protected void valCheckbox1_ServerValidate(object source, ServerValidateEventArgs args)
    {
        if (chk_Action_1.Checked)
        {
            if (txtCheckinUrl.Text.Trim() == "")
            {
                RequiredFieldValidator1.IsValid = false;
                return;
            }
            importfbpagedetails fb = new importfbpagedetails();
            page_id = fb.getPageDetails(txtCheckinUrl.Text);
            if (page_id == "")
            {
                RequiredFieldValidator1.IsValid = false;
                return;
            }
            args.IsValid = true;

        }
        else
        {
            args.IsValid = false;
            chk_Action_1.BackColor = System.Drawing.ColorTranslator.FromHtml("#FFAAAA");
        }
    }
    private string GetPageSMID()
    {
        string page_url = txtPageUrl.Text.Trim();
        string sm_page_id = "";
        if (SessionState.EditId_2 == 1)
        {
            var start = page_url.LastIndexOf("/") + 1;
            var end = page_url.Length;
            String page_url1 = page_url.Substring(start, end - start);
            importfbpagedetails obj = new importfbpagedetails();
            sm_page_id = obj.getPageDetails(page_url1);
            txtPageName.Text = obj.page_tag;

            if (sm_page_id == "")
            {
                lblErrorMsg.Text = "Invalid page";
                return "ERROR";
            }
        }
        else if (SessionState.EditId_2 == 2)
        {
            //var start = page_url.LastIndexOf("/") + 1;
            //var end = page_url.Length;
            //sm_page_id = page_url.Substring(start, end - start);

            //importtwitterbranddetails obj = new importtwitterbranddetails();
            //sm_page_id = obj.getPageDetails(sm_page_id);
            //txtPageName.Text = obj.page_tag;

            //if (sm_page_id == "")
            //{
            //    lblErrorMsg.Text = "Invalid page";
            //    return "ERROR";
            //}

            var start = page_url.LastIndexOf("/") + 1;
            var end = page_url.Length;
            sm_page_id = page_url.Substring(start, end - start);

            return CreateInstaPage();
        }
        else if (SessionState.EditId_2 == 3)
        {
            var start = page_url.LastIndexOf("/") + 1;
            var end = page_url.Length;
            sm_page_id = page_url.Substring(start, end - start);

            return CreateInstaPage();
        }
        else if (SessionState.EditId_2 == 4)
        {
            var start = page_url.LastIndexOf("/") + 1;
            var end = page_url.Length;
            sm_page_id = page_url.Substring(start, end - start);
            txtPageName.Text = sm_page_id;
            if (sm_page_id == "")
            {
                lblErrorMsg.Text = "Invalid page";
                return "ERROR";
            }
        }
        return sm_page_id;
    }