Error - calling a class from aspx

i do not think you can invoke some winform namespace with asp.net


quote:Originally posted by sephib

Hi,

I have compiled the following code into a dll, (wich is instantiated by one empty sub) to be called from a web page. i create an object from the class and then call the sub (see code below). However I am getting an error ( see below), from my web search i think it is since i'm calling a window application from an aspx web form -

Code:

 
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click 
      On Error GoTo err 
      'Declare an instance of the object 
      Dim SC As New ChangeScene.ChangeScene 

      ' Invoke the  Method -: 
      SC.ChangeSceneSub()  ' THIS IS WHERE I GET THE ERROR 
      TextBoxResult.Text = "Sub DID  WORKed  !!!" 

err: 
      'if no success 
      TextBoxResult.Text = Err.Description 

  End Sub 



Code:
   Public Sub ChangeSceneSub() 
       ' Check if there is an arcScene license 
       Dim getExtension As Boolean = GetArcSceneLicense() 
       If (getExtension) Then ' if there is a license 
           pThisApp = GetApplicationFromDocument(SxdPath) 
           '[..] more code 
       End If 
   End Sub 


I think that the problem is in the following function inside the compiled dll - this must require to open an application window 

Code:
  Private Function GetApplicationFromDocument(ByVal sSXDFilename As String) As ESRI.ArcObjects.Sx.ISxApplication 
       On Error Resume Next 
       Dim pApp As ESRI.ArcObjects.Sx.ISxApplication 
       Dim pDoc As esriCore.IDocument 
       'get the sxd file - this calls an ArcScene application window to pop up 
        pSxDoc  = GetObject(sSXDFilename)   
        [...  more code...] 
       GetApplicationFromDocument = pApp 
   End Function 



THIS IS THE Error 
[Code] 
It is invalid to show a modal dialog or form when the application is not running in UserInteractive mode. Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application. 

Do you identify different problems. 
Do you have any ways to by pass this issue. 

Any comments on any above points would be greatly appreciated - 
THANK YOU AGAIN FOR YOU TIME , 

JB
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