登录，注册页面练习

数据库：

create database aspnet
go

use aspnet
go


create table Umz
(
   Umzz nvarchar(20) primary key,--民族代号，主键
   Ummz nvarchar(20)--民族
)
insert into Umz values('M1','汉族')
insert into Umz values('M2','回族')
insert into Umz values('M3','壮族')
insert into Umz values('M4','满族')
insert into Umz values('M5','傣族')



create table Utb
(
   Ucode nvarchar(20),--账号
   Umima nvarchar(20),--密码
   Uname nvarchar(20),--名字
   Usex bit,--性别
   Ubirth datetime,--生日
   Uminzu nvarchar(20)--民族,外键
)
insert into Utb values('S101','123','周杰棍','1','1990-3-5','M1')
insert into Utb values('S102','123','双杰伦','1','1991-4-5','M2')
insert into Utb values('S103','123','杨幂','0','1992-5-5','M3')
insert into Utb values('S104','123','静香','0','1993-6-5','M4')
insert into Utb values('S105','123','查理','1','1994-7-5','M5')

数据库实体类：

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

/// <summary>
/// User 的摘要说明
/// </summary>
public class User
{
    SqlConnection conn = null;
    SqlCommand cmd = null;
    public User()
    {
        conn = new SqlConnection("server=.;database=aspnet;user=sa;pwd=123;");
        cmd = conn.CreateCommand();
    }


    //封装一个用户信息的实体类
    private string _Ucode;//账号

    public string Ucode
    {
        get { return _Ucode; }
        set { _Ucode = value; }
    }


    private string _Umima;//密码

    public string Umima
    {
        get { return _Umima; }
        set { _Umima = value; }
    }
    private string _Uname;//姓名

    public string Uname
    {
        get { return _Uname; }
        set { _Uname = value; }
    }
    private bool _Usex;//性别

    public bool Usex
    {
        get { return _Usex; }
        set { _Usex = value; }
    }
    public string sex //扩展字段
    {
        get { return Usex ? "男" : "女"; }
    }
    private DateTime _Ubirth;//生日

    public DateTime Ubirth
    {
        get { return _Ubirth; }
        set { _Ubirth = value; }
    }
    //public string birthday
    //{
    //    get { return Ubirth.ToString("yyyy年MM月dd日"); }
    //}

    private string _Uminzu;//民族

    public string Uminzu
    {
        get { return _Uminzu; }
        set { _Uminzu = value; }
    }
    /// <summary>
    /// 民族字段扩展
    /// </summary>
    public string Minzu
    {
        get
        {
            string Mz = "";
            cmd.CommandText = "select Ummz from Umz where Umzz=@Umzz";
            cmd.Parameters.Clear();
            cmd.Parameters.Add("@Umzz", _Uminzu);
            conn.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            if (dr.HasRows)
            {
                dr.Read();
                Mz = dr["Ummz"].ToString();
            }
            conn.Close();
            return Mz;
        }
    }

}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// Minzu 的摘要说明
/// </summary>
public class Minzu
{
    public Minzu()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }
    public string Umzz { get; set; }
    public string Ummz { get; set; }
}

数据库操作类：

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

/// <summary>
/// UserData 的摘要说明
/// </summary>
public class UserData
{
    SqlConnection conn = null;
    SqlCommand cmd = null;
    public UserData()
    {
        conn = new SqlConnection("server=.;database=aspnet;user=sa;pwd=123;");
        cmd = conn.CreateCommand();
    }


    /// <summary>
    /// 验证登录输入是否有此信息
    /// </summary>
    /// <param name="zh"></param>
    /// <param name="mm"></param>
    /// <returns></returns>
    public bool Denglu(string zh, string mm)
    {
        bool isok = false;
        cmd.CommandText = "select * from Utb where Ucode=@Ucode and Umima=@Umima";
        cmd.Parameters.Clear();
        cmd.Parameters.Add("Ucode", zh);
        cmd.Parameters.Add("Umima", mm);
        conn.Open();
        SqlDataReader dr = cmd.ExecuteReader();
        if (dr.HasRows)
        {
            isok = true;
        }
        conn.Close();

        return isok;
    }


    /// <summary>
    /// 查询用户所有信息
    /// </summary>
    /// <returns></returns>
    public List<User> selectAll()
    {
        List<User> list = new List<User>();
        cmd.CommandText = "select * from Utb";
        conn.Open();
        SqlDataReader dr = cmd.ExecuteReader();
        if (dr.HasRows)
        {
            while (dr.Read())
            {
                User us = new User();
                us.Ucode = dr["Ucode"].ToString();
                us.Umima = dr["Umima"].ToString();
                us.Uname = dr["Uname"].ToString();
                us.Usex = Convert.ToBoolean(dr["Usex"]);
                us.Ubirth = Convert.ToDateTime(dr["Ubirth"]);
                us.Uminzu = dr["Uminzu"].ToString();

                list.Add(us);
            }
        }
        conn.Close();
        return list;
    }


    /// <summary>
    /// 根据每个人的主键值删除个人信息
    /// </summary>
    /// <param name="code"></param>
    public bool delete(string code)
    {
        bool isok = false;

        cmd.CommandText = "delete from Utb where Ucode=@code";
        cmd.Parameters.Clear();
        cmd.Parameters.Add("@code", code);
        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
            isok = true;
        }
        catch
        {
            isok = false;
        }
        finally { conn.Close(); }
        return isok;
    }


    /// <summary>
    /// 根据修改按钮传过来的主键值将要修改的用户信息查出来
    /// </summary>
    /// <param name="code"></param>
    /// <returns></returns>
    public User selectall(string code)
    {
        User us = new User();
        cmd.CommandText = "select * from Utb where Ucode=@a";
        cmd.Parameters.Clear();
        cmd.Parameters.Add("@a", code);
        conn.Open();
        SqlDataReader dr = cmd.ExecuteReader();
        if (dr.HasRows)
        {
            dr.Read();
            us.Ucode = dr["Ucode"].ToString();
            us.Umima = dr["Umima"].ToString();
            us.Uname = dr["Uname"].ToString();
            us.Usex = Convert.ToBoolean(dr["Usex"]);
            us.Ubirth = Convert.ToDateTime(dr["Ubirth"]);
            us.Uminzu = dr["Uminzu"].ToString();
        }
        conn.Close();
        return us;
    }


    /// <summary>
    /// 修改用户信息
    /// </summary>
    /// <param name="ser"></param>
    /// <returns></returns>
    public bool Update(User ser) 
    {
        bool isok = false;
        cmd.CommandText = "update Utb set Umima=@mima,Uname=@name,Usex=@sex,Ubirth=@birth,Uminzu=@minzu where Ucode=@code ";
        cmd.Parameters.Clear();
        cmd.Parameters.Add("@code", ser.Ucode);
        cmd.Parameters.Add("@mima", ser.Umima);
        cmd.Parameters.Add("@name", ser.Uname);
        cmd.Parameters.Add("@sex", ser.Usex);
        cmd.Parameters.Add("@birth", ser.Ubirth);
        cmd.Parameters.Add("@minzu", ser.Uminzu);

        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
            isok = true;
        }
        catch { }
        finally
        {
            conn.Close();
        }
        return isok;
    }



    /// <summary>
    /// 用户注册，添加用户信息
    /// </summary>
    /// <param name="ser"></param>
    /// <returns></returns>
    public bool Insert(User ser) 
    {
        bool isok = false;
        cmd.CommandText = "insert into Utb values(@code,@mima,@name,@sex,@birth,@minzu) ";
        cmd.Parameters.Clear();
        cmd.Parameters.Add("@code", ser.Ucode);
        cmd.Parameters.Add("@mima", ser.Umima);
        cmd.Parameters.Add("@name", ser.Uname);
        cmd.Parameters.Add("@sex", ser.Usex);
        cmd.Parameters.Add("@birth", ser.Ubirth);
        cmd.Parameters.Add("@minzu", ser.Uminzu);
        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
            isok = true;
        }
        catch { }
        finally 
        {
            conn.Close();
        }
        return isok;
    }
}

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

/// <summary>
/// MinzuData 的摘要说明
/// </summary>
public class MinzuData
{
    SqlConnection conn = null;
    SqlCommand cmd = null;
    public MinzuData()
    {
        conn = new SqlConnection("server=.;database=aspnet;user=sa;pwd=123;");
        cmd = conn.CreateCommand();
    }

    public List<Minzu> selectl() 
    {
        List<Minzu> li = new List<Minzu>();
        cmd.CommandText = "select * from Umz";
        conn.Open();
        SqlDataReader dr = cmd.ExecuteReader();
        if (dr.HasRows) 
        {
            while (dr.Read())
            {
                Minzu mc = new Minzu();
                mc.Umzz = dr["Umzz"].ToString();
                mc.Ummz = dr["Ummz"].ToString();
                li.Add(mc);
            }
        }
        conn.Close();
        return li;
    }
}

登录界面：

前台：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Denglu.aspx.cs" Inherits="Denglu" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <style type="text/css">
        body {
            background-image: url(images/dlbj.jpg);
            background-size: cover;
        }

        #Dz {
            position: relative;
            width: 500px;
            height: 400px;
            top: 50px;
            left: 10%;
            /*background-color:#3f8bf5;*/
            background-image: url(images/Dbj.jpg);
            background-size: cover;
        }

        #Dz1 {
            position: relative;
            height: 20%;
            /*background-color:#698df2;*/
            text-align: center;
        }

            #Dz1 span {
                position: relative;
                top: 15%;
                font-family: 黑体;
                font-size: 45px;
                font-weight: 600;
                color:#050f81;
            }

        #Dz2 {
            position: relative;
            height: 30%;
            /*background-color:#cba4a4;*/
            text-align: center;
        }

            #Dz2 span {
                position: relative;
                top: 40%;
                font-family: 宋体;
                font-size: 30px;
                font-weight: 600;
            }

        #TextBox1 {
            position: relative;
            top: 35%;
            height: 30px;
            width: 180px;
            border: 2px solid;
        }

        #Dz3 {
            position: relative;
            height: 30%;
            /*background-color:#ff6a00;*/
            text-align: center;
        }

            #Dz3 span {
                position: relative;
                top: 20px;
                font-family: 宋体;
                font-size: 30px;
                font-weight: 600;
            }

        #TextBox2 {
            position: relative;
            top: 15px;
            height: 30px;
            width: 180px;
            border: 2px solid;
        }

        .Check {
            position: relative;
            top: 30px;
        }

        #Dz4 {
            position: relative;
            height: 20%;
            /*background-color:#b6ff00;*/
            text-align:center;
        }
        .but {
        position:relative;
        top:30px;
        width:80px;
        height:30px;
        font-family:微软雅黑;
        font-size:20px;
        background-color:#ef2424;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
        <div id="Dz">
            <div id="Dz1"><span>用&nbsp;户&nbsp;登&nbsp;录</span></div>
            <div id="Dz2">
                <span>账号：</span><asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            </div>
            <div id="Dz3">
                <span>密码：</span><asp:TextBox ID="TextBox2" runat="server" TextMode="Password"></asp:TextBox>
                <div class="Check">
                    <asp:CheckBox ID="CheckBox1" Text="7天自动登录" runat="server" /></div>
            </div>
            <div id="Dz4">
                <asp:Button ID="Button1" CssClass="but" runat="server" Text="登 录" />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                <asp:Button ID="Button2" CssClass="but" runat="server" Text="注 册" />
            </div>
        </div>
    </form>
</body>
</html>

后台：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Denglu : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Button1.Click += Button1_Click;
        Button2.Click += Button2_Click;
        if (Session["good"] != null)
        {
            bool hasok = Convert.ToBoolean(Session["good"]);
            if (hasok)
            {
                Response.Write("<script>alert('注册成功！');</script>");
            }
            else
            {
                Response.Write("<script>alert('注册失败！');</script>");
            }
            Session["good"] = null;
        }
    }

    
    //登录按钮点击事件
    void Button1_Click(object sender, EventArgs e)
    {
        string zh=TextBox1.Text;
        string mm=TextBox2.Text;
        bool isok = new UserData().Denglu(zh, mm);
        if (isok == false)
        {
            TextBox1.Text = "此账号不存在";
        }
        else 
        {
            Response.Cookies["code"].Value = TextBox1.Text;
            if (CheckBox1.Checked) 
            {
                Response.Cookies["code"].Expires = DateTime.Now.AddDays(7);   
            }
            Response.Redirect("Zhujiemian.aspx");
            Response.Write("<script>window.close();</script>");
        }
    }
    //注册按钮点击事件
    void Button2_Click(object sender, EventArgs e)
    {
        Response.Redirect("Zhuce.aspx");
        Response.Write("<script>window.close();</script>");
    }
}

注册界面：

前台：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Zhuce.aspx.cs" Inherits="Zhuce" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
<style type="text/css">
        * {
            margin: 0px;
            padding: 0px;
        }

        #Bj {
            position: relative;
            width: 100%;
            height: 660px;
            background-image:url(images/asas.jpg);
            background-size:cover;
        }

        #Zck {
            position: relative;
            width: 600px;
            height: 500px;
            top: 12%;
            left: 28%;
            background-color: #FFF68F;
        }

        #Bt {
            position: relative;
            width: 100%;
            height: 80px;
            text-align: center;
            background-color: #32CD32;
            background-image:url(images/bt.png);
        }

        #Bt_name {
            position: relative;
            top: 15px;
            font-family: 微软雅黑;
            font-size: 35px;
            font-weight:600;
            color: white;
            letter-spacing: 25px; /*字符间距*/
        }

        #Ym {
            position: relative;
            width: 100%;
            height: 360px;
            background-image:url(images/vipbgimg.jpg);
            background-size:cover;
        }

        #Ym_1 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #8470FF;*/
            text-align: center;
        }

            #Ym_1 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
            }

        #TextBox1 {
            position: relative;
            height: 25px;
            width: 180px;
            top: 5px;
        }

        #Ym_2 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #00CD66;*/
            text-align: center;
        }

            #Ym_2 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
            }

        #TextBox2 {
            position: relative;
            height: 25px;
            width: 180px;
            top: 5px;
        }

        #Ym_3 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #7B68EE;*/
            text-align: center;
        }

            #Ym_3 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
            }

        #TextBox3 {
            position: relative;
            height: 25px;
            width: 180px;
            top: 5px;
        }

        #Ym_4 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #00EE76;*/
        }

            #Ym_4 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
                left: 170px;
            }

            #Ym_4 div {
                position: relative;
                bottom: 10px;
                left: 255px;
            }

        #Ym_5 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #6A5ACD;*/
            text-align: center;
        }

            #Ym_5 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
            }
        #DropDownList2 {
        position:relative;
        height:20px;
        top:8px;
        }
        #DropDownList3 {
        position:relative;
        height:20px;
        top:8px;}
        #DropDownList4 {
        position:relative;
        height:20px;
        top:8px;}

        #Ym_6 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #8470FF;*/
            text-align: center;
        }

            #Ym_6 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
            }

        #DropDownList1 {
            position: relative;
            height: 25px;
            width: 183px;
            top: 5px;
        }

        #Dl {
            position: relative;
            width: 100%;
            height: 60px;
            background-image:url(images/Diwen.png);
            /*background-color: #FFFF00;*/
        }

        #Button1 {
            position: relative;
            width: 80px;
            height: 30px;
            top: 15px;
            left: 150px;
            font-family:微软雅黑;
            font-size:16px;
        }

        #Button2 {
            position: relative;
            width: 80px;
            height: 30px;
            top: 15px;
            left: 300px;
            font-family:微软雅黑;
            font-size:16px;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
        <div id="Bj">
            <div id="Zck">
                <div id="Bt"><span id="Bt_name">用户注册</span></div>
                <div id="Ym">
                    <div id="Ym_1"><span>账号：</span>&nbsp;<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox></div>
                    <div id="Ym_2"><span>密码：</span>&nbsp;<asp:TextBox ID="TextBox2" runat="server" TextMode="Password"></asp:TextBox></div>
                    <div id="Ym_3"><span>姓名：</span>&nbsp;<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox></div>
                    <div id="Ym_4">
                        <span>性别：</span>
                        <div>
                            <asp:RadioButton ID="RadioButton1" runat="server" GroupName="1"  Text="男" />&nbsp;&nbsp;
                            <asp:RadioButton ID="RadioButton2" runat="server" GroupName="1" Text="女" />
                        </div>
                    </div>
                    <div id="Ym_5">
                        <span>生日：</span><asp:DropDownList ID="DropDownList2" runat="server"></asp:DropDownList><span>年</span><asp:DropDownList ID="DropDownList3" runat="server"></asp:DropDownList><span>月</span><asp:DropDownList ID="DropDownList4" runat="server"></asp:DropDownList><span>日</span>
                    </div>
                    <div id="Ym_6">
                        <span>民族：</span>&nbsp;<asp:DropDownList ID="DropDownList1" runat="server">
                            
                        </asp:DropDownList>
                    </div>
                </div>
                <div id="Dl">
                    <asp:Button ID="Button1" runat="server" Text="提  交" />
                    <asp:Button ID="Button2" runat="server" Text="取  消" />
                </div>
            </div>
        </div>
    </form>
</body>
</html>

后台：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Zhuce : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Button1.Click += Button1_Click;
        Button2.Click += Button2_Click;
        if (IsPostBack == false)
        {
            BindDropDown();
            BingDD();
        }
    }

    


    //提交按钮点击事件
    void Button1_Click(object sender, EventArgs e)
    {
        User ur = new User();
        ur.Ucode = TextBox1.Text;
        ur.Umima = TextBox2.Text;
        ur.Uname = TextBox3.Text;
        if (RadioButton1.Checked == true)
        {
            ur.Usex = true;
        }
        else
        {
            ur.Usex = false;
        }
        ur.Ubirth = Convert.ToDateTime(DropDownList2.Text + "-" + DropDownList3.Text + "-" + DropDownList4.Text);
        ur.Uminzu = DropDownList1.SelectedItem.Value;

        bool isok = new UserData().Insert(ur);
        if (isok)
        {
            Session["good"] = isok;
            Response.Redirect("Denglu.aspx");
            Response.Write("<script>window.close();</script>");
        }

    }

    //取消按钮点击事件
    void Button2_Click(object sender, EventArgs e)
    {
        Response.Redirect("Denglu.aspx");
        Response.Write("<script>window.close();</script>");
    }






    /// <summary>
    /// 生日下拉列表信息
    /// </summary>
    public void BindDropDown()
    {
        for (int i = 1990; i <= DateTime.Now.Year; i++) //年的下拉列表
        {
            ListItem li = new ListItem(i.ToString(), i.ToString());
            DropDownList2.Items.Add(li);
        }
        for (int i = 1; i <= 12; i++)//月的下拉列表
        {
            ListItem li = new ListItem(i.ToString(), i.ToString());
            DropDownList3.Items.Add(li);
        }
        for (int i = 1; i <= 31; i++)//日的下拉列表
        {
            ListItem li = new ListItem(i.ToString(), i.ToString());
            DropDownList4.Items.Add(li);
        }
    }

    /// <summary>
    /// 民族的下拉列表信息
    /// </summary>
    public void BingDD()
    {
        DropDownList1.DataSource = new MinzuData().selectl();
        DropDownList1.DataTextField = "Ummz";
        DropDownList1.DataValueField = "Umzz";
        DropDownList1.DataBind();
    }
}

主界面显示数据表格及修改删除功能：

前台：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Zhujiemian.aspx.cs" Inherits="Zhujiemian" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <style type="text/css">
        body {
            background-image: url(images/ssa.jpg);
            background-size: cover;
        }

        #Bt {
            
            height:70px;
            text-align:center;
        }

        #Bt1 {
            position: relative;
            font-family: 宋体;
            font-size: 35px;
            font-weight: 600;
            top: 20px;
        }

        #Tab {
            width: 100%;
            background-color: #0e1075;
        }

            #Tab tr {
                height: 50px;
            }

        #S1 {
            text-align: center;
            font-family: 微软雅黑;
            font-size: 20px;
            color: white;
        }

        #L1 {
            width: 10%;
        }

        #L2 {
            width: 10%;
        }

        #L3 {
            width: 10%;
        }

        #L4 {
            width: 10%;
        }

        #L5 {
            width: 30%;
        }

        #L6 {
            width: 10%;
        }

        #S2 {
            text-align: center;
            font-family: 微软雅黑;
            font-size: 18px;
            background-color: white;
        }

        #S3 {
            text-align: center;
            font-family: 微软雅黑;
            font-size: 18px;
            background-color: #dbd4d4;
        }
    </style>
</head>
<body>
    <div id="Bt">
        
        <span id="Bt1">用&nbsp;户&nbsp;登&nbsp;录&nbsp;主&nbsp;界&nbsp;面</span>
    </div>
    <form id="form1" runat="server">
        <span>当前登录用户：<asp:Label ID="Label1" runat="server" Text="未选择"></asp:Label></span>&nbsp;
        <asp:LinkButton ID="LinkButton1" runat="server">注销</asp:LinkButton>
        <asp:Repeater ID="Repeater1" runat="server">
            <HeaderTemplate>
                <table id="Tab">
                    <tr id="S1">
                        <td id="L1">账号</td>
                        <td id="L2">密码</td>
                        <td id="L3">姓名</td>
                        <td id="L4">性别</td>
                        <td id="L5">生日</td>
                        <td id="L6">民族</td>
                        <td>操作</td>
                    </tr>
            </HeaderTemplate>
            <ItemTemplate>
                <tr id="S2">
                    <td><%#Eval("Ucode") %></td>
                    <td><%#Eval("Umima") %></td>
                    <td><%#Eval("Uname") %></td>
                    <td><%#Eval("sex") %></td>
                    <td><%#Eval("Ubirth","{0:yyyy年MM月dd日}") %></td>
                    <td><%#Eval("Minzu") %></td>
                    <td><a href="Update.aspx?aaa=<%#Eval("Ucode") %>" target="_blank">修改</a>&nbsp;&nbsp;&nbsp;&nbsp;<a href="Delete.aspx?aaa=<%#Eval("Ucode") %>">删除</a></td>
                </tr>
            </ItemTemplate>
            <AlternatingItemTemplate>
                <tr id="S3">
                    <td><%#Eval("Ucode") %></td>
                    <td><%#Eval("Umima") %></td>
                    <td><%#Eval("Uname") %></td>
                    <td><%#Eval("sex") %></td>
                    <td><%#Eval("Ubirth","{0:yyyy年MM月dd日}") %></td>
                    <td><%#Eval("Minzu") %></td>
                    <td><a href="Update.aspx?aaa=<%#Eval("Ucode") %>" target="_blank">修改</a>&nbsp;&nbsp;&nbsp;&nbsp;<a href="Delete.aspx?aaa=<%#Eval("Ucode") %>">删除</a></td>
                </tr>
            </AlternatingItemTemplate>
            <FooterTemplate>
                </table>
            </FooterTemplate>
        </asp:Repeater>
        <asp:LinkButton ID="LinkButton2" runat="server">返回登录页面</asp:LinkButton>
    </form>
</body>
</html>

后台：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Zhujiemian : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        LinkButton1.Click += LinkButton1_Click;
        LinkButton2.Click += LinkButton2_Click;
        if (Request.Cookies["code"] != null)
        {
            Label1.Text = Request.Cookies["code"].Value;
        }
        else 
        {
            Label1.Text = "未选择"; 
        }
        
        if (Session["has"] != null)
        {
            bool hasok = Convert.ToBoolean(Session["has"]);
            if (hasok)
            {
                Response.Write("<script>alert('删除成功！');</script>");
            }
            else
            {
                Response.Write("<script>alert('删除失败！');</script>");
            }
            Session["has"] = null;
        }
        
        if (Session["ok"] != null)
        {
            bool hasok = Convert.ToBoolean(Session["ok"]);
            if (hasok)
            {
                Response.Write("<script>alert('修改成功！');</script>");
            }
            else
            {
                Response.Write("<script>alert('修改失败！');</script>");
            }
            Session["ok"] = null;
        }
        Bind();
    }

    


    //注销按钮点击事件
    void LinkButton1_Click(object sender, EventArgs e)
    {
        Response.Cookies["code"].Expires = DateTime.Now.AddDays(-2);
        Label1.Text = "未选择";
    }

    //返回按钮点击事件
    void LinkButton2_Click(object sender, EventArgs e)
    {
        Response.Redirect("Denglu.aspx");
    }



    /// <summary>
    /// 写一个绑定数据的方法
    /// </summary>
    public void Bind()
    {
        Repeater1.DataSource = new UserData().selectAll();
        Repeater1.DataBind();
    }
}

删除窗口后台：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Delete : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string code = Request["aaa"];
        bool isok = false;
        if (!string.IsNullOrEmpty(code)) 
        {
            isok = new UserData().delete(code);
        }
        Session["has"] = isok;
        Response.Redirect("Zhujiemian.aspx");
    }
}

修改窗口前台：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Update.aspx.cs" Inherits="Update" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
<style type="text/css">
        * {
            margin: 0px;
            padding: 0px;
        }

        #Bj {
            position: relative;
            width: 100%;
            height: 660px;
            background-image:url(images/asas.jpg);
            background-size:cover;
        }

        #Zck {
            position: relative;
            width: 600px;
            height: 500px;
            top: 12%;
            left: 28%;
            background-color: #FFF68F;
        }

        #Bt {
            position: relative;
            width: 100%;
            height: 80px;
            text-align: center;
            background-color: #32CD32;
            background-image:url(images/bt.png);
        }

        #Bt_name {
            position: relative;
            top: 15px;
            font-family: 微软雅黑;
            font-size: 35px;
            font-weight:600;
            color: white;
            letter-spacing: 25px; /*字符间距*/
        }

        #Ym {
            position: relative;
            width: 100%;
            height: 360px;
            background-image:url(images/vipbgimg.jpg);
            background-size:cover;
        }

        #Ym_1 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #8470FF;*/
            
        }

            #Ym_1 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
                left:175px;
            }

        #TextBox1 {
            position: relative;
            height: 25px;
            width: 180px;
            top: 5px;
        }

        #Ym_2 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #00CD66;*/
            text-align: center;
        }

            #Ym_2 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
            }

        #TextBox2 {
            position: relative;
            height: 25px;
            width: 180px;
            top: 5px;
        }

        #Ym_3 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #7B68EE;*/
            text-align: center;
        }

            #Ym_3 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
            }

        #TextBox3 {
            position: relative;
            height: 25px;
            width: 180px;
            top: 5px;
        }

        #Ym_4 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #00EE76;*/
        }

            #Ym_4 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
                left: 170px;
            }

            #Ym_4 div {
                position: relative;
                bottom: 10px;
                left: 255px;
            }

        #Ym_5 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #6A5ACD;*/
            text-align: center;
        }

            #Ym_5 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
            }
        #DropDownList2 {
        position:relative;
        height:20px;
        top:8px;
        }
        #DropDownList3 {
        position:relative;
        height:20px;
        top:8px;}
        #DropDownList4 {
        position:relative;
        height:20px;
        top:8px;}

        #Ym_6 {
            position: relative;
            width: 100%;
            height: 60px;
            /*background-color: #8470FF;*/
            text-align: center;
        }

            #Ym_6 span {
                position: relative;
                font-family: 微软雅黑;
                font-size: 20px;
                top: 10px;
            }

        #DropDownList1 {
            position: relative;
            height: 25px;
            width: 183px;
            top: 5px;
        }

        #Dl {
            position: relative;
            width: 100%;
            height: 60px;
            background-image:url(images/Diwen.png);
            /*background-color: #FFFF00;*/
        }

        #Button1 {
            position: relative;
            width: 80px;
            height: 30px;
            top: 15px;
            left: 150px;
            font-family:微软雅黑;
            font-size:16px;
        }

        #Button2 {
            position: relative;
            width: 80px;
            height: 30px;
            top: 15px;
            left: 300px;
            font-family:微软雅黑;
            font-size:16px;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
        <div id="Bj">
            <div id="Zck">
                <div id="Bt"><span id="Bt_name">用户修改</span></div>
                <div id="Ym">
                    <div id="Ym_1"><span>账号：</span>&nbsp;<asp:Label ID="Label1" runat="server" Text=""></asp:Label></div>
                    <div id="Ym_2"><span>密码：</span>&nbsp;<asp:TextBox ID="TextBox2" runat="server" TextMode="Password"></asp:TextBox></div>
                    <div id="Ym_3"><span>姓名：</span>&nbsp;<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox></div>
                    <div id="Ym_4">
                        <span>性别：</span>
                        <div>
                            <asp:RadioButton ID="RadioButton1" runat="server" GroupName="1"  Text="男" />&nbsp;&nbsp;
                            <asp:RadioButton ID="RadioButton2" runat="server" GroupName="1" Text="女" />
                        </div>
                    </div>
                    <div id="Ym_5">
                        <span>生日：</span><asp:DropDownList ID="DropDownList2" runat="server"></asp:DropDownList><span>年</span><asp:DropDownList ID="DropDownList3" runat="server"></asp:DropDownList><span>月</span><asp:DropDownList ID="DropDownList4" runat="server"></asp:DropDownList><span>日</span>
                    </div>
                    <div id="Ym_6">
                        <span>民族：</span>&nbsp;<asp:DropDownList ID="DropDownList1" runat="server">
                            
                        </asp:DropDownList>
                    </div>
                </div>
                <div id="Dl">
                    <asp:Button ID="Button1" runat="server" Text="提  交" />
                    <asp:Button ID="Button2" runat="server" Text="取  消" />
                </div>
            </div>
        </div>
    </form>
</body>
</html>

修改窗口后台：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Update : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Button1.Click += Button1_Click;
        Button2.Click += Button2_Click;
        string code = Request["aaa"];

        User us = new UserData().selectall(code);

        if (IsPostBack == false)
        {
            BindDropDown();
            BingDD();


            Label1.Text = us.Ucode;
            TextBox2.Text = us.Umima;
            TextBox3.Text = us.Uname;
            if (us.Usex)
            {
                RadioButton1.Checked = true;
            }
            else
            {
                RadioButton2.Checked = true;
            }
            DropDownList2.SelectedValue = us.Ubirth.Year.ToString();
            DropDownList3.SelectedValue = us.Ubirth.Month.ToString();
            DropDownList4.SelectedValue = us.Ubirth.Day.ToString();
            DropDownList1.SelectedValue = us.Uminzu;
        }  
    }

    


    //提交按钮点击事件
    void Button1_Click(object sender, EventArgs e)
    {
        User ur = new User();
        ur.Ucode = Label1.Text;
        ur.Umima = TextBox2.Text;
        ur.Uname = TextBox3.Text.Trim();
        if (RadioButton1.Checked == true)
        {
            ur.Usex = true;
        }
        else 
        {
            ur.Usex = false;
        }
        ur.Ubirth = Convert.ToDateTime(DropDownList2.Text + "-" + DropDownList3.Text + "-" + DropDownList4.Text);
        ur.Uminzu = DropDownList1.SelectedItem.Value;

        bool isok = new UserData().Update(ur);
        if (isok) 
        {
            Session["ok"] = isok;  
        }
        Response.Redirect("Zhujiemian.aspx");
        Response.Write("<script>window.close();</script>");
    }

    //取消按钮点击事件
    void Button2_Click(object sender, EventArgs e)
    {
        Response.Write("<script>window.close();</script>");
    }

    /// <summary>
    /// 生日下拉列表信息
    /// </summary>
    public void BindDropDown()
    {
        for (int i = 1990; i <= DateTime.Now.Year; i++) //年的下拉列表
        {
            ListItem li = new ListItem(i.ToString(), i.ToString());
            DropDownList2.Items.Add(li);
        }
        for (int i = 1; i <= 12; i++)//月的下拉列表
        {
            ListItem li = new ListItem(i.ToString(), i.ToString());
            DropDownList3.Items.Add(li);
        }
        for (int i = 1; i <= 31; i++)//日的下拉列表
        {
            ListItem li = new ListItem(i.ToString(), i.ToString());
            DropDownList4.Items.Add(li);
        }
    }

    /// <summary>
    /// 民族的下拉列表信息
    /// </summary>
    public void BingDD()
    {
        DropDownList1.DataSource = new MinzuData().selectl();
        DropDownList1.DataTextField = "Ummz";
        DropDownList1.DataValueField = "Umzz";
        DropDownList1.DataBind();
    }
}