ASP.NET web 网上注册及投票

还是老师惹的祸~~~

设计和实现一个简单的网上注册系统和投票系统。要求注册页面中用户可以输入用户名、密码、性别、年龄、等信息；登录成功后利用application对象实现优秀班干部评选的功能。

新建web应用程序：

右键单击解决方案添加新项 web窗体：

接下来就在设计视图中拖控件（一直按着左键拖动）

建表：

create table users (name varchar(20) not null,password varchar(20) not null,sex varchar(3),age int);

充分利用 asax文件：

相关代码：

login.aspx.cs:

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

using System.Data.SqlClient;
namespace _8_1
{
    public partial class login : System.Web.UI.Page
    {
        string str = @"Data Source=localhost\SQLEXPRESS;Initial Catalog=master;Integrated Security=True";
        protected void Button2_Click(object sender, EventArgs e)
        {   //跳转页面
            Response.Redirect("register.aspx");
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            try
            {
                SqlConnection conn = new SqlConnection(str);
                SqlCommand com = new SqlCommand();
                com.Connection = conn;
                com.CommandText = string.Format("select * from users where name='{0}' and password='{1}'",
                   TextBox1.Text, TextBox2.Text);

                conn.Open();
                int n = com.ExecuteNonQuery();
                if (n > 0)
                {
                    MsgBox("OK", "login.aspx");
                    conn.Close();
                    Response.Redirect("vote.aspx");
                }
                else
                {
                    MsgBox("不存在记录", "login.aspx");
                    conn.Close();
                   //Response.Redirect("vote.aspx");
                }

            }
            catch (Exception ex)
            {
                MsgBox(ex.ToString(), "login.aspx");
            }
        }   
       //消息提示函数
        public void MsgBox(string strMsg, string URL)
        {
            System.Web.HttpContext.Current.Response.Write(strMsg);
        } 
    }
}

register.aspx.cs:

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

using System.Data.SqlClient;
namespace _8_1
{
    public partial class register : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        string str = @"Data Source=localhost\SQLEXPRESS;Initial Catalog=master;Integrated Security=True";
        protected void Button1_Click(object sender, EventArgs e)
        {
            try{
                SqlConnection conn = new SqlConnection(str);
                SqlCommand com = new SqlCommand();
                com.Connection = conn;
                com.CommandText = string.Format("insert into users (name,password,sex,age)values('{0}','{1}','{2}',{3})",
                   TextBox1.Text, TextBox2.Text, TextBox3.Text, int.Parse(TextBox4.Text));

                conn.Open();
                int n = com.ExecuteNonQuery();
                if (n > 0)
                {
                    MsgBox("注册成功。", "register.aspx");
                }
                conn.Close();
                Response.Redirect("login.aspx"); //暂时不知道怎么设置跳转时间
            }
            catch(Exception ex){
                MsgBox(ex.ToString(), "register.aspx");
            }

        }  
        //构造web提示框
        public void MsgBox(string strMsg, string URL)
        {
            System.Web.HttpContext.Current.Response.Write(strMsg);
        } 

    }
}

vote.aspx.cs:

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

namespace _8_1
{
    public partial class vote : System.Web.UI.Page
    {
        protected void Button1_Click(object sender, EventArgs e)
        {   //使用application
            int n=(int)Application["Elena"];
            Application["Elena"] = n + 1;
            Button1.Text = Application["Elena"].ToString();
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            int n = (int)Application["Demon"];
            Application["Demon"] = n + 1;
            Button2.Text = Application["Demon"].ToString();
        }

        protected void Button3_Click(object sender, EventArgs e)
        {
            int n = (int)Application["Stephen"];
            Application["Stephen"] = n + 1;
            Button3.Text = Application["Stephen"].ToString();
        }
    }
}

Global.asax.cs:

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

namespace _8_1
{
    public class Global : System.Web.HttpApplication
    {

        protected void Application_Start(object sender, EventArgs e)
        {
            Application["Elena"] = 0;
            Application["Demon"] = 0;
            Application["Stephen"] = 0;
        }

        protected void Session_Start(object sender, EventArgs e)
        {

        }

        protected void Application_BeginRequest(object sender, EventArgs e)
        {

        }

        protected void Application_AuthenticateRequest(object sender, EventArgs e)
        {

        }

        protected void Application_Error(object sender, EventArgs e)
        {

        }

        protected void Session_End(object sender, EventArgs e)
        {

        }

        protected void Application_End(object sender, EventArgs e)
        {

        }
    }
}

登录页面：

注册页面：

投票界面：