一次性插入上万条数据的写法
1.
- /// <summary>
- /// DataTable批量添加(有事务)
- /// </summary> /
- // <param name="Table">数据源</param>
- /// <param name="Mapping">定义数据源和目标源列的关系集合</param>
- /// <param name="DestinationTableName">目标表</param>
- public static bool MySqlBulkCopy(DataTable Table, SqlBulkCopyColumnMapping[] Mapping, string DestinationTableName) {
- bool Bool = true;
- using (SqlConnection con = new SqlConnection(ConnectionString)) {
- con.Open();
- using (SqlTransaction Tran = con.BeginTransaction()) {
- using (SqlBulkCopy Copy = new SqlBulkCopy(con,SqlBulkCopyOptions.KeepIdentity,Tran)) {
- Copy.DestinationTableName = DestinationTableName;//指定目标表
- if (Mapping != null) { //如果有数据
- foreach (SqlBulkCopyColumnMapping Map in Mapping) {
- Copy.ColumnMappings.Add(Map); } }
- try { Copy.WriteToServer(Table);//批量添加
- Tran.Commit();//提交事务 }
- catch { Tran.Rollback();
- //回滚事务 Bool = false; } } } }
- return Bool; }
2.MSSQL使用SqlBulkCopy,传数据源,表名,列影射,我导入150万几秒完成
- /// <summary>
- /// 使用SqlBulkCopy批量插入,只限SQLServer
- /// 缺点,没有返回行数
- /// </summary>
- /// <param name="table">填充的DataTable,支持其它数据源,请看重载</param>
- /// <param name="tableName">数据库对应表名</param>
- /// <param name="columns">插入表对应的列名集合</param>
- public void SqlBulkCopyInsert(DataTable table, string tableName, string[] columns)
- {
- SqlBulkCopy sbc = new SqlBulkCopy("接连字符串");
- sbc.DestinationTableName = tableName;
- foreach (string col in columns)
- {
- sbc.ColumnMappings.Add(col, col);
- }
- sbc.WriteToServer(table);
- }
3.其它数据库,将数据查到一个datatable,往table填充数据,再在adpt.Update(table)
- /// <summary>
- /// 多行插入,Connection/Command/DataAdapter看你连接的数据库类型
- /// 进行相应的替换即可
- /// </summary>
- /// <param name="ds">填充数据后的数据集</param>
- /// <returns>受影响行数</returns>
- public int MultyInsert(DataSet ds)
- {
- int result = 0;
- IDbConnection con = new OracleConnection("连接字符串");
- con.Open();
- IDbCommand cmd = new OracleCommand();
- cmd.CommandText = "Insert into Member(UserName,Password) values(@name,@password)";
- IDbDataParameter namePar = cmd.CreateParameter();
- namePar.ParameterName = "@name";
- namePar.SourceColumn = "UserName";
- namePar.SourceVersion = DataRowVersion.Original;
- namePar.DbType = DbType.String;
- cmd.Parameters.Add(namePar);
- IDbDataParameter passPar = cmd.CreateParameter();
- passPar.ParameterName = "@pass";
- passPar.DbType = DbType.String;
- passPar.SourceColumn = "Password";
- passPar.SourceVersion = DataRowVersion.Original;
- cmd.Parameters.Add(passPar);
- IDbDataAdapter adpt = new OracleDataAdapter();
- adpt.InsertCommand = cmd;
- try
- {
- result = adpt.Update(ds);
- }
- catch (Exception)
- {
- throw;
- }
- finally
- {
- con.Close();
- }
- return result;
- }