlDataReader, we neeed to close the connection ourselves
cn.Close();
throw;
}
} /// <summary>
/// Execute a stored procedure via an MySqlCommand (that returns a resultset) against the database specified in
/// the connection string using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// MySqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connectionString">a valid connection string for an MySqlConnection</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>an MySqlDataReader containing the resultset generated by the command</returns>
public static MySqlDataReader ExecuteReader(string connectionString, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
}
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlConnection.
/// </summary>
/// <remarks>
/// e.g.:
/// MySqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <returns>an MySqlDataReader containing the resultset generated by the command</returns>
public static MySqlDataReader ExecuteReader(MySqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteReader(connection, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset) against the specified MySqlConnection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// MySqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
/// <returns>an MySqlDataReader containing the resultset generated by the command</returns>
public static MySqlDataReader ExecuteReader(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//pass through the call to the private overload using a null transaction value and an externally owned connection
return ExecuteReader(connection, (MySqlTransaction)null, commandType, commandText, commandParameters, MySqlConnectionOwnership.External);
} /// <summary>
/// Execute a stored procedure via an MySqlCommand (that returns a resultset) against the specified MySqlConnection
/// using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// MySqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="spName">the name of the stored procedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>an MySqlDataReader containing the resultset generated by the command</returns>
public static MySqlDataReader ExecuteReader(MySqlConnection connection, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName); AssignParameterValues(commandParameters, parameterValues); return ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteReader(connection, CommandType.StoredProcedure, spName);
}
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlTransaction.
/// </summary>
/// <remarks>
/// e.g.:
/// MySqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <returns>an MySqlDataReader containing the resultset generated by the command</returns>
public static MySqlDataReader ExecuteReader(MySqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteReader(transaction, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute an MySqlCommand (that returns a resultset) against the specified MySqlTransaction
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// MySqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of MySqlParameters used to execute the command</param>
/// <returns>an MySqlDataReader containing the resultset generated by the command</returns>
public static MySqlDataReader ExecuteReader(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//pass through to private overload, indicating that the connection is owned by the caller
return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, MySqlConnectionOwnership.External);
} /// <summary>
/// Execute a stored procedure via an MySqlCommand (that returns a resultset) against the specified
/// MySqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// MySqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36);
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>an MySqlDataReader containing the resultset generated by the command</returns>
public static MySqlDataReader ExecuteReader(MySqlTransaction transaction, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName); AssignParameterValues(commandParameters, parameterValues); return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteReader(transaction, CommandType.StoredProcedure, spName);
}
} #endregion ExecuteReader #region ExecuteScalar /// <summary>
/// Execute a MySqlCommand (that returns a 1x1 resultset and takes no parameters) against the database specified in
/// the connection string.
/// </summary>
/// <remarks>
/// e.g.:
/// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");
/// </remarks>
/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-MySql command</param>
/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteScalar(connectionString, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute a MySqlCommand (that returns a 1x1 resultset) against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-MySql command</param>
/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create & open a MySqlConnection, and dispose of it after we are done.
using (MySqlConnection cn = new MySqlConnection(connectionString))
{
cn.Open(); //call the overload that takes a connection in place of the connection string
return ExecuteScalar(cn, commandType, commandText, commandParameters);
}
} /// <summary>
/// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the database specified in
/// the conneciton string using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36);
/// </remarks>
/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
public static object ExecuteScalar(string connectionString, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populet the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
}
} /// <summary>
/// Execute a MySqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided MySqlConnection.
/// </summary>
/// <remarks>
/// e.g.:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-MySql command</param>
/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
public static object ExecuteScalar(MySqlConnection connection, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteScalar(connection, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlConnection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-MySql command</param>
/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
public static object ExecuteScalar(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create a command and prepare it for execution
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters); //execute the command & return the results
return cmd.ExecuteScalar();
} /// <summary>
/// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlConnection
/// using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36);
/// </remarks>
/// <param name="connection">a valid MySqlConnection</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
public static object ExecuteScalar(MySqlConnection connection, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populet the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteScalar(connection, CommandType.StoredProcedure, spName);
}
} /// <summary>
/// Execute a MySqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided MySqlTransaction.
/// </summary>
/// <remarks>
/// e.g.:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-MySql command</param>
/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
public static object ExecuteScalar(MySqlTransaction transaction, CommandType commandType, string commandText)
{
//pass through the call providing null for the set of MySqlParameters
return ExecuteScalar(transaction, commandType, commandText, (MySqlParameter[])null);
} /// <summary>
/// Execute a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlTransaction
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new MySqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-MySql command</param>
/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
public static object ExecuteScalar(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
{
//create a command and prepare it for execution
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //execute the command & return the results
return cmd.ExecuteScalar(); } /// <summary>
/// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the specified
/// MySqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the
/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
/// </summary>
/// <remarks>
/// This method provides no access to output parameters or the stored procedure's return value parameter.
///
/// e.g.:
/// int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36);
/// </remarks>
/// <param name="transaction">a valid MySqlTransaction</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
public static object ExecuteScalar(MySqlTransaction transaction, string spName, params object[] parameterValues)
{
//if we got parameter values, we need to figure out where they go
if ((parameterValues != null) && (parameterValues.Length > 0))
{
//pull the parameters for this stored procedure from the parameter cache (or discover them & populet the cache)
MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName); //assign the provided values to these parameters based on parameter order
AssignParameterValues(commandParameters, parameterValues); //call the overload that takes an array of MySqlParameters
return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
//otherwise we can just call the SP without params
else
{
return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
}
} #endregion ExecuteScalar
}
/// <summary>
/// MySqlHelperParameterCache provides functions to leverage a static cache of procedure parameters, and the
/// ability to discover parameters for stored procedures at run-time.
/// </summary>
public sealed class MySqlHelperParameterCache
{
#region private methods, variables, and constructors //Since this class provides only static methods, make the default constructor private to prevent
//instances from being created with "new MySqlHelperParameterCache()".
private MySqlHelperParameterCache() { } private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable()); /// <summary>
/// resolve at run-time the appropriate set of MySqlParameters for a stored procedure
/// </summary>
/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <param name="includeReturnValueParameter">weather or not to onclude ther return value parameter</param>
/// <returns></returns>
private static MySqlParameter[] DiscoverSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
{
using (MySqlConnection cn = new MySqlConnection(connectionString))
using (MySqlCommand cmd = new MySqlCommand(spName, cn))
{
cn.Open();
cmd.CommandType = CommandType.StoredProcedure; MySqlCommandBuilder.DeriveParameters(cmd); if (!includeReturnValueParameter)
{
if (ParameterDirection.ReturnValue == cmd.Parameters[0].Direction)
cmd.Parameters.RemoveAt(0);
} MySqlParameter[] discoveredParameters = new MySqlParameter[cmd.Parameters.Count]; cmd.Parameters.CopyTo(discoveredParameters, 0); return discoveredParameters;
}
} //deep copy of cached MySqlParameter array
private static MySqlParameter[] CloneParameters(MySqlParameter[] originalParameters)
{
MySqlParameter[] clonedParameters = new MySqlParameter[originalParameters.Length]; for (int i = 0, j = originalParameters.Length; i < j; i++)
{
clonedParameters[i] = (MySqlParameter)((ICloneable)originalParameters[i]).Clone();
} return clonedParameters;
} #endregion private methods, variables, and constructors #region caching functions /// <summary>
/// add parameter array to the cache
/// </summary>
/// <param name="connectionString">a valid connection string for an MySqlConnection</param>
/// <param name="commandText">the stored procedure name or T-MySql command</param>
/// <param name="commandParameters">an array of MySqlParamters to be cached</param>
public static void CacheParameterSet(string connectionString, string commandText, params MySqlParameter[] commandParameters)
{
string hashKey = connectionString + ":" + commandText; paramCache[hashKey] = commandParameters;
} /// <summary>
/// retrieve a parameter array from the cache
/// </summary>
/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
/// <param name="commandText">the stored procedure name or T-MySql command</param>
/// <returns>an array of MySqlParameters</returns>
public static MySqlParameter[] GetCachedParameterSet(string connectionString, string commandText)
{
string hashKey = connectionString + ":" + commandText; MySqlParameter[] cachedParameters = (MySqlParameter[])paramCache[hashKey]; if (cachedParameters == null)
{
return null;
}
else
{
return CloneParameters(cachedParameters);
}
} #endregion caching functions #region Parameter Discovery Functions /// <summary>
/// Retrieves the set of MySqlParameters appropriate for the stored procedure
/// </summary>
/// <remarks>
/// This method will query the database for this information, and then store it in a cache for future requests.
/// </remarks>
/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
/// <param name="spName">the name of the stored prcedure</param>
/// <returns>an array of MySqlParameters</returns>
public static MySqlParameter[] GetSpParameterSet(string connectionString, string spName)
{
return GetSpParameterSet(connectionString, spName, true);
} /// <summary>
/// Retrieves the set of MySqlParameters appropriate for the stored procedure
/// </summary>
/// <remarks>
/// This method will query the database for this information, and then store it in a cache for future requests.
/// </remarks>
/// <param name="connectionString">a valid connection string for an MySqlConnection</param>
/// <param name="spName">the name of the stored procedure</param>
/// <param name="includeReturnValueParameter">a bool value indicating weather the return value parameter should be included in the results</param>
/// <returns>an array of MySqlParameters</returns>
public static MySqlParameter[] GetSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
{
string hashKey = connectionString + ":" + spName + (includeReturnValueParameter ? ":include ReturnValue Parameter" : ""); MySqlParameter[] cachedParameters; cachedParameters = (MySqlParameter[])paramCache[hashKey]; if (cachedParameters == null)
{
cachedParameters = (MySqlParameter[])(paramCache[hashKey] = DiscoverSpParameterSet(connectionString, spName, includeReturnValueParameter));
} return CloneParameters(cachedParameters);
} #endregion Parameter Discovery Functions }
}
3、配置config字符串
<appSettings>
<add key="MySqlConnString" value="Data Source=192.168.2.98;User Id=root;Password=123456;Database=test2;CharSet=utf8;AllowUserVariables=True;" />
</appSettings>
4、程序里写代码
DataTable dt = new DataTable();
dt.Columns.Add("name", typeof(string));
for (int i = 0; i < 10; i++)
{
DataRow dr = dt.NewRow();
dr["name"] = "hh" + i.ToString();
dt.Rows.Add(dr);
} bool isExistValidFile = false;
StringBuilder ExternalIDs = new StringBuilder(); #region load data infile string filename = "";
if (System.Environment.CurrentDirectory + "\\" == AppDomain.CurrentDomain.BaseDirectory) { filename = AppDomain.CurrentDomain.BaseDirectory + Guid.NewGuid().ToString().ToUpper().Replace("-", "") + ".txt"; }
else { filename = AppDomain.CurrentDomain.BaseDirectory + @"Bin\" + Guid.NewGuid().ToString().ToUpper().Replace("-", "") + ".txt"; } using (System.IO.FileStream fs = new System.IO.FileStream(filename, System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.Read))
{
using (System.IO.StreamWriter sw = new System.IO.StreamWriter(fs, Encoding.Default))
{
foreach (DataRow drObj in dt.Rows)
{
sw.WriteLine(drObj["name"]);
isExistValidFile = true;
}
sw.Close();
}
fs.Close();
GC.Collect();
}
if (isExistValidFile)
{
if (System.IO.File.Exists(filename))
{
#region 提交数据库 StringBuilder loadDataSql = new StringBuilder();
loadDataSql.Append("LOAD DATA LOCAL INFILE '" + @filename.Replace("\\", "/") + "' INTO TABLE student CHARACTER SET GBK FIELDS TERMINATED BY '|' ");
loadDataSql.Append("(name)"); using (MySql.Data.MySqlClient.MySqlConnection con = new MySql.Data.MySqlClient.MySqlConnection(MySqlHelper.ConnectionString))
{
con.Open();
MySql.Data.MySqlClient.MySqlTransaction st = con.BeginTransaction(IsolationLevel.ReadUncommitted);
try
{
MySqlHelper.ExecuteNonQuery(st, CommandType.Text, loadDataSql.ToString());
st.Commit();
GC.Collect();
}
catch (Exception ex)
{
StringBuilder tmpError = new StringBuilder();
tmpError.Append(ex.TargetSite).Append("\r\n" + ex.StackTrace).Append("\r\n" + ex.InnerException).Append("\r\n" + ex.Source).Append("\r\n" + ex.Message);
st.Rollback();
}
finally { if (con != null) { con.Close(); con.Dispose(); } if (!string.IsNullOrEmpty(filename)) { System.IO.File.Delete(filename); } }
} #endregion
}
else { }
}
else { } #endregion