Question

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Cross-thread operation not valid: Control accessed from a thread other than the thread it was created on

Okay, I know why this is giving me this error:

Cross-thread operation not valid:
Control ‘Form1’ accessed from a thread
other than the thread it was created
on.

But… How can I make this workable?

System.Threading.Thread t = new System.Threading.Thread(()=>
{
   // do really hard work and then...
   listView1.Items.Add(lots of items);
   lots more UI work
});
t.Start();

I don’t care when, or how the Thread finishes, so I don’t really care about anything fancy or over complicated atm, unless it’ll make things much easier when working with the UI in a new Thread.

Answer 1

You can’t. UI operations must be performed on the owning thread. Period.

What you could do, is create all those items on a child thread, then call Control.Invoke and do your databinding there.

Or use a BackgroundWorker

    BackgroundWorker bw = new BackgroundWorker();
    bw.DoWork += (s, e) => { /* create items */ };
    bw.RunWorkerCompleted += (s, e) => { /* databind UI element*/ };

    bw.RunWorkerAsync();