原文:

资源文件内的属性能否直接通过绑定应用到控件？答案是肯定的。

比如，我们要直接把下面的<SolidColorBrush x:Key="RedBrush" Color="#FFFF0000" />直接绑定到一个TextBlock的Foreground属性。

<Application x:Class="StaticResourcesWithBinding.App"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    StartupUri="Window1.xaml">

    <Application.Resources>

<SolidColorBrush x:Key="RedBrush" Color="#FFFF0000" />

    </Application.Resources>

</Application>

办法是直接把资源文件内的Key的名字绑定到控件，

public class MyViewModel

{

public string MyResourceKey { get; private set; }

public MyViewModel(string myResourceKey)

{

MyResourceKey = myResourceKey;

}

}

直接绑定可以吗？

<Window x:Class="StaticResourcesWithBinding.Window1"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

   Title="Window1" Width="400" Height="200">

<Grid>

<TextBlock Text="Hello World" FontSize="48" Foreground="{StaticResource  {Binding MyResourceKey}}" />

</Grid>

</Window>

但这样是行不通的。

必须要用下面的类进行转换

using System;using System.Windows;using System.Windows.Data;using System.Windows.Markup;namespace StaticResourcesWithBinding{	public class BindableStaticResource : StaticResourceExtension	{		private static readonly DependencyProperty DummyProperty;		static BindableStaticResource()		{			DummyProperty = DependencyProperty.RegisterAttached("Dummy",																typeof(Object),																typeof(DependencyObject),																new UIPropertyMetadata(null));		}		public Binding MyBinding { get; set; }		public BindableStaticResource()		{		}		public BindableStaticResource(Binding binding)		{			MyBinding = binding;		}		public override object ProvideValue(IServiceProvider serviceProvider)		{			var target = (IProvideValueTarget)serviceProvider.GetService(typeof(IProvideValueTarget));			var targetObject = (FrameworkElement)target.TargetObject;			MyBinding.Source = targetObject.DataContext;			var DummyDO = new DependencyObject();			BindingOperations.SetBinding(DummyDO, DummyProperty, MyBinding);			ResourceKey = DummyDO.GetValue(DummyProperty);            return ResourceKey != null ? base.ProvideValue(serviceProvider) : null;		}        public new object ResourceKey        {            get            {                return base.ResourceKey;            }            set            {                if (value != null)                {                    base.ResourceKey = value;                }            }        }    }}

然后，我们就可以通过以下方式绑定了：

<Window x:Class="StaticResourcesWithBinding.Window1"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:StaticResourcesWithBinding="clr-namespace:StaticResourcesWithBinding"

    Title="Window1" Width="400" Height="200">

<Grid>

<TextBlock Text="Hello World" FontSize="48" Foreground="{StaticResourcesWithBinding:BindableStaticResource {Binding MyResourceKey}}" />

</Grid>

</Window>

后面的代码：

public partial class Window1

{

public Window1()

{

            this.DataContext = new MyViewModel("RedBrush");

InitializeComponent();

            

}

}

本文完整源码