//写入cookie登录记录作为其它系统使用

        public void writeCookie(string user, string password, string Ulevel, string Utype)

        {

            //deleteCookie();//增记录时删除以前的用户记录

            HttpContext.Current.Response.Cookies["UserName"].Value = user;

            HttpContext.Current.Response.Cookies["Userpass"].Value = password;

            //HttpContext.Current.Response.Cookies["Ulevel"].Value=Ulevel;//暂时不用

            //HttpContext.Current.Response.Cookies["Utype"].Value=Utype;

            HttpContext.Current.Response.Cookies["UserName"].Domain = ".zgbfw.com";

            HttpContext.Current.Response.Cookies["Userpass"].Domain = ".zgbfw.com";

            HttpContext.Current.Response.Cookies["UserName"].Domain = "js.zgbfw.com";

            HttpContext.Current.Response.Cookies["Userpass"].Domain = "js.zgbfw.com";

            //HttpContext.Current.Response.Cookies["Ulevel"].Domain=".zgbfw.com";

            //HttpContext.Current.Response.Cookies["Utype"].Domain=".zgbfw.com";

            HttpContext.Current.Response.Cookies["UserName"].Expires = DateTime.Now.AddMinutes(20);

            HttpContext.Current.Response.Cookies["Userpass"].Expires = DateTime.Now.AddMinutes(20);

            //HttpContext.Current.Response.Cookies["Ulevel"].Expires=DateTime.Now.AddMinutes(0);

            //HttpContext.Current.Response.Cookies["Utype"].Expires=DateTime.Now.AddMinutes(0);

        }

//清除cookie

        public void deleteCookie()

        {

            HttpCookie acookie = HttpContext.Current.Request.Cookies["Username"];

            if (acookie != null)

            {

                acookie.Expires = DateTime.Now.AddDays(-20);

                acookie.Domain = ".zgbfw.com";

                HttpContext.Current.Response.AppendCookie(acookie);

            }

            HttpCookie acookie1 = HttpContext.Current.Request.Cookies["Userpass"];

            if (acookie1 != null)

            {

                acookie1.Expires = DateTime.Now.AddDays(-20);

                acookie1.Domain = ".zgbfw.com";

                HttpContext.Current.Response.AppendCookie(acookie1);

            }

        }

第二

HttpCookie cookies = Request.Cookies["txtname"];

    if (cookies == null)

    {

     cookies = new HttpCookie("txtname", this.txtname.Text);

     cookies.Domain = ".zgbfw.com";

     Response.Cookies.Set(cookies);

    }

    else

    {               

     cookies.Value = this.txtname.Text;

     cookies.Domain = ".zgbfw.com";

     Response.Cookies.Set(cookies);

     cookies = new HttpCookie("txtname", this.txtname.Text);

    }

HttpCookie cookies = Request.Cookies["txtname"];

            if (cookies != null)

            {

            }

            else

            {

            } 

 if (Request.QueryString["Cokkiesid"] == "CookiesValue")

                {

                    //HttpCookie cookies = Request.Cookies["txtname"];

                    cookies.Value = "";

                    cookies.Domain = ".zgbfw.com";

                    Response.Cookies.Set(cookies);

                    Response.Redirect("http://tech.zgbfw.com");

                }