是否有一个好的工具可以在运行时调试XAML的数据绑定行为/错误？ [英] Is there a good tool for debugging XAML's databinding behavior / errors at runtime?

问题描述

WPF是一个很好的工具集，XAML数据绑定功能非常强大，但是由于它的透明性，我经常遇到困难：在不引发任何错误的情况下调试数据绑定失败可能很困难。

WPF is a great toolset, and XAML databinding is very powerful, but I've often run into difficulty arising from its transparency: It can be tough to debug a databinding failure when no errors are thrown.

例如，我最近不得不更改 Style 声明，如下所示：

For example, I recently had to change a Style declaration like this:

<DataGrid.RowStyle>
    <Style>
        <Style.Triggers>
            <DataTrigger Binding="{Binding TestProperty}" Value="False">
                <Setter Property="DataGridRow.Background" Value="Red"/>
            </DataTrigger>
        </Style.Triggers>
    </Style>
</DataGrid.RowStyle>

到此：

<DataGrid.RowStyle>
    <Style>
        <Style.Triggers>
            <DataTrigger Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=DataContext.TestProperty}" Value="False">
                <Setter Property="DataGridRow.Background" Value="Red"/>
            </DataTrigger>
        </Style.Triggers>
    </Style>
</DataGrid.RowStyle>

为了影响DataGridRow属性。在设计或运行时查看绑定到不同源和 RelativeSource 的含义将是非常有用的。

In order for the DataGridRow property to be affected. It would be incredibly helpful to see, at design- or run-time, what the implications of binding to different sources and RelativeSources would be.

是否存在任何此类工具/技术？

Do any such tools / techniques exist?

推荐答案

您可以使用 PresentationTraceSources.TraceLevel 绑定的附加属性，以在运行时在输出中获得详细的日志记录。

You can use PresentationTraceSources.TraceLevel attached property on bindings to get detailed logging in the output during runtime.

在您的情况下，它看起来像这样：

In your case, it will look like this:

<DataGrid.RowStyle>
    <Style>
        <Style.Triggers>
            <DataTrigger Value="False" Binding="{Binding DataContext.TestProperty,
                    RelativeSource={RelativeSource AncestorType=UserControl},
                    PresentationTraceSources.TraceLevel=High}">
                <Setter Property="DataGridRow.Background" Value="Red"/>
            </DataTrigger>
        </Style.Triggers>
    </Style>
</DataGrid.RowStyle>

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