Avoid calling Invoke when the control is disposed

Question

I have the following code in my worker thread (ImageListView below is derived from Control):

if (mImageListView != null &&          


        

Answer 1

Try using

if(!myControl.Disposing)
    ; // invoke here

I had the exact same problem as you. Ever since I switched to checking .Disposing on the control, the ObjectDisposedException has gone away. Not saying this will fix it 100% of the time, just 99% ;) There is still a chance of a race condition between the check to Disposing and the call to invoke, but in the testing I've done I haven't ran into it (I use the ThreadPool and a worker thread).

Here's what I use before each call to invoke:

    private bool IsControlValid(Control myControl)
    {
        if (myControl == null) return false;
        if (myControl.IsDisposed) return false;
        if (myControl.Disposing) return false;
        if (!myControl.IsHandleCreated) return false;
        if (AbortThread) return false; // the signal to the thread to stop processing
        return true;
    }

Answer 2

This works for me

if (this.IsHandleCreated){
    Task.Delay(500).ContinueWith(_ =>{
        this.Invoke(fm2);
    });
} else {
  this.Refresh();
}