Cookies的用法——用戶登陸和註銷

關於cookies的詳細用法——用戶登陸和註銷(.NET版) 登陸(記錄Cookies用戶名)
HttpCookie myCookie = new HttpCookie("userinfo");
myCookie["uname"] = txtName.Text.Trim();
myCookie.Expires = DateTime.Now.AddDays(1d);
Response.Cookies.Add(myCookie);

顯示（用戶名）

if (Request.Cookies["userinfo"] != null)
{

　　 if (Request.Cookies["userinfo"]["uname"] != null)
　　{ userName.Text = Convert.ToString(Request.Cookies["userinfo"]["uname"]); }
}

刪除Cookies

if (Request.Cookies["userinfo"] != null)
{
HttpCookie myCookie = new HttpCookie("userinfo");
myCookie["uname"] = null;
myCookie.Expires = DateTime.Now.AddDays(-1d);
Response.Cookies.Add(myCookie);

　　　}