Creating a modal dialog in another thread

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C#

GUI

Hello everyone,

I need to create an modal dialog box that shows some custom progress information. However, I need to do it in a thread while the caller keeps doing its job.

I created a simple BackgroundWorker based class which owns and creates the dialog. It works fine but I am unable to make the dialog modal to my application. I am guessing this is because it is owned and managed by another thread. I was wondering if there is a way to get around this.

The main bits of code is as follows:

public class ProgressDialogThread : BackgroundWorker
{        
  public ProgressDialogThread()
  {}
  protected override void OnDoWork(DoWorkEventArgs e)
  {
     // myForm is my Winform
     myForm.ShowDialog();         
  }
}

And I can simply call this as:

ProgressDialogThread pdt = new ProgressDialogThread();
pdt.RunWorkerAsync();

As I said, the dialog shows and everything else is fine besides this modality issue.

I would greatly appreciate any help someone can give me.

Many thanks,

Keith