有的时候做网站，就需要记住用户登录信息，下次再登录网站时，不用重复输入用户名和密码，原理是浏览器的cookie把状态给记住了！
那么具体是怎么实现的呢？下面博主将一部分代码贴出来，想要完整版的Demo可以到百度云和码云下载，
百度云下载链接：https://pan.baidu.com/s/1rfQNxpM8WGxkBbdiS1mLeQ 密码：if1q
马云下载链接：https://gitee.com/WuFengZui/RememberLoginDemo 【没有下载链接的都是耍流氓 哈哈！！】
咱们先来看看效果图：
下面是添加Cookie的代码，不过这个方法是我封装过的，方法中的具体操作可以查看第二段代码
???????????//创建Cookie【防止登录信息泄露，这里使用Encode()将信息进行了加密】 ???????????????SqlHelper.SetCookie("NameCookie", SqlHelper.Encode(UserName), DateTime.Now.AddDays(7)); ???????????????SqlHelper.SetCookie("PwdCookie", SqlHelper.Encode(Pwd), DateTime.Now.AddDays(7)); ???????????//获取Cookie ???????????????string name = SqlHelper.GetCookieValue("NameCookie"); ???????????????string pwd = SqlHelper.GetCookieValue("PwdCookie"); ???????????//删除Cookie ???????????SqlHelper.RemoveCookie("NameCookie"); ???????????SqlHelper.RemoveCookie("PwdCookie"); ???????封装添加Cookie方法
/// <summary> ???????/// 设置Cookie值和过期时间 ???????/// </summary> ???????/// <param name="cookieName">Cookie名称</param> ???????/// <param name="value">值</param> ???????/// <param name="expires">过期时间</param> ???????public static void SetCookie(string cookieName, string value, DateTime expires) ???????{ ???????????HttpCookie cookie = HttpContext.Current.Request.Cookies[cookieName]; ???????????if (cookie != null) ???????????{ ???????????????cookie.Value = value; ???????????????cookie.Expires = expires; ???????????????HttpContext.Current.Response.Cookies.Add(cookie); ???????????} ???????????else ???????????{ ???????????????cookie = new HttpCookie(cookieName); ???????????????cookie.Value = value; ???????????????cookie.Expires = expires; ???????????????HttpContext.Current.Response.Cookies.Add(cookie); ???????????} ???????}封装获取Cookie方法
/// <summary> ???????/// 获得Cookie的值 ???????/// </summary> ???????/// <param name="cookieName">Cookie名称</param> ???????/// <returns></returns> ???????public static string GetCookieValue(string cookieName) ???????{ ???????????HttpCookie cookie = HttpContext.Current.Request.Cookies[cookieName]; ???????????if (cookie == null) ???????????????return ""; ???????????else ???????????????return cookie.Value; ???????}封装删除Cookie方法
/// <summary> ???????/// 删除Cookie的值 ???????/// </summary> ???????/// <param name="cookieName">Cookie名称</param> ???????/// <returns></returns> ???????public static void RemoveCookie(string cookieName) ???????{ ???????????SetCookie(cookieName, "", DateTime.Now.AddDays(1)); ???????}好了 上面是用到的主要代码 有需要完整Demo的请去文章开头给的链接下载 祝大家早日成为大牛 成为一个自己仰慕的人！
Asp.Net MVC记住用户登录信息 ?下次登录无需输入密码
原文地址：https://www.cnblogs.com/liujieblogs/p/9634169.html