1.大批量數據操作

　　可以利用SqlBulkCopy類快速寫入大批量數據，針對SQL Server的優化，可以寫入DataRow數據，DataTable,DataReader

　　WriteToServer（DataTable）寫入數據表

　　WriteToServer（DataRow[]）批次寫入數據行

　　WriteToServer（DataTable ，DataRowState）按行狀態寫入數據庫表

　　WriteToServer（IDataReader）寫入DataReader對象

  string connstr = "server=(local);database=northwind;integrated security=true;async=true";
            // Fill up a DataSet
            DataSet ds = new DataSet();
            SqlConnection conn = new SqlConnection(connstr);
            SqlDataAdapter dadp = new SqlDataAdapter("select * from customers", conn);
            dadp.Fill(ds);
            // Copy the Data to SqlServer
            SqlBulkCopy bcp = new SqlBulkCopy(connstr);
            bcp.DestinationTableName = "customers1";
            bcp.WriteToServer(ds.Tables[0]);
　　2.多個動態的結果集

　　Multiple Active Result Sets（MARS）

　　這個只能在SQL Server 2005中使用

　　可以在一個Command對象上同時打開多個DataReader

 string connstr = "server=(local);database=northwind;integrated security=true;async=true";
            SqlConnection conn = new SqlConnection(connstr);
            conn.Open();
            SqlCommand cmd1 = new SqlCommand("select * from customers", conn);
            SqlCommand cmd2 = new SqlCommand("select * from orders", conn);
            SqlDataReader rdr1 = cmd1.ExecuteReader();
            // next statement causes an error PRior to SQL Server 2005
            SqlDataReader rdr2 = cmd2.ExecuteReader();
            // now you can reader from rdr1 and rdr2 at the same time.