设置 .xaml 组件的资源 URI [英] Set resource URI of .xaml component

问题描述

我有一个名为 MyUserControl.xaml 的 .xaml UserControl，我想设置它的资源 URI.

默认情况下，WPF 会生成一个包含资源名称的 URI，该名称等于它所属的资源，例如

"/MyNamespace;component/myusercontrol.xaml"

对于名为 MyUserControl.xaml

的 .xaml

如何拥有 UserControl MyUserControl.xaml 并使 WPF 生成单个资源标识，例如

"/MyNamespace;component/myusercontrol_A.xaml" 或"/MyNamespace;component/myusercontrol_B.xaml" ?

其中:

解决方案

注意，

此文件生成一个字符串(资源定位符)，表示该 xaml 组件的路径，如下所示:

现在，如果您有同一程序集的多个版本，并且两个版本都包含相同的 xaml 文件，WPF 不知道要实例化哪个 xaml 文件，因为资源定位器仅引用程序集的名称，而不引用其版本.

这会导致 TargetInvocationException，即

<块引用>

{"组件 'MyNamespace.MyUserControl' 没有由 URI '/MyAssembly;comoponent/myusercontrol.xaml' 标识的资源"}

如下:

对此的简单(但绝对不明显)解决方案是将程序集版本添加到此资源定位器.这可以通过添加 -tag 修改项目的构建文件来实现，如下所示:

此致谢:

• 这个博客
• 此 SO 线程

I have a .xaml UserControl named MyUserControl.xaml and I want to set its resource URI.

Per default, WPF generates a URI that includes a resource name, which is equal to the resource it belongs to such as

"/MyNamespace;component/myusercontrol.xaml"

for the .xaml named MyUserControl.xaml

How can I have a UserControl MyUserControl.xaml and make WPF generate an individual resource identifies such as

"/MyNamespace;component/myusercontrol_A.xaml" or "/MyNamespace;component/myusercontrol_B.xaml" ?

The reason why I want to do that is described here.

In the image below you can see the resource identifier I am talking about:

and therein:

解决方案

Note, that that question is the origin of this question and might help to understand its background.

After a week suffering and laboring with this issue, I finally found both the reason for the problem and its solution.

The problem lies within the auto-generated *.g.i.cs file, which is called by the InitializeComponent() method of a UserControl, as seen by the following:

This file generates a string (a Resource Locator) that expresses the path to that xaml-component, as seen by the following:

Now, if you have multiple versions of the same assembly and both versions include the same xaml-file, WPF does not know what xaml-file to instantiate, because the Resource Locator only references the name of the assembly but not its version.

This results in a TargetInvocationException, saying that

{"The component 'MyNamespace.MyUserControl' does not have a resource identified by the URI '/MyAssembly;comoponent/myusercontrol.xaml'"}

as follows:

The simple (but most definitely not obvious) solution for this is to add the version of the assembly to this Resource Locator. This can be achieved by modifying the build-file of the project by adding the <AssemblyVersion>-tag as follows:

Credits for this go to:

• this blog
• this SO thread

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