绑定到另一个命名空间中的属性? [英] Binding to a property in another namespace?

问题描述

我在主题 xaml 文件中有一个样式设置器.我正在尝试将 Setter 的值绑定到视图模型中的 bool peoperty.

I've got a style setter in a themes xaml file. I'm trying to bind the value of the Setter to a bool peoperty in a view model.

我在主题中获得了视图模型的命名空间:

I've got the namespace to the view model in themes:

 xmlns:propertyGrid="clr-namespace:MY.App.Controls.PropertyGrid;assembly=MY.APP.Controls"

和样式中的绑定:

<Setter Property="IsExpanded" Value="{Binding Source={StaticResource propertyGrid:PropertyGridViewModel}, Path=AreCategoriesAutoExpanded}"/>

最后在视图模型中我只有一个 auto 属性:

Finally in the viewmodel I just have an auto property:

public bool AreCategoriesAutoExpanded { get; set; }

但是我在运行时遇到异常:

However I get an exception at run time:

Cannot find resource named 'propertyGrid:PropertyGridViewModel'. Resource names are case sensitive

如果我尝试使用动态资源资源，它会说明我只能绑定到 dp.这种绑定有什么问题?有什么我遗漏的吗?

If I try to use a dynamic resource resource it compains that I can only bind to a dp. What is wrong with this binding? Is there something I'm missing?

推荐答案

这仅在您的 ViewModel 是具有静态属性的静态类时才有效，如下所示:

This will only work if your ViewModel is a static class with a static property, like this:

<Setter Property="IsExpanded" Value="{Binding Source={x:Static propertyGrid:PropertyGridViewModel.AreCategoriesAutoExpanded}"/>

您错过了 'x:Static' 位，应该可以修复它.

You were missing the 'x:Static' bit, which should fix it.

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