Execute simple Logic without “locking” the UI

Question

I have a dialog with some txb\'s and a button. When this button is clicked I want to change the button\'s Text, disable the button, start some Logic and then close the Window.

Answer 1

You could use a backgroundworker:

BackgroundWorker worker = new BackgroundWorker();
worker.WorkerSupportsCancellation = false;
worker.WorkerReportsProgress = false;

worker.DoWork += (s, e) =>
    {
        //perform action
    };

worker.RunWorkerCompleted += (s, e) =>
    {
        //close window
    };

worker.RunWorkerAsync();

See this for more details.

Answer 2

You can have a thread that performs the calculation. This may help: Threads in CSharp

Answer 3

Here's what I would do:

private async void ButtonClick() 
{
    //here, you're on the UI Thread
    button1.Enabled = false;

    await Task.Run(() => DoTheWork());

    //you're back on the UI Thread
    button1.Enabled = true;
}

private void DoTheWork() 
{
    //this will be executed on a different Thread
}

Answer 4

when button is clicked:

button.Enabled = false;
button.Text = "new text";
Task.Factory.StartNew(() =>
{
    // do your tasks here and close the window.
    // type your code normally like calling methods. setting variables etc...

    StaticVariable = ExampleUsingMethod();
});

if your variable needs to be assigned to UI later then you need dispatcher.for example if you want to change button inside the new thread.

Task.Factory.StartNew(() =>
{
       Dispatcher.Invoke(() => 
       {
          button.Enabled = false;
          button.Text = "new text";
       }

       StaticVariable = ExampleUsingMethod();
});