用SqlDataReader返回多个结果集

 using System;
 using System.Data;
 using System.Data.SqlClient;

 namespace Northwind
 {
 class Program
 {
 static void Main(string[] args)
 {
 SqlConnection sqlConn = null;
 SqlCommand sqlCmd = null;
 SqlDataReader sqlDR = null;
 try
 {
 //创建连接对象,使用集成安全方式连接，更安全
 sqlConn = new SqlConnection(@"data source=localhost;
 Integrated Security=SSPI;Initial Catalog=northwind");
 //创建命令对象，参数1是存储过程名
 string strSql = @"select categoryid, categoryname from categories;"
 + @"select employeeId, lastname from employees";
 sqlCmd = new SqlCommand(strSql, sqlConn);

 //打开数据库
 sqlConn.Open();
 //执行查询，并将结果集返回给SqlDataReader
 sqlDR = sqlCmd.ExecuteReader();

 //遍历所有的行，直到结束
 do
 {
 Console.WriteLine(@"-------------------------------");
 Console.WriteLine("{0, -15}{1,-15}", sqlDR.GetName(),
 sqlDR.GetName());
 Console.WriteLine(@"-------------------------------");
 while (sqlDR.Read())
 {
 Console.WriteLine("{0, -15}${1,-15}", sqlDR.GetInt32(),
 sqlDR.GetString());
 }
 Console.WriteLine();

 } while (sqlDR.NextResult());

 }
 catch (System.Exception e)
 {
 Console.WriteLine(e.Message);
 }
 finally
 {
 //关闭SqlDataReader对象
 sqlDR.Close();
 //断开数据库连接
 sqlConn.Close();
 }

 }
 }
 }