mvc4实现跨域名cokkie共享。

网上搜一下都很多，按上面的代码发现无法正常共享。我们的站点是使用IIS7

经过一段时间研究。实现了，。特将代码共享出来，首先是c#代码

      /// <summary>
        /// 登录成功后，设置COOKIE
        /// </summary>
        /// <param name="entity"></param>
        public void SaveUserFormsCookie(LoginUser entity, bool isRememberMe = false)
        {
            var userDate = SerializationHelper.JsonSerialize(entity);  //将对象序列化
            var cookieTime = DateTime.Now;
            var cookieExpiration = cookieTime.AddMinutes(FormsAuthentication.Timeout.TotalMinutes);
            if (isRememberMe)
            {
                cookieExpiration = cookieTime.AddYears(1);
            }
            var ticket = new FormsAuthenticationTicket(1, entity.Username, cookieTime, cookieExpiration, false, userDate);
            var hash = FormsAuthentication.Encrypt(ticket);

            var cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hash)
            {
                Expires = cookieExpiration,
                Domain = FormsAuthentication.CookieDomain,
                Path = FormsAuthentication.FormsCookiePath
            };
            HttpContext.Current.Response.Cookies.Add(cookie);
        }

　　然后是web配置，必须要有一个加密算法的匹配。我们增加的cokkieY有做加密。然后如果你是.net 4 ,和4.5加密算法还不一样，必须统一，接下来是Web.config配置节点 <system.web>增加

  <httpRuntime targetFramework="4.0" /> 这个版本最好不同站点统一一下。按这样的配置即可共享

<compilation debug="true" targetFramework="4.0" />
    <httpRuntime targetFramework="4.0" />
    <!--共享cokkies-->
    <authentication mode="Forms">
      <forms loginUrl="~/account/login" name="accountUser" timeout="720" domain="xxx.com" path="/"></forms>
    </authentication>
    <httpCookies domain="kaopu001.com" />
    <machineKey validationKey="69C632A1E794CD859422A7C4F2BBD3C6783A84488AF5646B610171C058C1E2F78D8FB5823681ABD108BC1E5427C99F5EB3B69EE1D00235276EF4898F9972EA28" decryptionKey="BC5B10779346BD18168E37F5660D89A17D8B7CFF14AB0AA5" decryption="3DES" validation="SHA1"/>

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