Question

当我对我的视力演播室表示许多具有约束力的错误时,例如这里的错误:

任何人都知道为什么发生这种情况? 地雷的同事也有这些具有约束力的错误,但与我一样。

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=PlanningCd; DataItem=null; target element is TextBlock (Name= planningSchema ); target property is NoTarget (type Object )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=PlanningCd; DataItem=null; target element is TextBlock (Name= planningSchema ); target property is Text (type String )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=Measurements; DataItem=null; target element is ItemsControl (Name= MeasurementAndTimeControl ); target property is ItemsSource (type IEnumerable )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=Foreground; DataItem=null; target element is ItemsControl (Name= MeasurementAndTimeControl ); target property is Foreground (type Brush )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=PlanningCd; DataItem=null; target element is TextBlock (Name= planningSchema ); target property is NoTarget (type Object )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=PlanningCd; DataItem=null; target element is TextBlock (Name= planningSchema ); target property is Text (type String )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=OtherParams; DataItem=null; target element is ItemsControl (Name= ); target property is ItemsSource (type IEnumerable )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=Foreground; DataItem=null; target element is ItemsControl (Name= ); target property is Foreground (type Brush )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=IsSelected; DataItem=null; target element is ContentPresenter (Name= ); target property is NoTarget (type Object )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=Foreground; DataItem=null; target element is Grid (Name= ); target property is Foreground (type Brush )

System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=Measurements; DataItem=null; target element is ItemsControl (Name= MeasurementAndTimeControl ); target property is ItemsSource (type IEnumerable )

Answer 1

如同许多错误一样,看上去是一个称为规划的内容。 Schema。首先,我要在这项具有约束力的文件中增加以下内容。您还可以随行一名真正的转变者,他们只是为了扼杀(或至今)。然后,你可以 de倒转手(或你可能发现,甚至没有变换)。如果小贩在XAML中工作的话,那将是空洞的。

    PresentationTraceSources.TraceLevel="High

Answer 2

地雷的同事也有这些具有约束力的错误,但与我一样。

您的同事可以在他的视觉演播室中以不同的方式确定一些事项:

Look in Tools > Options > Debugging > Output Window > WPF Trace Settings. Here you can set the level of debugging trace output (between Off and Verbose) and also set the subject matter of output, eg. Animation, Data Binding, etc.

如@Blam提到的那样,你也可以使用页: 1

进一步的变化可能是因为你可能拥有

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