RadAjaxLoadingPanel not showing when javascript call postback on button

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Ajax AjaxLoadingPanel
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Vincent asked on 21 Apr 2022, 03:20 PM | edited on 21 Apr 2022, 03:21 PM

VS2022 /Framework 4.7.2 / Vb.net / WebSite / Telerik 2022.1.119.45

Context :

Page1 contains :

  • RadAjaxLoadingPanel Modal (Id=RALP)
  • RadAjaxPanel (Id= RAP1 associate to RALP)
  • 1 button to go Page2
  • 1 button to call a job (and after job, reload page with new elements)
  • and other things...

    Page2 contains :
  • forms and elements for a reunion.
  • return button to page1
  • valid button to update writting during reunion in database before run job. (Set session to say to refresh data to page1)

Page1, if i click on different buttons (including button for call job) and elements, is good i've got RadAjaxLoadingPanel 
Page2 to page1 by return button : Good
Page2 to page1 by valid button :  i've got problem with RadAjaxLoadingPanel :

simulate click button (see code), RadAjaxLoadingPanel not showing (user can click), after treatment content was refreshed. all elements clicked in page not display  RadAjaxLoadingPanel 

no javascript error in Chrome.

Code Behind :

Page1 :

Private Sub Planning_Load(sender As Object, e As EventArgs) Handles Me.Load
    If IsPostBack = False Then
            If Session("Planning_RunJob") = 1 Then
            End If
       '... other treatement
   End If
End Sub

Private Sub PrepareRunJob()

	Dim btRefresh as string = btJobOperation.UniqueID
	'Simulate click button for run run after page load, for user to inform is in update
	Dim sc As String = $"setInterval(__doPostBack('{btRefresh}',''), 10000);"
    ClientScript.RegisterStartupScript(Page.GetType, "refresh", $"{sc}", True)

End Sub

Private sub Runjob()

  'Simulate job
  litE4.Text = "REFRESHED !"

End Sub

Private Sub btJobOperation_Click(sender As Object, e As EventArgs) Handles btJobOperation.Click
End Sub
Thanks for your help !

1 Answer, 1 is accepted

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Attila Antal
Telerik team
answered on 26 Apr 2022, 08:11 AM

Hi Vincent,

Please make sure that you're not using both RadAjaxManager and RadAjaxPanel to enable AJAX requests for Controls. We have discussed this in the Controls Wrapped in AjaxPanel and Added to AjaxManager Settings article.

You must choose one or the other, but not both. Please give this a try and let me know if you still experience problems.

Attila Antal
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Ajax AjaxLoadingPanel
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Attila Antal
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