WPF不适用于MergedDictionaries定义的默认样式？ [英] WPF not applying default styles defined in MergedDictionaries?

问题描述

在一个WPF应用程序，我定义在单独的资源字典默认控件样式（如ButtonStyle.xaml），并增加它们作为合并词典名为ResDictionary.xaml资源字典

如果我指的这个ResDictionary.xaml作为合并词典在我App.xaml中，默认的样式不适用。但是，如果我提到了ButtonStyle.xaml，它工作正常。

如果我重新编译相同的code。在.NET 3.5或3.0，它承认并应用到ResDictionary.xaml中提到的App.xaml中默认样式，而不是在.NET 4.0中。

在运行时，如果我签了Application.Current.Resources字典，默认样式是有的，但他们不适用，只有当我在Button控件显式地指定样式属性。

是否有任何解决方案，是指资源字典（containig默认样式），这种方式在.NET 4.0中？

---

App.xaml中：

 ＆LT; Application.Resources＆GT;
  ＆LT;的ResourceDictionary＆GT;
    ＆LT; ResourceDictionary.MergedDictionaries＆GT;
      ＆LT; ResourceDictionary中源=样式/ ResDictionary.xaml/＆GT;
    ＆LT; /ResourceDictionary.MergedDictionaries>
  ＆LT; / ResourceDictionary中＆GT;
＆LT; /Application.Resources>
 

ResDictionary.xaml：

 ＆LT; ResourceDictionary中的xmlns =htt​​p://schemas.microsoft.com/winfx/2006/xaml/$p$psentation
                    的xmlns：X =htt​​p://schemas.microsoft.com/winfx/2006/xaml＆GT;
    ＆LT; ResourceDictionary.MergedDictionaries＆GT;
        ＆LT; ResourceDictionary中源=默认/ ButtonStyle.xaml/＆GT;
    ＆LT; /ResourceDictionary.MergedDictionaries>
＆LT; / ResourceDictionary中＆GT;
 

ButtonStyle.xaml：

 ＆LT; ResourceDictionary中的xmlns =htt​​p://schemas.microsoft.com/winfx/2006/xaml/$p$psentation
                    的xmlns：X =htt​​p://schemas.microsoft.com/winfx/2006/xaml＆GT;
    ＆LT;风格的TargetType =按钮＆GT;
        ＆LT; setter属性=背景VALUE =黄色/＆GT;
    ＆LT; /样式和GT;
＆LT; / ResourceDictionary中＆GT;
 

解决方案

有一个修复这个排序的，但我只能够使它在窗口的水平（而不是应用程序级别）的工作。

为了包括来自一个单独的项目一个WPF 4.0的资源，该资源必须添加为在窗口的的$ C $后面℃的资源。该声明属于窗口的构造，之前InitializeComponent方法调用：

 公共ControlsWindow（）
{
    this.Resources = Application.LoadComponent（新的URI（[WPF 4.0 ResourceProjectName];组件/ [在项目目录和文件名]，UriKind.Relative））为ResourceDictionary中;
    的InitializeComponent（）;
}
 

请注意：更换[WPF 4.0 ResourceProjectName]你的资源的项目名称的文本。此外，[在项目目录和文件名]需要更换的资源文件的相对位置（如主题/ StandardTheme.xaml'）

我进入更详细信息有关此问题的这里。

In a WPF application I defined default control styles in separate resource dictionaries (e.g. "ButtonStyle.xaml"), and added them as merged dictionaries to a resource dictionary named "ResDictionary.xaml".

If I refer this "ResDictionary.xaml" as merged dictionary in my App.xaml, the default styles are not applied. However, if I refer the "ButtonStyle.xaml", it works correctly.

If I recompile the same code in .NET 3.5 or 3.0, it recognizes and applies the default styles referred in "App.xaml" through "ResDictionary.xaml", but not in .NET 4.0.

At runtime if I check the Application.Current.Resources dictionary, the default styles are there, but they are not applied, only if I specify the Style property explicitly in the Button control.

Are there any solutions to refer a resource dictionary (containig default styles) this way in .NET 4.0?

---

App.xaml:

<Application.Resources>
  <ResourceDictionary>
    <ResourceDictionary.MergedDictionaries>
      <ResourceDictionary Source="Styles/ResDictionary.xaml"/>
    </ResourceDictionary.MergedDictionaries>
  </ResourceDictionary>
</Application.Resources>

ResDictionary.xaml:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="Default/ButtonStyle.xaml"/>
    </ResourceDictionary.MergedDictionaries>
</ResourceDictionary>

ButtonStyle.xaml:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style TargetType="Button">
        <Setter Property="Background" Value="Yellow"/>
    </Style>
</ResourceDictionary>

解决方案

There is a sort-of fix for this, but I’ve only been able to make it work at the window level (not the application level).

In order to include a WPF 4.0 resource from a separate project, the resource must be added as a resource in the window’s code behind. The statement belongs in the window’s constructor, prior to the InitializeComponent method call:

public ControlsWindow()
{
    this.Resources = Application.LoadComponent(new Uri("[WPF 4.0 ResourceProjectName];Component/[Directory and File Name within project]", UriKind.Relative)) as ResourceDictionary;
    InitializeComponent();
}

Note: Replace the '[WPF 4.0 ResourceProjectName]' text with your resource's project name. Also, the '[Directory and File Name within project]' needs to be replaced with the relative location of the resource file (like 'Themes/StandardTheme.xaml')

I go into more details about this issue here.

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