Question

I’m using the following code to open a new form (that is for user input) in my function:

Form4 f4 = new Form4();
f4.mainform = this;
f4.get_Text(matchString);
f4.ShowDialog();

It’s working perfectly when not threading, but when I try to run the function on two threads I only get 1 form popup. How can I adjust it so that it will support more than one thread?

Answer 1

You can open a form from any thread, you just need to start a message loop on the new thread, such as:

Application.Run(f4)

The Run method will not return until the form is closed. It can cause issues, though, so you need to be careful and know what you are doing. Unless it’s a real pain to do, I would sooner consider redesigning your code to be more asynchronous. For instance, you could create a event handler method to listen for the form’s closing event.