MinDisplayTime in RadAjaxLoadingPanel has no effect

[Valera]

Toolkit version: Q2 2011

<telerik:RadAjaxLoadingPanel ID="loading_tabs" runat="server" IsSticky="true" MinDisplayTime="2000" InitialDelayTime="250">
 Loading ...
 </telerik:RadAjaxLoadingPanel>

When RadAjaxLoadingPanel's property "IsSticky" is set to true, MinDisplayTime doesn't make a difference. LoadingPanel disappears as soon as request is complete.

Please Advice

[Shinu]

Hello Valera,

I tried the following scenario and it worked on my end.Hope this helps.
aspx:

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
   <AjaxSettings>
       <telerik:AjaxSetting AjaxControlID="Button1">
            <UpdatedControls>
                  <telerik:AjaxUpdatedControl ControlID="Button1" LoadingPanelID="loading_tabs" />
            </UpdatedControls>
       </telerik:AjaxSetting>
   </AjaxSettings>
</telerik:RadAjaxManager>
<telerik:RadAjaxLoadingPanel ID="loading_tabs" runat="server" Width="256px" Height="64px"
IsSticky="true" MinDisplayTime="200" InitialDelayTime="250" Skin="Vista">
            <asp:Label ID="Label2" runat="server" ForeColor="Red">Loading... </asp:Label>
</telerik:RadAjaxLoadingPanel>
            <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />

Thanks,
Shinu

[Valera]

I have a little bit different setup, I use RadAjaxPanel instead of ajaxifying controls via RadAjaxManager.

Here is sample that demonstrates this bug (toggle between IsSticky true/false) to see the difference:

Page:

<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
    </telerik:RadScriptManager>
    <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="loading_tabs">
        <telerik:RadAjaxLoadingPanel ID="loading_tabs" runat="server" IsSticky="true" MinDisplayTime="3000">
            Loading ...
            <br />
        </telerik:RadAjaxLoadingPanel>
        <asp:Label ID="lbl_msg" runat="server" Text="Label"></asp:Label>
        <asp:Button ID="Button1" runat="server" Text="ShowDate" OnClick="btnClick" />
    </telerik:RadAjaxPanel>

Code:

protected void btnClick(object sender, EventArgs e)
        {
            System.Threading.Thread.Sleep(1000);
            lbl_msg.Text = DateTime.Now.ToString();
        }

[Genti]

Hi Valera,

In this case you should move the definition of the RadAjaxLoading panel outside the AjaxPanel.

The reason that you don't see loading panel any more even though that you have specified a minimum time is the following:
-When you click the button you initiate and ajax postback to the server.
-The server hangs for a second and then brings a response.
-When the response comes the RadAjaxPanel recreates all the controls inside it and eventually your going to lose the loading panel(this is the case If you set IsSticky to true, the panel will appear where you have set it in the WebForm)

Otherwise, if you have not set IsSticky to true, the loading panel is not rendered in the place where you define it, but rather outside the container. This way, on each response it wont get re-rendered.

Regards,

Genti
the Telerik team

[Bijoy Mohanta]

Hi Experts,

This is the solution of this issues. Please try it

<telerik:RadScriptManager
ID="RadScriptManager1" runat="server" AsyncPostBackTimeout="1200">
</telerik:RadScriptManager>

[Bijoy Mohanta]

<telerik:RadScriptManager ID="RadScriptManager1" runat="server" AsyncPostBackTimeout="1200">
</telerik:RadScriptManager>