using(SqlConnection conn = new SqlConnection(str))
       {
  conn.Open();   
using (System.Data.SqlClient.SqlBulkCopy sqlBC = new System.Data.SqlClient.SqlBulkCopy(conn))   {   sqlBC.BatchSize = 10000;// 每次提交的数量级
            sqlBC.BulkCopyTimeout = 60;   sqlBC.DestinationTableName = "dbo.Table1";//需要插入的表名   sqlBC.ColumnMappings.Add("ColumnName1OfDt", "Field1OfTable1");
                  sqlBC.ColumnMappings.Add("ColumnName2OfDt", "Field2OfTable1");
  sqlBC.WriteToServer(dt);
//自定义的 datatable   }   conn.Dispose();
       }

 

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