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login.aspx.cs

 

      protected void Page_Load(object sender, EventArgs e)
      {

            if (!IsPostBack)
            {
                  ViewState["referrer"] = Common.Request.GetUrlReferrer();
                  
            }

      }

 

 

 

 

      protected void btn1_click(object sender, EventArgs e)
      {
            string urlreferrer = ViewState["referrer"].ToString();   //因为btn事件回发，所以这里得到是本页
            string str = this.Request.UrlReferrer.ToString();
            string host = Common.Request.GetHost();
            if (host == "localhost" && str != null)  //判断主机头
            {
                  Response.Redirect(urlreferrer);
            }
            else
            {
                  Response.Redirect("~/default.aspx");
            }
      }