DotNet常用的Cookies操纵

最新推荐文章于 2019-11-05 23:45:15 发布

原创最新推荐文章于 2019-11-05 23:45:15 发布 · 797 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#cookies #email #user #null #string #java

DotNet 专栏收录该内容

10 篇文章

订阅专栏

本文介绍如何使用HttpCookie进行增删改查操作，包括创建、删除、更新Cookies及读取Cookies值的方法，并展示了如何延长Cookies的有效期。

//（增）创建一个Cookies
HttpCookie cookies = new HttpCookie("user");
cookies.Values.Add("userName", "Mickey");
cookies.Values.Add("email", "Mickey@java163.cn");
cookies.Expires = DateTime.Now.AddMilliseconds(5000); //失效时间=当前时间+5毫秒
Response.Cookies.Add(cookies);

//（删）删除一个Cookies
HttpCookie cookie = Request.Cookies["user"];
cookie.Expires = DateTime.Now.AddMilliseconds(-1); //设置过期时间为-1毫秒，浏览器下次访问时会自动删除此Cookies
Response.Cookies.Add(cookie);

//（改）修改Cookies的值（其实不可以直接修改，只能通过覆盖的方式来修改）
HttpCookie cookies = Request.Cookies["user"];
if (cookies != null)
{
    HttpCookie newCookies = HttpCookie("user");
    newCookies.Values.Add("userName", "Mini");
    newCookies.Values.Add("email", "Mini@java163.cn");
    newCookies.Expires = DateTime.Now.AddMilliseconds(5000); //失效时间=当前时间+5毫秒
    Response.Cookies.Add(newCookies);
}

//（查）获取一个Cookies
HttpCookie cookies = Request.Cookies["user"];
if (cookies != null)
{
    Response.Write("userName = " + cookies["userName"]);
    Response.Write("<br>");
    Response.Write("email = " + cookies["email"]);
}

//当前Cookies如果没有失效，则给当前Cookies增加生命周期
HttpCookie cookies = Request.Cookies["user"];
if (cookies != null)
{
cookies.Expires = DateTime.Now.AddMilliseconds(5000); //给当前Cookies增加5毫秒生命周期
Response.Cookies.Add(cookies);
}

//会员系统常用的判断用户是否登录
String userName = "";
String email = "";
HttpCookie cookies = Request.Cookies["user"];
if (cookies != null)
{
    userName = cookies["userName"];
    email = cookies["email"];
    cookies.Expires = DateTime.Now.AddMilliseconds(5000); //给当前Cookies增加5毫秒生命周期
    Response.Cookies.Add(cookies);
}
else
{
    Response.Redirect("/Login.aspx");
}
Response.Write("userName = "+userName+"<br>email = "+email);