How do I popup a window from server side?

[Eric]

I suspect it might be a stupid question but I am rather beginning with both ASP.Net AJAX and Telerik...

In the online documentation, I can find lots of examples of popups triggered from the cloient side but not from the server side...

I would like to report to the User errors happening at the server side.
One way I was thinking of doing that was to have a popup window closed to start with.
When an error is caught

• I store it in the database, get a key back
• change the NavigateUrl of my popup to a page with the error key passed on the url
• make the popup visible in modal mode

Everything seems fine but I don't know how to make my popup window... pop up!


Thanks


Eric

[Princy]

Hi

Try using  the RadWindow's VisibleOnPageLoad property and set it to true in the button' s server handler as shown below to
popup a window from server side

WindowManager.Windows[0].VisibleOnPageLoad = true;

-Princy.

[Georgi Tunev]

Hi Eric,

You can see how to do this in this documentation topic. Here are the basics steps:

'Create a new window add it dynamically
    'The window will inherit the default settings of parent WindowManager
    Dim newWindow As New Telerik.Web.UI.RadWindow()
    'set its NavigateUrl property
    newWindow.NavigateUrl = "http://www.sitefinity.com"
    'add other properties, like modal, width, height, etc.
    newWindow.Modal = true
    newWindow.Width = Unit.Pixel(420)
    newWindow.Height = Unit.Pixel(220)
    'set its VisibleOnPageLoad property to show the Window
    newWindow.VisibleOnPageLoad = true
    'OPTION 1
    'Add the newly created RadWindow to the RadWindowManager's collection
    'WindowManager.Windows.Add(newWindow)
    'OPTION 2
    'since in the for ASP.NET AJAX version you can have a RadWindow outside of a RadWindowManager
    'as a separate control, you can add the newly created RadWindow directly to the form's Controls collection
    form1.Controls.Add(newWindow)

Greetings,
Georgi Tunev
the Telerik team

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[Eric]

Princy, Georgi,

Thanks for your answers. I think I understand it would be fine if I postback my page.

What about background update, like opening a node in a big treeview that happens in the background.

I was thinking about having a window prepared but hidden on the front end and I was trying to think about a way to populate that window and make it visible.
I suppose I could use radalert(...). I saw this article about firing radalert from the client but the comments are ambiguous. I'll try option 2 and tell you how I am doing. :-)

Eric

[Georgi Tunev]

OK Eric,

Let us know how this goes. If you face any problems, it will be best to open a support ticket and send us your implementation so we can work directly on it.


Best wishes,
Georgi Tunev
the Telerik team

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Check out the tips for optimizing your support resource searches.

[Eric]

Well, it was not going too well...
In an UpdatePanel update, there was nothing showing up.
In a Postback, I ended up with a javascript error message saying raderlert was not defined.
I guess you could have sorted that but it would not really help because I don't have a problem with full posts.

Now, I am looking at the possibility to "hide" an UpdatePanel with UpdateMode "Always".

In theory, I suppose I should be able to interact more easily that way.
Still working on it...

I'll post my result or questions if I don't get anywhere
:-)

[Eric]

I ended up using a User Control that contains a simple asp:Panel

It's not "sexy" but it will do the job for the time being...