Updating a status label

I have a recently insalled the AJAX Beta 1 and I was wondering if it will enabled me to change a label multiple times in a sub... see the code below.

Protected Sub cmdSubmitUpload_Click(ByVal senderAs Object,ByVal eAs System.EventArgs)Handles cmdSubmitUpload.CliclblUploadStatus.Text ="Saving file on server..."'do the save herelblUploadStatus.Text ="Verifying file..."'call a routine that verifieslblUploadStatus.Text ="File verified."End Sub

I want to change the label and have the user see it change every time.  Is there a way to do this using AJAX?

Hello, the code that you write for an event handler will run on the server when the request is received, and the result of this is one and only one response that will update the page. If you want to provide this kind of feedback, you would need to write more client side code that executes each part of your process separately and can update the label before each step. You can seach msdn for a Whidbey feature called CallBacks that will allow you to do this, or you can make use of Atlas ability to call webservices from script.

Hope this helps,
Federico

Updating a website with data from an asynchronously called Webservice

Hi!

I wrote the following code to update a label on my aspx-page with data retrieved by an asynchronously called Webservice.

Protected Sub Page_Load(ByVal senderAs Object,ByVal eAs System.EventArgs)Handles Me.LoadIf Not Page.IsPostBackThen Dim wsAs localhost.WebServiceTest =New localhost.WebServiceTestDim ResultAs IAsyncResult = ws.Beginmessages(AddressOf renderResult, ws)End If End Sub Private Sub renderResult(ByVal ResultAs IAsyncResult)Dim wsAs localhost.WebServiceTest =CType(Result.AsyncState, localhost.WebServiceTest) Label1.Text = ws.Endmessages(Result)End Sub

The problem is that the Label (which is surrounded by an Updatepanel) does not get updated with the value returned by the Webservice although "renderResult" is executed correctly. (Maybe the problem is that the asynchronous function is called in a different thread on the webserver?)

Do you have any ideas or solutions to solve this issue?

Thank you

No suggestions?

Try doing your asynchronous webservice calls from the client-side rather than from the server.

http://www.asp.net/learn/ajax-videos/video-79.aspx

http://www.asp.net/AJAX/Documentation/Live/tutorials/ASPNETAJAXWebServicesTutorials.aspx

As DisturbedBuddha points out, you would probably want to do this sort of thing client side (remember the runat=server thing).

But, if youreally want to do this server side, my first question would be - is the updatepanel inside a form?

Cheers

Martin

Thank you for your help.

Calling the webservice client-side worked!