Making a progress bar update in real time in wpf

Question

I\'m having some trouble making the progress bar show the updates in real time.

This is my code right now

for (int i = 0; i < 100; i++)
{
     pr         


        

Answer 1

If you are using .NET 4.5 or later, you can use async/await:

var progress = new Progress<int>(value => progressBar.Value = value);
await Task.Run(() =>
{
    for (int i = 0; i < 100; i++)
    {
        ((IProgress<int>)progress).Report(i);
        Thread.Sleep(100);
    }
});

You need to mark your method with async keyword to be able to use await, for example:

private async void Button_Click(object sender, RoutedEventArgs e)

Answer 2

You should use BackgroundWorker included in .NET, which provides you with methods for reporting the progress of a background thread in an event. The thread which created the BackGroundWorker automatically calls this event.

The BackgroundWorker.ProgressChanged can be used to report the progress of an asynchronous operation to the user.

// This event handler updates the progress bar. 
private void backgroundWorker1_ProgressChanged(object sender,
    ProgressChangedEventArgs e)
{
    this.progressBar1.Value = e.ProgressPercentage;
}

Refer to MSDN for more information about using this.

Answer 3

Managed to make it work. All I needed to do is instead of making it just

progressBar1.value = i;

I just had to do

progressbar1.Dispatcher.Invoke(() => progressbar1.Value = i, DispatcherPriority.Background);