WPF绑定警告

Question

全部，我在“输出”窗口中看到以下“绑定警告”。 有人可以在这里解释绑定的问题吗。 我在ViewModel中为ProgressValue设置了多个值。 但是，如下所示，“ ProgressValue”仅将最终值设置为100。

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'

我的代码如下所示。 它在Styles.xaml中定义。

<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}"
             />

在我的视图模型中，我更新值，如下所示。

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

Answer 1

BradleyDotNET是正确的。

您已将PresentationTraceSources.TraceLevel设置为“高”。 这将导致打印有关绑定的一堆信息。

MSDN上PresentationTraceSources.TraceLevel