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Loading panel shows a blank screen.

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AjaxLoadingPanel

This is a migrated thread and some comments may be shown as answers.

Shannon asked on 14 Jul 2015, 01:36 PM

I am trying to use a loading panel on a RadGrid but when the loading panel fires it just turns the grid into a white blank screen. Can you tell me why this is happening

<%@ Page Title="" Language="C#" MasterPageFile="~/ARF.Master" AutoEventWireup="true" CodeBehind="EmployeeInfo.aspx.cs" Inherits="ARF.EmployeeInfo" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">

<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">

<script type="text/javascript">

function openConfirmationWindow(ID) {

radWindow1.set_title(ID);

radWindow1.show();

}

function bookNowCloseClicking(sender, args) {

radWindow1.close();

togglePanels();

args.set_cancel(true);

}

function bookNowClicking(sender, args) {

togglePanels();

args.set_cancel(true);

}

function cancelClicking(sender, args) {

radWindow1.close();

args.set_cancel(true);

}

function togglePanels() {

var step1Visible = panelStep1.style.display != "none";

panelStep1.style.display = step1Visible ? "none" : "";

panelStep2.style.display = step1Visible ? "" : "none";

</script>

</telerik:RadCodeBlock>

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="cphNameDivision" runat="server">

</asp:Content>

<asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">

<div class="well-large whitebg featurett one-edge-shadow minheight">

<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">

</telerik:RadAjaxLoadingPanel>

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="RadGrid1">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<telerik:RadPersistenceManager ID="RadPersistenceManager1" runat="server" StorageProviderKey="OverviewDemoStorage">

<PersistenceSettings>

<telerik:PersistenceSetting ControlID="RadGrid1" />

</PersistenceSettings>

</telerik:RadPersistenceManager>

<div>

<telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" AllowSorting="True"

OnNeedDataSource="RadGrid1_NeedDataSource"

OnItemCommand="RadGrid1_ItemCommand" CellSpacing="0" GridLines="None">

<GroupingSettings CaseSensitive="false" />

<MasterTableView AutoGenerateColumns="false" TableLayout="Fixed">

<HeaderStyle Width="102px" />

<Columns>

<telerik:GridBoundColumn DataField="FirstLastName" HeaderText="Name" UniqueName="FirstLastName">

<HeaderStyle Width="110px" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="Department" HeaderText="Department" UniqueName="Department">

<HeaderStyle Width="200px" />

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="EmploymentType" HeaderText="Employment Type" UniqueName="EmploymentType">

<HeaderStyle Width="110px" />

</telerik:GridBoundColumn>

</Columns>

<NestedViewTemplate>

<div class="carBackground">

<div style="float: right; width: 85%">

<strong>

<div class="EmployeeName">

<%# Eval("FirstName") %>

<%# Eval("MI") %>

<%# Eval("LastName") %>

</div>

</strong>

<hr class="lineSeparator" />

<table width="50%" class="EmployeeInfo">

<tr>

<td style="text-align: right;">

<strong>Division:</strong>

</td>

<td>

<telerik:RadDropDownList ID="ddlDivision" runat="server" DropDownHeight="200px" Width="200px"

DefaultMessage="Select a Division" DropDownWidth="200px"

DataValueField="ID" DataTextField="Name" DataSourceID="sdsDivisions" SelectedValue='<%# Bind("DivisionID") %>'>

</telerik:RadDropDownList>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Turnpike:</strong>

</td>

<td>

<telerik:RadDropDownList ID="ddlDivisions" runat="server" DropDownHeight="200px" Width="200px"

DefaultMessage="Select a Division" DropDownWidth="200px"

DataValueField="ID" DataTextField="Name" DataSourceID="sdsTurnpikes" SelectedValue='<%# Bind("TurnpikeID") %>'>

</telerik:RadDropDownList>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Location:</strong>

</td>

<td>

<telerik:RadDropDownList ID="ddlLocations" runat="server" DropDownHeight="200px" Width="200px"

DefaultMessage="Select a Location" DropDownWidth="200px"

DataValueField="ID" DataTextField="CodeDescription" DataSourceID="sdsLocations" SelectedValue='<%# Bind("LocationID") %>'>

</telerik:RadDropDownList>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Supervisor:</strong>

</td>

<td>

<telerik:RadDropDownList ID="ddlSupervisors" runat="server" DropDownHeight="200px" Width="200px"

DefaultMessage="Select a Supervisor" DropDownWidth="200px"

DataValueField="ID" DataTextField="Name" DataSourceID="sdsSupervisors" SelectedValue='<%# Bind("SupervisorID") %>'>

</telerik:RadDropDownList>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Employment Type:</strong>

</td>

<td>

<telerik:RadTextBox ID="txtEmploymentType" runat="server" Text='<%# Bind("EmploymentType") %>'>

</telerik:RadTextBox>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Job Title:</strong>

</td>

<td>

<telerik:RadDropDownList ID="ddlJobTitles" runat="server" DropDownHeight="200px" Width="275px"

DefaultMessage="Select a Job Title" DropDownWidth="275px"

DataValueField="ID" DataTextField="Name" DataSourceID="sdsJobTitles" SelectedValue='<%# Bind("JobTitleID") %>'>

</telerik:RadDropDownList>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Approves Leave:</strong>

</td>

<td>

<asp:CheckBox ID="chkApprovesLeave" runat="server" Checked='<%# Bind("ApprovesLeave") %>'/>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Comp Time at 1.5:</strong>

</td>

<td>

<asp:CheckBox ID="chkTimeAndHalf" runat="server"

Checked='<%# Bind("CompTimeAndAHalf") %>'/>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Hire Date:</strong>

</td>

<td>

<asp:TextBox ID="txtHireDate" runat="server" Text='<%# Eval("HireDate") %>'></asp:TextBox>

<asp:ImageButton ID="imgPopup" ImageUrl="~/img/calendar.png" ImageAlign="Bottom"

runat="server" />

<cc1:CalendarExtender ID="Calendar1" PopupButtonID="imgPopup" runat="server" TargetControlID="txtHireDate"

Format="dd/MM/yyyy">

</cc1:CalendarExtender>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Termination Date:</strong>

</td>

<td>

<asp:TextBox ID="txtTerminationDate" runat="server" Text='<%# Eval("ExpireDate") %>'></asp:TextBox>

<asp:ImageButton ID="ImageButton1" ImageUrl="~/img/calendar.png" ImageAlign="Bottom"

runat="server" />

<cc1:CalendarExtender ID="Calendar2" PopupButtonID="ImageButton1" runat="server" TargetControlID="txtTerminationDate"

Format="dd/MM/yyyy">

</cc1:CalendarExtender>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Termination Type:</strong>

</td>

<td>

<telerik:RadDropDownList ID="ddlTerminationType" runat="server" DropDownHeight="200px" Width="275px"

DefaultMessage="Select a Termination Type" DropDownWidth="275px"

DataValueField="ID" DataTextField="Name" DataSourceID="sdsTerminationTypes" SelectedValue='<%# Bind("TerminationTypeID") %>'>

</telerik:RadDropDownList>

</td>

</tr>

<tr>

<td style="text-align: right;">

<strong>Termination Comments:</strong>

</td>

<td>

<telerik:RadTextBox runat="server" ID="txtTerminationComments" Width="216px" EmptyMessage="Enter termination comments" TextMode="MultiLine" Height="100px" Resize="None"></telerik:RadTextBox>

<%# Eval("TerminationComments") %>

</td>

</tr>

<tr>

<td></td>

<td>

<telerik:RadButton ID="btnSubmit" runat="server" CommandName="SaveEmployee" CommandArgument='<%# Eval("EmployeeID") %>' Text="Save Employee">

</telerik:RadButton>

</td>

</tr>

</table>

</div>

<div style="clear: both">

</div>

</NestedViewTemplate>

<PagerStyle PageSizes="5,10,20,50" PagerTextFormat="{4}<strong>{5}</strong> employees matching your search criteria"

PageSizeLabelText="Employees per page:" />

</MasterTableView>

<ClientSettings EnableRowHoverStyle="true" EnablePostBackOnRowClick="true">

<Selecting AllowRowSelect="true" EnableDragToSelectRows="false" />

<Scrolling AllowScroll="true" UseStaticHeaders="true" ScrollHeight="" />

</ClientSettings>

</telerik:RadGrid>

</div>

<asp:SqlDataSource ID="sdsDivisions" runat="server" ConnectionString="<%$ ConnectionStrings:ARF %>"

SelectCommand="usp_Get_All_Divisions" SelectCommandType="StoredProcedure"></asp:SqlDataSource>

<asp:SqlDataSource ID="sdsTurnpikes" runat="server" ConnectionString="<%$ ConnectionStrings:ARF %>"

SelectCommand="usp_Get_All_Turnpikes" SelectCommandType="StoredProcedure"></asp:SqlDataSource>

<asp:SqlDataSource ID="sdsLocations" runat="server" ConnectionString="<%$ ConnectionStrings:ARF %>"

SelectCommand="usp_Get_All_Locations" SelectCommandType="StoredProcedure"></asp:SqlDataSource>

<asp:SqlDataSource ID="sdsSupervisors" runat="server" ConnectionString="<%$ ConnectionStrings:ARF %>"

SelectCommand="usp_Get_All_Supervisors" SelectCommandType="StoredProcedure"></asp:SqlDataSource>

<asp:SqlDataSource ID="sdsJobTitles" runat="server" ConnectionString="<%$ ConnectionStrings:ARF %>"

SelectCommand="usp_Get_All_JobTitles" SelectCommandType="StoredProcedure"></asp:SqlDataSource>

<asp:SqlDataSource ID="sdsTerminationTypes" runat="server" ConnectionString="<%$ ConnectionStrings:ARF %>"

SelectCommand="usp_Get_Termination_Types" SelectCommandType="StoredProcedure"></asp:SqlDataSource>

</div>

</asp:Content>

Loading panel shows a blank screen.

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