C#数据库应用入门

using System;
using System.Data.SqlClient;

namespace AdoTest
{
    class ado
    {
        static void Main(string[] args)
        {
            String connectionString = @"server=标哥-PC\SQLEXPRESS2005;database=student;uid=sa;pwd=tianshi520";
            SqlConnection sqlConn = new SqlConnection(connectionString);//创建Connection对象
            SqlCommand sqlCmd = sqlConn.CreateCommand();//创建Command对象
            string commandString = "select sno, sname from s";//SQL命令语句
            sqlCmd.CommandText = commandString;//
            sqlConn.Open();//打开数据库

            SqlDataReader sqlDR = sqlCmd.ExecuteReader();//获取读取对象
            sqlDR.Read();//读取一行记录
            Console.WriteLine("Sno: " + sqlDR["Sno"]);//读取学号
            Console.WriteLine("Sname: " + sqlDR["Sname"]);//读取姓名

            sqlDR.Close(); //关闭记录集
            sqlConn.Close(); //断开数据库连接
        }
    }
}