Question

I am running this code in a seperate thread on my C# Winforms app (the name of my form is MainForm):

DisplayDownload form2 = new DisplayDownload();

form2.TopMost = true;  
form2.Show();

But when the thread is launched, the form never opens. If I move the code onto the main thread of my app, it opens fine, but if I launch it as it’s own thread, the form never opens.

I tried using the accepted answer from this post: Calling a windows form from another thread (.Net) but I get this error:

Cannot convert anonymous method to type ‘System.Delegate’ because it is not a delegate type

Here is the code I am trying to utilize:

MainForm.Invoke(delegate {
         DisplayDownload form2 = new DisplayDownload();


         form2.TopMost = true; 
         form2.Show();
});

Can someone please tell me what I am doing wrong and how to get it to work?

Answer 1

Add new MethodInvoker(delegate(), So:

MainForm.Invoke(new MethodInvoker(delegate() 
{
             DisplayDownload form2 = new DisplayDownload();


             form2.TopMost = true; 
             form2.Show();
}));