cookie的操作在C#中

写cookie
HttpCookie cookie = new HttpCookie("Info");
//定义cookie对象以及名为Info的项
DateTime dt = DateTime.Now;
//定义时间对象
TimeSpan ts=new TimeSpan(1,0,0,0);
//cookie有效作用时间，具体查msdn
cookie.Expires = dt.Add(ts);
//添加作用时间
cookie.Values.Add("user","cxbkkk");
//增加属性
cookie.Values.Add("userid","1203");
Response.AppendCookie(cookie);
//确定写入cookie中

读取cookie

if(Request.Cookies["Info"]!=null) 
{ string temp=Convert.ToString(Request.Cookies["Info"].Values["user"])+" "+Convert.ToString(Request.Cookies["Info"].Values["userid"]); 
//读全部就用
Request.Cookies["Info"].Value) if(temp=="") { Response.Write("空"); } else Response.Write(temp); } else { Response.Write("error"); } 

if(Request.Cookies["Info"]!=null)
{ string temp=Convert.ToString(Request.Cookies["Info"].Values["user"])+" "+Convert.ToString(Request.Cookies["Info"].Values["userid"]);
//读全部就用
Request.Cookies["Info"].Value) if(temp=="") { Response.Write("空"); } else Response.Write(temp); } else { Response.Write("error"); }

修改cookie
Response.Cookies["Info"]["user"] = "2";
Response.Cookies["Info"].Expires = DateTime.Now.AddDays(1);

删除cookie下的属性
HttpCookie acookie=Request.Cookies["Info"];
acookie.Values.Remove("userid");
acookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(acookie);

删除所有cookie
就是设置过期时间为现在就行了
for(int i=0;i<limit;i++)
 {
    acookie = Request.Cookies(i)
    acookie.Expires = DateTime.Now.AddDays(-1)
    Response.Cookies.Add(acookie)
}