BeginInvoke problem in Windows Service

[jubble]

I'm trying to convert a Windows Forms application to a Windows Service and am having problems with BeginInvoke with the error...

'Reference to a non-shared member requires an object reference'

 Dim ar As IAsyncResult = BeginInvoke(New ClearDataDelegate(AddressOf ClearData), o)
 EndInvoke(ar)

My understanding is that if BeginInvoke is called in a Windows Application without a control reference it will run on the thread that the form was created on. Is this correct?

How then can I use BeginInvoke in a Windows Service which has no UI?

Along the same vein, can anyone share some light on the best way to retrieve the thread that the Windows Service is running on?

 

[ThatRickGuy]

Along the same vein, can anyone share some light on the best way to retrieve the thread that the Windows Service is running on?

Try Threading.CurrentThread err is it Threading.Thread.CurrentThread. one of them.

Combining the error message, with what you said, I'm going to guess that the line causing the problem is in a shared method. You are correct that BeginInvoke runs on the same thread that is processing the form. BeginInvoke is a member of the form class, so if you don't specify frmMain.BeginInvoke, or Me.BeginInvoke, it uses what ever is instatiated from the current class (Me). But in your case, this being a shared method, you can't access Me. So if you want to use BeginInvoke you need to instantiate the form (you don't have to show it!) and call BeginInvoke from a non-shared sub.

-Rick

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