ado.net 修改，查询

修改：

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

namespace 修改
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("请输入要修改的成员姓名：");
            string name = Console.ReadLine();
            Console.Write("请输入要修改的成员的生日：");
            string bir = Console.ReadLine();

            //创建数据库连接类
            SqlConnection conn = new SqlConnection("server=.;database=Data1128;user=sa;pwd=123;");//编写连接字符串

            //创建数据库操作类,创建过程是与刚创建的连接对象匹配起来
            SqlCommand comm = conn.CreateCommand();
            //编写操作语句 TSQL语句
            comm.CommandText="update Users set birthday='"+bir+"' where usename='"+name+"'";

            conn.Open();
            int i = comm.ExecuteNonQuery();
            conn.Close();
            if (i > )
                Console.WriteLine("修改成功！");
            else
                Console.WriteLine("修改失败！");
            Console.ReadKey();

        }
    }
}

查询：

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建数据库连接类
            SqlConnection con = new SqlConnection("server=.;database=Data1128;user=sa;pwd=123;");

            //创建数据库操作类,创建过程是与刚创建的连接对象匹配起来
            SqlCommand com = con.CreateCommand();
            //编写操作语句 TSQL语句
            com.CommandText = "select code,usename,password,nick,sex,nation,class,(select nationname from Nation where nationcode=Users.nation) as 民族,(select classname from Class where classcode=Users.class) as 班级,birthday from Users";//
            con.Open();
            //读取操作，返回读取器对象
            SqlDataReader dr= com.ExecuteReader();
            if (dr.HasRows)//获取一个bool值，判断是否含有一行或多行
            {
                while (dr.Read())//获取一个bool值，前进到下一条记录
                {
                    Console.WriteLine(dr["code"] + "\t" + dr["usename"] + "\t" + dr["password"] + "\t" + dr["nick"] + "\t" + (Convert.ToBoolean(dr["sex"]) ? "男" : "女") + "\t" + dr["民族"] + "\t" + dr["班级"] + "\t" + (Convert.ToDateTime(dr["birthday"]).ToShortDateString()));
                }
            }

            con.Close();
            Console.ReadLine();

        }
    }
}