SqlBulkCopy的用法

SqlBuck:

protected   void  Button1_Click( object  sender, EventArgs e)
    {
         string  strOle  =   string .Empty;
        strOle  =   " provider=Microsoft.ACE.OLEDB.12.0;Data Source= "   +  Server.MapPath( " ~/Files/copy.xlsx " )  +   " ;Extended Properties='Excel 12.0 Xml;HDR=YES;IMEX=1' " ;
         string  SrcConString;
         string  DesConString;
        OleDbConnection SrcCon  =   new  OleDbConnection();
        SqlConnection DesCon  =   new  SqlConnection();
        OleDbCommand SrcCom  =   new  OleDbCommand();
        OleDbDataAdapter SrcAdapter  =   new  OleDbDataAdapter();
        DataTable dt  =   new  DataTable();
        SrcConString  =  strOle;
         // ConfigurationManager.ConnectionStrings["SrcDBConnectionString"].ConnectionString;
        DesConString  =
        ConfigurationManager.ConnectionStrings[ " connstr " ].ConnectionString;
        SrcCon.ConnectionString  =  SrcConString;
        SrcCom.Connection  =  SrcCon;
        SrcCom.CommandText  =   "  SELECT * From [Sheet1$] " ;
        SrcCom.CommandType  =  CommandType.Text;
        SrcCom.Connection.Open();
        SrcAdapter.SelectCommand  =  SrcCom;
        SrcAdapter.Fill(dt);
        DataColumn dc  =   new  DataColumn( " Flag " ,  typeof ( string ));
        dc.DefaultValue  =   " True " ;
        dt.Columns.Add(dc);
        dt.AcceptChanges();
        SqlBulkCopy DesBulkOp;
        DesBulkOp  =   new  SqlBulkCopy(DesConString,
        SqlBulkCopyOptions.UseInternalTransaction);

        DesBulkOp.BulkCopyTimeout  =   500000000 ;
        DesBulkOp.SqlRowsCopied  +=
         new  SqlRowsCopiedEventHandler(OnRowsCopied);
        DesBulkOp.NotifyAfter  =  dt.Rows.Count;
         try
        {
            DesBulkOp.DestinationTableName  =   " My_Orders " ;
            DesBulkOp.WriteToServer(dt);
        }
         catch  (Exception ex)
        {
            Response.Write(ex.Message);
        }
         finally
        {
            SrcCon.Close();
            DesCon.Close();
        }
    }

     private   void  OnRowsCopied( object  sender, SqlRowsCopiedEventArgs args)
    {
        Response.Write(args.RowsCopied.ToString()  +   "  rows are copied<Br> " );
    }