public void BindGrid()
    {
        int custid;

        custid           = Convert.ToInt16(drpRegion.SelectedValue);
        colservicewindow = objservicewindow.Get_All();
        BLLCollection <ServiceWindow_mst> colservicewindow1 = new BLLCollection <ServiceWindow_mst>();

        foreach (ServiceWindow_mst obj in colservicewindow)
        {
            int flag;
            flag = objCustToSite.Get_By_Id(custid, obj.Siteid);
            if (flag == 1)
            {
                colservicewindow1.Add(obj);
            }
        }

        grdvwViewServiceWindow.DataSource = colservicewindow1;
        grdvwViewServiceWindow.DataBind();
    }