public void BindSearchGrid()
    {
        objBll = new WarringtonBll.WarringtonBll();
        SearchParam objSearchParam = new SearchParam()
        {
            UserId = Utility.GetSessionValue<string>(Constants._LOGINUSERID),
            RequestStatus = txtStatus.Text,
            RequestNo = txtRequestNo.Text,
            RequestDate = string.IsNullOrEmpty(txtRequestDate.Text) ? DateTime.MinValue :
            DateTime.ParseExact(txtRequestDate.Text, "MM/dd/yyyy", null),
            CompareOperator=ddlOperator.SelectedValue,
            NoOfData=Convert.ToInt32(ddlPageSize.SelectedValue)
        };
        List<UserRequest> lstRequest = objBll.SearchRequest(objSearchParam);
        DataTable dtSearchResult = new DataTable();
        dtSearchResult.Columns.Add("Request_No");
        dtSearchResult.Columns.Add("Request_ID");
        dtSearchResult.Columns.Add("Request_Date");
        dtSearchResult.Columns.Add("Request_ChangeDate");
        dtSearchResult.Columns.Add("Request_Status");
        dtSearchResult.Columns.Add("Request_Address");
        dtSearchResult.Columns.Add("Request_ShortDesc");
        dtSearchResult.Columns.Add("Request_LongDesc");

        foreach (UserRequest  objrequest in lstRequest)
        {
            DataRow drRequest = dtSearchResult.NewRow();
            drRequest["Request_No"] = objrequest.RequestNo;
            drRequest["Request_ID"] = objrequest.RequestId;
            drRequest["Request_Date"] = objrequest.CreateDate.Value.Date.ToShortDateString();
            drRequest["Request_ChangeDate"] = objrequest.UpdateDate!=null?objrequest.UpdateDate.Value.Date.ToShortDateString():null;
            drRequest["Request_Status"] = objrequest.Status.Trim().Equals("O")?"Open":"Closed";
            drRequest["Request_Address"] = objrequest.ProblemLocation;
            drRequest["Request_ShortDesc"] = objrequest.ShortDescription;
            drRequest["Request_LongDesc"] = objrequest.LongDescription;
            dtSearchResult.Rows.Add(drRequest);
        }
        dtSearchResult.AcceptChanges();
        grdRequests.PageSize = Convert.ToInt32(ddlPageSize.SelectedValue);
        if (!dtSearchResult.DataTableIsEmpty())
        {
            Utility.SetSessionValue(Constants._SEARCHREQUESTDATA, dtSearchResult);
            grdRequests.DataSource = dtSearchResult;
            grdRequests.DataBind();
        }
        else
        {
            grdRequests.Dispose();
            grdRequests.DataBind();
        }
    }