private void search() { if (txtDateFrom.Text.Trim() == "" || txtDateTo.Text.Trim() == "" || txtTimeFrom.Value == "" || txtTimeTo.Value == "") { Page.ClientScript.RegisterStartupScript(GetType(), "Message", "alert('All the parameters must fill');", true); return; } ProposalUploadController proposalUploadController = new ProposalUploadController(); ltrlSummary.Text = proposalUploadController.GetTimeRangeJobReport(txtDateFrom.Text, txtDateTo.Text, txtTimeFrom.Value, txtTimeTo.Value); }