Cookie读写

config

<configuration>
<appSettings>
<add key="UserCookie" value="UserName"/>
</appSettings>
</configuration>

.cs

//读取判断cookie为空为cookie赋一个值

protected void Page_Load(object sender, EventArgs e)
{

        string cookieName = System.Configuration.ConfigurationManager.AppSettings["UserName"];

if (Request.Cookies[cookieName] == null)
             {
                 HttpCookie cookie = HttpContext.Current.Request.Cookies[cookieName];
                 if (cookie == null)
                 {
                     cookie = new HttpCookie(cookieName);
                 }
                 cookie.Value = "111111";
                 cookie.Expires = DateTime.MaxValue;
                 Response.SetCookie(cookie);
             }
      return Request.Cookies[cookieName].Value;
}