如何与动态资源绑定并指定路径 [英] How to bind with dynamic resource and specifying a path

问题描述

我想绑定到资源(DynamicResource)并访问该资源的属性，但是有办法吗?

I want to bind to a resource (DynamicResource) and access properties on that resource, but is there a way to do that?

(我想在Visual Studio的xaml编辑器中可视化来自构造函数的默认值.当通过DataContext或通过我的Window类添加的属性引用对象时，无法看到这些默认值.)

(I want to visualize the default values from constructor in the xaml editor in visual studio. Those cannot be seen when referencing an object through DataContext nor through a property added on my Window class...)

无法使用xaml:(在composer中有效，但在运行时不起作用...)

Not working xaml: (works in composer but not at runtime...)

<Window ... >
    <Window.Resources>
        <local:MyClass x:Key="myResource"  />
    </Window.Resources>
    <StackPanel>
        <Button Content="{Binding Source={DynamicResource myResource} Path=Property1}" />
        <Button Content="{Binding Source={DynamicResource myResource} Path=Property2}" />
    </StackPanel>
</Window>

使用该类(可能需要实现INotifyPropertyChanged):

with the class (which probably need to implement INotifyPropertyChanged):

public class MyClass 
{
    public MyClass()
    {
        this.Property1 = "Ok";
        this.Property2 = "Cancel";
    }
    public string Property1 { get; set; }
    public string Property2 { get; set; }
}

推荐答案

这是因为DynamicResource标记扩展名只能用于依赖项属性，因为如果资源发生更改，它将需要对其进行更新.而且Binding.Source不是依赖项属性...

That's because the DynamicResource markup extension can only be used on a dependency property, because it will need to update it if the resource changes. And Binding.Source is not a dependency property...

作为解决方法，您可以使用DynamicResource设置按钮的DataContext:

As a workaround, you could set the DataContext of the button with the DynamicResource :

<Button DataContext="{DynamicResource myResource}" Content="{Binding Path=Property1}" />
<Button DataContext="{DynamicResource myResource}" Content="{Binding Path=Property2}" />

这篇关于如何与动态资源绑定并指定路径的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！