WPF绑定警告

Question

All, I see below Binding warnings in my Output window. Can some one please explain what is the issue with Binding here. I set several values to ProgressValue' in my ViewModel. But only final value of 100 is set for 'ProgressValue' as shown below.

System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 95 : BindingExpression (hash=58496944): Got PropertyChanged event from ExportControls (hash=6385044)
System.Windows.Data Warning: 101 : BindingExpression (hash=58496944): GetValue at level 0 from ExportControls (hash=6385044) using RuntimePropertyInfo(ProgressValue): '100'
System.Windows.Data Warning: 80 : BindingExpression (hash=58496944): TransferValue - got raw value '100'
System.Windows.Data Warning: 89 : BindingExpression (hash=58496944): TransferValue - using final value '100'

My code is shown below. It's defined in Styles.xaml.

<ProgressBar IsIndeterminate="False" 
             Value="{Binding ProgressValue, 
                     UpdateSourceTrigger=PropertyChanged, 
                     Mode=TwoWay, 
                     diag:PresentationTraceSources.TraceLevel=High}"
             x:Name="ExportProgressBar"
             Visibility="Collapsed"
             VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
             Background="Transparent"
             BorderThickness="0"
             Foreground="{StaticResource HighlightBlueBrush}"
             />

In my View Model, I update the value as shown below.

                Dispatcher.CurrentDispatcher.Invoke(new Action(() =>
                {
                    export.ProgressValue = pMeter;
                }));

Answer 1

BradleyDotNET is right.

You've got PresentationTraceSources.TraceLevel set to High. That will cause a bunch of information to print regarding the binding.

MSDN on PresentationTraceSources.TraceLevel