参考文献:
前言:
之前写过一篇博客:Sql Server的JDBC测试程序与远程连接,现在来讲讲在.net 平台下如何连接sql server数据库。有多种方式可以连接数据库,分别是ODBC,OLEDB,ADO,ADO.NET。每一种连接所使用的驱动程序以及连接字符串都不相同,具体如何写数据库连接字符串可以参考这个网站http://www.connectionstrings.com/。上面列出了大多数数据源的数据库连接字符串。
ADO.NET
首先我们将如何使用ado.net来连接数据库,这也是使用最频繁的方法了。参考程序如下:
View Code
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data.SqlClient; namespace SQLServerConnection { class Program { static void Main(string[] args) { //默认实例 //string connectionString = "Data Source=SERVER_NAME;Initial Catalog=AdventureWorks2008R2;User ID=sa;Password=sa12345"; //命名实例 string connectionString = "Data Source=SERVER_NAME\\SQL2012;Initial Catalog=AdventureWorks2012;User Id=sa;Password=sa12345"; // Assumes connectionString is a valid connection string. using (SqlConnection connection = new SqlConnection(connectionString)) { //打开连接 connection.Open(); // Do work here. SqlCommand sqlcmd = connection.CreateCommand(); //sqlcmd.CommandText = "select top 10 * from Person.Person;"; sqlcmd.CommandText = "select top 10 * from Person;"; SqlDataReader sqlreader = sqlcmd.ExecuteReader(); while (sqlreader.Read()) { Console.WriteLine("\t{0}\t{1}",sqlreader["firstname"],sqlreader["lastname"]); } sqlreader.Close(); connection.Close();//因为使用了using,所以这一条语句可以不写,因为当离开using代码块以后,connection自动关闭 } } } }
常见的SQLClient连接字符串有:
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Integrated Security=Yes;Data Source=MyServer; Initial Catalog=MyDatabase; Data Source=ServerName ;User ID=UserName;Password=UserPassword; Data Source=ServerName\InstanceName;Integrated Security=Yes
之所以说是使用ADO.NET是因为使用了SqlConnection这个连接类
OLEDB
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data.OleDb; namespace OleConnection { class Program { static void Main(string[] args) { string connectionString = "Provider=SQLOLEDB;Data Source=T-WEIXU-W7\\SQL2012;Initial Catalog=AdventureWorks2012;Integrated Security=SSPI;"; // Assumes connectionString is a valid connection string. using (OleDbConnection connection = new OleDbConnection(connectionString)) { //打开连接 connection.Open(); // Do work here. OleDbCommand sqlcmd = connection.CreateCommand(); sqlcmd.CommandText = "select top 10 * from Person.Person;"; //sqlcmd.CommandText = "select top 10 * from Person;"; OleDbDataReader sqlreader = sqlcmd.ExecuteReader(); while (sqlreader.Read()) { Console.WriteLine("\t{0}\t{1}", sqlreader["firstname"], sqlreader["lastname"]); } sqlreader.Close(); connection.Close(); } } } }
下面是常见的OLEDB连接字符串:
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Provider=SQLOLEDB;Data Source=ServerName;Integrated Security=SSPI; Provider=SQLOLEDB;Data Source=ServerName;User Id=UserName;Pasword=UserPassword; Provider=SQLOLEDB;Data Source=ServerName\InstanceName;Integrated Security=SSPI; Provider=SQLNCLI11;Data Source=ServerName\InstanceName;Integrated Security=SSPI;
打开D:\Program Files (x86)\Microsoft Data Access SDK 2.8\Tools\x86\RowsetViewer.exe中可以查看本机的oledb驱动程序。我的机器上就有比如
- SQLOLEDB
- SQLNCLI10
- SQLNCLI11
这样的三类oledb驱动程序,