C#初入门

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace SqlConn
{
    class Program
    {
        static void Main(string[] args)
        {
            string strConnectionString =
                 @"server=localhost;database=StudentInfo;uid=sa;pwd=tianshi520";
            SqlConnection sqlConn = new SqlConnection(strConnectionString);
            string strSql = "select * from student";
            SqlCommand sqlCmd = new SqlCommand(strSql, sqlConn);
            if (sqlConn.State == ConnectionState.Open)
            {
                sqlConn.Close();
            }
            sqlConn.Open();
            SqlDataReader sqlDataReader = sqlCmd.ExecuteReader();
            do 
            {
                while (sqlDataReader.Read())
                    Console.WriteLine("{0}\t{1}\t{2}\t{3}\t{4}", sqlDataReader["Sno"],                            sqlDataReader["Sname"], sqlDataReader["Ssex"],                                        sqlDataReader["Sage"], sqlDataReader.GetString(4));
            } while (sqlDataReader.NextResult());
            
            sqlDataReader.Close();
            sqlConn.Close();
        }
    }
}