ProgressBar Visibilty doesn't change

Question

I want that progress bar will appear then login progress will start, so i code these for click event;

private void btnSignIn_Click(object sender, RoutedEventArgs e)
{
    customClasses.LogIn logIn = new customClasses.LogIn(txtLoginUsername.Text, pswdLoginPassword.Password, this);
    Dispatcher.BeginInvoke(new ThreadStart(() => otherMethods.enableProgressBar(prgLoginLoading)));
    Dispatcher.BeginInvoke(new ThreadStart(() => logIn.SignIn()));
}

This is inside of enableProgressBar

public static void enableProgressBar(ProgressBar bar)
{
    bar.Visibility = Visibility.Visible;
}

So this is my progressbar XAML

<ProgressBar x:Name="prgLoginLoading" Grid.Column="1" Grid.Row="3" Margin="14" IsIndeterminate="True" Visibility="Hidden"/>

But it didn't work when i debug code ProgressBar Visibility properties is still Hidden. How can i fix that?

You could try using `Action` instead of `ThreadStart`, which seems a bit weird. This might also be helpful: [Dispatcher BeginInvoke Syntax](https://stackoverflow.com/questions/3760777/dispatcher-begininvoke-syntax). — Theodor Zoulias, May 09 '21 at 21:48
A proper approach would be to use `IProgress` along visual states. — aybe, May 09 '21 at 22:18

score 0 · Answer 1 · answered May 10 '21 at 12:42

Change enableProgressBar to below

    Dispatcher.BeginInvoke(new Action(delegate ()
    {
          bar.Visibility = Visibility.Visible;
    }));

Change

Dispatcher.BeginInvoke(new ThreadStart(() => otherMethods.enableProgressBar(prgLoginLoading)));

to

otherMethods.enableProgressBar(prgLoginLoading);

ProgressBar Visibilty doesn't change

1 Answers1