c# Threading hell (should be simple)

[rsagona1]

Hi,
I *really* need some help, please. I've been researching for hours about how to invoke methods 'safely', but I just can't do it. EVERY, and I mean every, method I've found throws an error.

First, making the thread is easy:

private void btnStart()
{

   Thread scanThread = new Thread(new ThreadStart(startScan));
     scanThread.Start();
}

No problem there. Next, here is the startScan() method that gets its own thread (on scanThread)

private void startScan()
{
 //lots of code
 //lots of code

 addToPortfolio(q);
}

Now, addToPortfolio() gives me the trouble. Essentially it just takes 'q' (which is a custom type) and adds it to a listview

private void addToPortfolio(Quote q)
{
  listview1.items.add(q.Price);
  listview1.items.add(q.Volume);
}

Of course, I get the cross thread exception. No problem, I'll try to invoke it:

   private void addPortfolio(Quote q)
        {

            if (InvokeRequired)
            {
                this.Invoke(delegateAddPortfolio(q));
                
            }
               
            
        }

And of course, the delegate sub is:

  private delegate void delegateAddPortfolio(Quote q)
        {
           //listview code here
}

But it doesn't like the 'delegate' word, it throws over 100 errors!

If I remove the delegate word, then I get this error:

Argument '1': cannot convert from 'void' to 'System.Delegate'

Please, someone just get this working for me. Can someone please assist me?

P.S. , I've tried this too!

 this.Invoke(delegateAddPortfolio, new object [] {q});

Then I get "Argument '1': cannot convert from 'method group' to 'System.Delegate'"

Thank you so much.

[dannystommen]

try

private delegate void delegateAddPortfolio(Quote q);
private void addToPortfolio(Quote q)
{
  if (this.InvokeRequired){
    this.Invoke(new delegateAddPortfolio(addToPortfolio), q);
  }
  else{
    listview1.items.add(q.Price);
    listview1.items.add(q.Volume);
  }
}

[rsagona1]

You...are..the..man!! THANK YOU!!! You just saved me a ton of time and money.