asp.net Cookie跨域、虚拟目录等设置方法

Cookie有三个属性需要注意一下：

. Domain 域

. Path 路径

. Expires 过期时间

跨域操作需要设置域属性:

Response.Cookies("MyCookie").Domain = "jb51.net"; (这里指的是泛域名)

这样在其它二级域名下就都可以访问到了， ASP 和 ASP.NET 测试通过

虚拟目录下访问：

我在ASP端做了下测试，.NET的没试, 如果不指定Path属性， 不同虚拟目录下Cookie无法共享

将Response.Cookies("MyCookie").Path = "/" 就可以了

总的写法:

复制代码 代码如下:

Response.Cookies("MyCookie").Domain = "jb51.net";

Response.Cookies("MyCookie").Path = "/"

Response.Cookies("MyCookie").Expires = Now + 365;

Response.Cookies("MyCookie")("Test") = "test";

.NET 清除Cookie

复制代码 代码如下:

   public void DeleteCookie(string cookiename, string _domain, string _cookiepath)

        {

            HttpCookie cookie = System.Web.HttpContext.Current.Request.Cookies[cookiename];

            if (cookie != null)

            {

                cookie.Values.Clear();

                SetUserCookieExpireTime(cookiename, -1,,  _domain,  _cookiepath);

                cookie.Domain = _domain;

                System.Web.HttpContext.Current.Response.Cookies.Set(cookie);

            }

        }

        public static void SetUserCookieExpireTime(string key, int days, string _domain, string _cookiepath)

        {

            System.Web.HttpContext.Current.Response.Cookies[key].Domain = _domain;

            System.Web.HttpContext.Current.Response.Cookies[key].Path = _cookiepath;

            System.Web.HttpContext.Current.Response.Cookies[key].Expires = DateTime.Now.AddDays(days);

        }

.NET 添加/更新Cookie

复制代码 代码如下:

  public static void AddUserCookies(string key, string value, string cookiename, string domain, string _cookiepath)

        {

            HttpCookie cookie = System.Web.HttpContext.Current.Request.Cookies[cookiename];

            if (cookie == null)

            {

                cookie = new HttpCookie(cookiename);

                cookie.Domain = domain;

                cookie.Path = _cookiepath;                 cookie.Values.Add(key, value);

                HttpContext.Current.Response.AppendCookie(cookie);

            }

            else

            {

                if (System.Web.HttpContext.Current.Request.Cookies[cookiename].Values[key] != null)

                {

                    cookie.Values.Set(key, value);

                }

                else

                {

                    cookie.Domain = domain;

                    cookie.Path = _cookiepath;                     cookie.Values.Add(key, value);

                    HttpContext.Current.Response.AppendCookie(cookie);

                }

            }

        }

身份验证Cookie域,什么意思?

默认情况下，Cookie 与特定的域相关联。例如，如果您的站点是 www.jb51.net，那么当用户向该站点请求页面时，您编写的 Cookie 就被发送到服务器。（有特定路径值的 Cookie 除外。） 如果您的站点有子域（例如 jb51.net、s.jb51.net 和 tools.jb51.net），就可以把 Cookie 同特定的子域相关联。为此，需要设置 Cookie 的 Domain 属性，如下所示：

复制代码 代码如下:

Response.Cookies("domain").Value = DateTime.Now.ToString

Response.Cookies("domain").Expires = DateTime.Now.AddDays(1)

Response.Cookies("domain").Domain = "s.jb51.net"

如果按照这种方式设置域，则 Cookie 只能用于指定子域中的页面。

您也可以利用 Domain 属性来创建可在多个子域中共享的 Cookie。例如，对域进行如下设置：

复制代码 代码如下:

Response.Cookies("domain").Value = DateTime.Now.ToString

Response.Cookies("domain").Expires = DateTime.Now.AddDays(1)

Response.Cookies("domain").Domain = "jb51.net"

这样，该 Cookie 就可用于主域、s.jb51.net 和 tools.jb51.net。

  //读取 Cookie 集合

            for (int i = 0; i < Request.Cookies.Count; i++)

            {

                HttpCookie cookies = Request.Cookies[i];

                Response.Write("name=" + cookies.Name + "<br/>");

                if (cookies.HasKeys)//是否有子键

                {

                    System.Collections.Specialized.NameValueCollection NameColl

                                                         = cookies.Values;

                    for (int j = 0; j < NameColl.Count; j++)

                    {

                        Response.Write("子键名=" + NameColl.AllKeys[j] + "<br/>");

                        Response.Write("子键值=" + NameColl[j] + "<br/>");

                    }

                }

                else

                {

                    Response.Write("value=" + cookies.Value + "<br/>");

                }

            }