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QuestionModal popup from web page during long processing task Pin
Member 1413757611-Mar-19 15:23
memberMember 1413757611-Mar-19 15:23 
I've been banging my head against what should be an incredibly trivial action -- popping up a "Please wait" dialog (with or without a progress indicator) while a long-running process happens from a System.Web.UI.Page object.

The basic launch is from a button handler routine in my code-behind:
Protected Sub GoBtn_Click(sender As Object, e As EventArgs)
        OpenPopup()
        DoMenuGeneration()
        GenerateStatusDivVisible = False
        ClosePopup()
    End Sub


DoMenuGeneration() is the long task, it launches an external application (twice even) and blocks until the process is complete.

OpenPopUp() and ClosePopup() have taken many forms, the most promising were AjaxToolkit-based functions fired by javascript using ScriptManager.RegisterStartupScript, but while those popups *can* be made to auto-magically pop up based on a client-side button on the page being clicked, I cannot mimic that click through the ScriptManager. I either get an error (cannot find the control) or simply nothing happens as the code line is executed.

The first attempts were the most simplistic, the "pop-up" is just a named DIV tag with runat=server, and I manipulate the Visible property. As far as I can tell, the page simply doesn't render in between, so making the DIV visible has zero effect.

I've tried at least three different "solutions" given on the web ... so far none have even come close to working properly. I have tried:


So far ... nothing has worked.

Thanks in advance!!
AnswerRe: Modal popup from web page during long processing task Pin
Richard Deeming12-Mar-19 2:48
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QuestionIs there an easy way into Razor, without necessarily adopting all of MVC to begin with? Pin
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