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(0),
sqlDR.GetName(1));
Console.WriteLine(@"-------------------------------");
while (sqlDR.Read())
{
Console.WriteLine("{0, -15}${1,-15}", sqlDR.GetInt32(0),
sqlDR.GetString(1));
}
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();
}

}
}
}