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快速插入大量数据的asp.net代码(Sqlserver)

WBOY
WBOYOriginal
2016-06-07 18:01:49912browse

目标数据库只能是Sqlserver 来源数据库 无所谓 只要能用ado.net 将来源数据读取到Dataset或者Datareader 中就可以了。

代码如下:
using System.Data;
using System.Diagnostics;
using System.Data.SqlClient;
   
string connectionString = "Data Source=HG-J3EJJ9LSW5PY;Initial Catalog=Test;User ID=sa;password=hg";
DataTable dataTable = sql_.select_datagrid(" select a from large where 1=0 ").Tables[0];
string passportKey;
for (int i = 0; i {
passportKey = Guid.NewGuid().ToString();
DataRow dataRow = dataTable.NewRow();
dataRow[0] = passportKey;
dataTable.Rows.Add(dataRow);
}
SqlConnection sqlConnection = new SqlConnection(connectionString);
sqlConnection.Open();
SqlTransaction sqltran = sqlConnection.BeginTransaction();
SqlBulkCopy sqlBulkCopy = new SqlBulkCopy(sqlConnection, SqlBulkCopyOptions.KeepIdentity, sqltran);
sqlBulkCopy.DestinationTableName = "large";
sqlBulkCopy.BatchSize = dataTable.Rows.Count;
if (dataTable != null && dataTable.Rows.Count != 0)
{
sqlBulkCopy.WriteToServer(dataTable);
}
sqlBulkCopy.Close();
sqltran.Rollback();
sqlConnection.Close();

注解: sqlBulkCopy.DestinationTableName = "large"; large 指的是目标表的名称
DataTable 的结构要和数据库中的表的结构相同
(DataTable的列不能多于数据库里面的)
(DataTable的列可以少于数据库里面的 如果数据库这一列有默认值的话)
这里面 我使用了事务 您在使用的时候 也可以不用事务
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