Silverlight读取和设置Cookie

源码，直接复制使用就OK

using System;
using System.Windows.browser;
using System.Text;
using System.Linq;

 

public class CookiesUtils
    {
        /// <summary>
        /// 设置持久时间长的Cookie
        /// </summary>
        public static void SetCookie(string key,string value)
        {

            string oldCookie = HtmlPage.Document.GetProperty("cookie") as String;

            DateTime expiration = DateTime.UtcNow + TimeSpan.FromDays(2000);

            string cookie = String.Format("{0}={1};expires={2}",key,value,expiration.ToString("R"));

            HtmlPage.Document.SetProperty("cookie",cookie);

        }

        /// <summary>
        /// 读取一个已经存在的Cookie
        /// </summary>
        public static string GetCookie(string key)
        {
            string[] cookies = HtmlPage.Document.Cookies.Split(';');
            key += '=';
            foreach (string cookie in cookies)
            {
                string cookieStr = cookie.Trim();
                if (cookieStr.StartsWith(key,StringComparison.OrdinalIgnoreCase))
                {
                    string[] vals = cookieStr.Split('=');
                    if (vals.Length >= 2)
                    {
                        return vals[1];
                    }
                    return string.Empty;
                }
            }

            return string.Empty;
        }

        /// <summary>
        /// 删除特定的Cookie(清空它的Value值，过期值设置为-1天)
        /// </summary>
        public static void DeleteCookie(string key)
        {
            string oldCookie = HtmlPage.Document.GetProperty("cookie") as String;
            DateTime expiration = DateTime.UtcNow - TimeSpan.FromDays(1);
            string cookie = String.Format("{0}=;expires={1}",expiration.ToString("R"));
            HtmlPage.Document.SetProperty("cookie",cookie);
        }

        public static bool Exists(String key,String value)
        {
            return HtmlPage.Document.Cookies.Contains(
                String.Format("{0}={1}",value)
                );
        }

        public static string GetCookieContent()         {             return HtmlPage.Document.GetProperty("cookie") as String;         }     }