SqlBulkCopy大数据复制插入数据

public partial class ASP_NET : System.Web.UI.Page
{
    private DateTime startTime;
	string connString = "";//数据库连接

    protected void Button1_Click(object sender, EventArgs e)
    {
        startTime = DateTime.Now;
        SqlConnection srcConnection = new SqlConnection();
		srcConnection.ConnectionString = connString;
		
        SqlCommand sqlcmd = new SqlCommand();                   
        sqlcmd.Connection = srcConnection;
        sqlcmd.CommandText = "select * from abc"; //将这个表的数据复制到"bcd"表中
        sqlcmd.CommandType = CommandType.Text;
        sqlcmd.Connection.Open();
		
		DataTable dt = new DataTable(); 
		SqlDataAdapter da = new SqlDataAdapter();   
        da.SelectCommand = sqlcmd;	 
        da.Fill(dt);

        SqlBulkCopy sbc = new SqlBulkCopy(connString,SqlBulkCopyOptions.UseInternalTransaction); //支持事物
        sbc.BulkCopyTimeout = 5000;
        sbc.SqlRowsCopied +=new SqlRowsCopiedEventHandler(OnRowsCopied);
        sbc.NotifyAfter = dt.Rows.Count;
        try
        {
            sbc.DestinationTableName = "bcd";
            sbc.WriteToServer(dt); //开始复制数据
        }
        catch (Exception ex)
        {
            lblCounter.Text = ex.Message.ToString();
        }
        finally
        {
            sqlcmd.Clone();
            srcConnection.Close();
        }
    }
	
	//复制完成,响应事件
    private void OnRowsCopied(object sender, SqlRowsCopiedEventArgs args)
    {
        lblCounter.Text += args.RowsCopied.ToString() + " rows are copied<Br>";
        TimeSpan copyTime = DateTime.Now - startTime;
        lblCounter.Text += "Copy Time:" + copyTime.Seconds.ToString() + "." + copyTime.Milliseconds.ToString() + " seconds";
    }
}