使用DataReader的NextResult !

     数据库访问的对象DataReader，包括SqlDataReader,OleDbDataReader等有个NextResult方法，返回一个布尔值，true。鼠标指到NextResult代码上显示这些东东：Advances the data reader to the next result , when reading the results of batch Transact-SQL statement . ：）下面是个简单的例子。  

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace UseReader
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            SqlConnection cnn = new SqlConnection("data source=(local);initial catalog=tempdb;integrated security=sspi");
            SqlCommand cmd = new SqlCommand("select status,displayname from mytable1;select * from mytable2", cnn);
            SqlDataReader reader = null;
            try
            {
                cnn.Open();
                reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                while (reader.Read())
                {
                    listBox1.Items.Add(reader["displayname"]);
                }
                if (reader.NextResult())
                {
                    while (reader.Read())
                    {
                        listBox2.Items.Add(reader["age"]);
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                reader.Close();
            }
        }
    }
}

看了这篇文章你就不用每条select语句占用一个command了。^_^