Cookie的创建、读取、修改、删除

最新推荐文章于 2023-11-06 22:22:11 发布

原创最新推荐文章于 2023-11-06 22:22:11 发布 · 829 阅读

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本文介绍了如何在ASP.NET应用程序中使用Cookies进行用户状态管理，包括创建、读取、更新和删除Cookies的方法，并提供了实际代码示例。

创建
Response.Cookies["userName"].Value = "patrick";
Response.Cookies["userName"].Expires = DateTime.Now.AddDays(1);

HttpCookie aCookie = new HttpCookie("lastVisit");
aCookie.Value = DateTime.Now.ToString();
aCookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(aCookie);

读取
if(Request.Cookies["userName"] != null)
Label1.Text = Server.HtmlEncode(Request.Cookies["userName"].Value);

if(Request.Cookies["userName"] != null)
{
HttpCookie aCookie = Request.Cookies["userName"];
Label1.Text = Server.HtmlEncode(aCookie.Value);
}

修改
int counter;
if (Request.Cookies["counter"] == null)
counter = 0;
else
{
counter = int.Parse(Request.Cookies["counter"].Value);
}
counter++;

Response.Cookies["counter"].Value = counter.ToString();
Response.Cookies["counter"].Expires = DateTime.Now.AddDays(1);

删除
HttpCookie aCookie;
string cookieName;
int limit = Request.Cookies.Count;
for (int i=0; i<limit; i++)
{
    cookieName = Request.Cookies[i].Name;
    aCookie = new HttpCookie(cookieName);
    aCookie.Expires = DateTime.Now.AddDays(-1);
    Response.Cookies.Add(aCookie);
}