Problem with binding

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I'm having a problem with binding values to controls. I checked in other windows I have and I think I'm doing it the same way.
I want to show something like loading window from App before main window will open.

InitizalizationWindow:

C#

public InitializationWindow()
{
            ...
            InitializationWindowClass.Progress = new InitializationWindowClass();
            this.mainSP.DataContext = InitializationWindowClass.Progress;
}

and part of xaml:

C#

<StackPanel Name="mainSP" HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Margin="0, 0, 0, 10">
        <TextBlock x:Name="tblProgress" FontSize="14" Text="{Binding ProgressText}" TextAlignment="Center" TextWrapping="Wrap" />
        <Grid>
                <telerik:RadProgressBar x:Name="progress" Value="{Binding ProgressValue}" telerik:StyleManager.Theme="Summer" Height="25" IsIndeterminate="False" />
                <Label x:Name="lblPercent" FontWeight="Bold" Content="{Binding ProgressValueString}" HorizontalAlignment="Center" VerticalContentAlignment="Center" />
        </Grid>
</StackPanel>

InitializationWindowClass:

C#

public class InitializationWindowClass : INotifyPropertyChanged
    {
        public static InitializationWindowClass Progress { get; set; }
        private string progressText = String.Empty, progressValueString = String.Empty;
        private int progressValue = 0;
        public event PropertyChangedEventHandler PropertyChanged;

        public string ProgressText
        {
            get
            {
                return progressText;
            }
            set
            {
                progressText = value;
                NotifyPropertyChanged("ProgressText");
            }
        }

        public string ProgressValueString
        {
            get
            {
                return progressValueString;
            }
            set
            {
                progressValueString = value;
                NotifyPropertyChanged("ProgressValueString");
            }
        }

        public int ProgressValue
        {
            get
            {
                return progressValue;
            }
            set
            {
                progressValue = value;
                ProgressValueString = String.Format("{0}%", progressValue);
                NotifyPropertyChanged("ProgressValue");
                NotifyPropertyChanged("ProgressValueString");
            }
        }

        private void NotifyPropertyChanged(String propertyName)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }

and part of App.xaml.cs:

C#

protected override void OnStartup(StartupEventArgs e)
{
    InitializationWindow iw = new InitializationWindow(); 
    iw.Show();
    InitializationWindowClass.Progress.ProgressValue = Convert.ToInt32(((decimal)count / (decimal)sum) * 100);
    InitializationWindowClass.Progress.ProgressText = "Some text";
    ...
    ...
    InitializationWindowClass.Progress.ProgressValue = Convert.ToInt32(((decimal)count / (decimal)sum) * 100);
    InitializationWindowClass.Progress.ProgressText = "New text";
    ...
    ...
}

I checked and when I'm changing i.e. ProgressValue from App.xaml.cs, the value is changing - going to

C#

get
{
    return progressValue;
}

So the question is - what I'm doing wrong?

Posted 15-Jan-15 0:18am

Cudak

Updated 15-Jan-15 3:07am

v3

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Comments

Leo Chapiro 15-Jan-15 8:16am

And what is the problem / error?

Cudak 15-Jan-15 8:23am

nothing is changing (text/content/value of control)

TheRealSteveJudge 15-Jan-15 9:10am

I assume your application is blocked until the OnStartup has finished.
When you have only one assignment of ProgressValue resp. ProgressText
the value is shown.

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TheRealSteveJudge · Answer 1 · 2015-01-15T03:20:00

Please try the app.xaml.cs below.

ProgressBar is growing and value is shown.

So your OnStartup method blocked the UI thread.

It is not a data binding problem.

C#

public partial class App : Application
  {
      public App()
      {
          this.Startup += App_Startup;
      }

      void App_Startup(object sender, StartupEventArgs e)
      {
          InitializationWindow iw = new InitializationWindow();
          iw.Show();

          Task task = new Task(Test);
          task.Start();
      }

      void Test()
      {
          for (int i = 0; i <= 100; i++)
          {
              InitializationWindowClass.Progress.ProgressValue = Convert.ToInt32(((decimal)i / (decimal)100) * 100);
              InitializationWindowClass.Progress.ProgressText = "Some text";

              Thread.Sleep(100);
          }
      }
}