RadAjaxLoadingPanel

[Shamim]

I have a radajaxloading panel as followed:

 

<td runat="server" style="padding-bottom:15px; width:40px;">

 

 

 

<asp:Panel ID="pnlHolder" runat="server" Visible="true" ></asp:Panel>

 

 

 

 

<telerik:RadAjaxLoadingPanel id="LoadingPanel1" runat="server" Width="30px"

 

 

Height="30px" IsSticky="false" >

 

 

 

<asp:Image id="Image2" runat="server" ImageUrl="~/Image/ajax-loader.gif" />

 

 

 

</telerik:RadAjaxLoadingPanel>

 

 

 

</td>

 

I have a click event that fires a javascript as followed based on a click event:

<

 

script type="text/javascript" language="javascript">

 

 

var currentLoadingPanel = null;

 

 

var currentUpdatedControl = null;

 

 

 

function AjaxRequestStart() {

 

 

 

if (document.getElementById("<%= hdnAvailabilityChecker.ClientID %>").value == 1) {

 

 

return;

 

}

 

 

if (document.getElementById("<%= TextBox7.ClientID %>").value == "") {

 

 

return;

 

}

 

 

document.getElementById(

"<%= TextBox7.ClientID %>").value = document.getElementById("<%= TextBox7.ClientID %>").value.toUpperCase();

 

 

currentLoadingPanel = $find(

"<%= LoadingPanel1.ClientID %>");

 

 

currentUpdatedControl =

"<%=pnlHolder.ClientID %>";

 

 

currentLoadingPanel.show(currentUpdatedControl);

 

var t = setTimeout("AjaxResponseEnd()", 2000);

 

}

 

 

function AjaxResponseEnd() {

 

 

if (currentLoadingPanel != null) {

 

currentLoadingPanel.hide(currentUpdatedControl);

document.getElementById(

"<%= hdnAvailabilityChecker.ClientID %>").value = 1;

 

 

}

 

 

}

The script works fine when we click the button for the first time. But on the second click it throws the following message:

Microsoft JScript runtime error: Sys.InvalidOperationException: Could not find UpdatePanel with ID 'ctl00_ctl00_MainContent_pnlHolderPanel'. If it is being updated dynamically then it must be inside another UpdatePanel.

Any help on this will be appreciated. Thanks.

[Pavlina]

Hi Shamim,

Could you please confirm that pnlHolder is always visible or somewhere  you change its visibility. If so I suggest that you wrap pnlHolder in another panel which is always visible. This should eliminate the error.

Kind regards,
Pavlina
the Telerik team

[Shamim]

Please take a look at the code. The visibility property is already set to true.

[Pavlina]

Hello Shamim,

Can you share a piece of runnable code which illustrates the issue you are facing? We will thus be able to further investigate it.

All the best,
Pavlina
the Telerik team