//通用設(shè)置
Response.Cookies["userName"].Value = "Park";
Response.Cookies["userName"].Expires = DateTime.Now.AddDays(1);//不設(shè)Expires默認關(guān)閉瀏覽器就過期
Response.Cookies["userName"].Domain = "park.aa.com";//Domain默認為域名部分，以表示aa.com下的所有子域名。
Response.Cookies["userName"].Path = "App1";//Path默認為根目錄"/"，表示根目錄下的所有頁面和子目錄

//單值Cookie
HttpCookie Cookie = new HttpCookie("userName");
cookie.Value = "Park";
cookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(cookie);

//多值Cookie
HttpCookie cookies = new HttpCookie("userName");
cookies["name"] = "Park";
cookies["sex"] = "1";
cookies.Expires = DateTime.Now.AddMinutes(20);
Response.Cookies.Add(cookies);
//Response.SetCookies(cookies)
//Response.AppendCookis(cookies);

if (Request.Cookies["userName"] != null)
{
    //讀取多值Cookie
    Response.Write(Request.Cookies["userName"].Value) //可以Server.HtmlEncode()編碼
   //讀取多值Cookie
    Response.Write("Cookie中鍵值為userid的值:" + Request.Cookies["userName"]["sex"]);
}

HttpCookie cok = Request.Cookies["userName"];//獲取客戶端的Cookie對象
if (cok != null)
{
    cok.Values["userid"] = "alter-value";//修改Cookie        
    cok.Values.Set("newid", "newValue");//往Cookie里加入新的內(nèi)容
    Response.AppendCookie(cok);

    //或者
    Response.Cookies["userName"].Value = "aa";
}
 
Response.Cookies["Porschev"].Expires = DateTime.Now.AddMinutes(-1); 

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

//或者
HttpCookie cok = Request.Cookies["userName"];
if (cok != null)
{
    if (!CheckBox1.Checked)
    {
        cok.Values.Remove("userid");//移除鍵值為userid的值
    }
    else
    {
        TimeSpan ts = new TimeSpan(0, 0, 0, 0);
        cok.Expires = DateTime.Now.Add(ts);//刪除整個Cookie，只要把過期時間設(shè)置為現(xiàn)在
    }
    Response.AppendCookie(cok);
}