记录用户使用的是cookie,先写个cookie操作的类

在之前我曾经发个两个帖子说明登录验证问题，这里我再讲讲如何记录下登录的用户。如果不记录下用户会有很多问题，例如刷新。

一个基于wcf ria的简单登录方式

http://bbs.silverlightchina.net/ ... 1&fromuid=45530

以及

WCF RIA 登录验证升级版

http://bbs.silverlightchina.net/ ... 2&fromuid=45530

记录用户我使用的是cookie,先写个cookie操作的类。

cookie.cs

在mainpage.cs中加入

public MainPage()
        {
            InitializeComponent();
            //验证是否已经登录？读cookie
          if(cookie.excits("username",_username) //进入用户仪表盘
          else //留在登录页面
          }
//登录按钮点击后
private void button1_Click(object sender, RoutedEventArgs e)
        {
           
            myds.checklogin(login1.textBox1.Text,login1.passwordBox1.Password, (xx) =>
                {
                    if (xx.Value)
                    {
                        //登录成功后的处理，显示其他控件，隐藏登录控件
                        login1.Visibility = Visibility.Collapsed;
                        logout.Visibility = Visibility.Visible;//显示退出控件
                        
                        //写cookie
                        cookie.Write("username", login1.textBox1.Text, -1);//永久保留cookie
                        
                    }
                    else login1.textBlock3.Text = "用户名或者密码错误";
                }, null);
        }

//退出按钮点击，返回登录页面，清空cookie
private void button2_Click(object sender, RoutedEventArgs e)
        {
            //清除cookie
            logout.Visibility = Visibility.Collapsed;
            login1.Visibility = Visibility.Visible;
            login1.textBox1.Text = "";
            login1.passwordBox1.Password = "";
            cookie.Delete("username");
                    }

public class cookie
    {
        //是否存在
        public static bool Exists(string key, string value)        
        {            
            return HtmlPage.Document.Cookies.Contains(key + "=" + value);        
        }
        //读
        public static string Read(string key)        
        {            
            string[] cookies = HtmlPage.Document.Cookies.Split(';');            
            foreach (string cookie in cookies)            
            {                
                string[] keyValuePair = cookie.Split('=');                
                if (keyValuePair.Length == 2 && key == keyValuePair[0].Trim())                    
                    return keyValuePair[1].Trim();            
            }             return null;        
        } 
        //写
        public static void Write(string key, string value, int expireDays)        
        {            
            // expireDays = 0, 浏览器进程             
            // expireDays = -1, 永久保留            
            // expireDays = n, 保留n天            
            string expires = "";            
            if (expireDays != 0)            
            {                
                DateTime expireDate = (expireDays > 0 ?                
                    DateTime.Now + TimeSpan.FromDays(expireDays) :                
                    DateTime.MaxValue);                
                expires = ";expires=" + expireDate.ToString("R");            
            }             string cookie = key + "=" + value + expires;            
            HtmlPage.Document.SetProperty("cookie", cookie);        
        }         
        
        //删
        public static void Delete(string key)        
        {            
            DateTime expireDate = DateTime.Now - TimeSpan.FromDays(1); 
            // yesterday            
            string expires = ";expires=" + expireDate.ToString("R");            
            string cookie = key + "=" + expires;            
            HtmlPage.Document.SetProperty("cookie", cookie);        
        }
 

记录用户 使用的是cookie,先写个cookie操作的类

WCF RIA 登录验证+cookie之完整登录验证加保留用户状态

记录用户使用的是cookie,先写个cookie操作的类