Question

我在包含颜色和画笔的WPF类库中定义了一个Reource Dictionary，名为BrushResources.xaml。

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Lots of Colors and Brushes here>
</ResourceDictionary>

我想在另一个程序集的代码中使用一些Brushes，它引用了这个库项目。如何获得ResourceDictionary的实例？

Answer 1

您所询问的是在应用程序中提供真正皮肤所需功能的组件。从单独的程序集中获取资源涉及从另一个程序集中读取已编译的XAML或BAML。这是我在skinning库中使用的方法，用于从程序集中检索BAML：

//Relevant Namespaces:
//using System.Windows.Baml2006;
//using System.Xaml;

public static List<Stream> GetBamlStreams(AssemblyName skinAssemblyName) 
{ 
    List<Stream> bamlStreams = new List<Stream>(); 
    Assembly skinAssembly = Assembly.Load(skinAssemblyName); 
    string[] resourceDictionaries = skinAssembly.GetManifestResourceNames(); 
    foreach (string resourceName in resourceDictionaries) 
    { 
        ManifestResourceInfo info = skinAssembly.GetManifestResourceInfo(resourceName); 
        if (info.ResourceLocation != ResourceLocation.ContainedInAnotherAssembly) 
        { 
            Stream resourceStream = skinAssembly.GetManifestResourceStream(resourceName); 
            using (ResourceReader reader = new ResourceReader(resourceStream)) 
            { 
                foreach (DictionaryEntry entry in reader) 
                { 
                    //TODO: Figure out if this is a ResourceDictionary I care about
                    //Key will be name of the RD (BrushResources.baml, in your case)
                    if (IsRelevantResource(entry)) 
                    { 
                         bamlStreams.Add(entry.Value as Stream); 
                    } 
                } 
            } 
        } 
    } 
    return bamlStreams; 
}

然后，要将BAML转换为特定资源，请执行以下操作：

//If .NET 3.5, need this initialization:
//Type xamlType = typeof(System.Windows.Markup.XamlReader);
//LoadBamlMethod = xamlType.GetMethod(LOAD_BAML_METHOD, BindingFlags.NonPublic | BindingFlags.Static);

public static T LoadBaml<T>(Stream stream) 
{ 
    //For .net 3.5: 
    //ParserContext parserContext = new ParserContext(); 
    //object[] parameters = new object[] { stream, parserContext, null, false }; 
    //object bamlRoot = LoadBamlMethod.Invoke(null, parameters); 
    //return (T)bamlRoot; 

    //For .net 4.0
    var reader = new Baml2006Reader(stream); 
    var writer = new XamlObjectWriter(reader.SchemaContext); 
    while (reader.Read()) 
            writer.WriteNode(reader); 
    return (T)writer.Result; 
}

为了将其他程序集中的资源合并到当前程序集中：

private void LoadResources() 
{ 
    List<Stream> bamlStreams = GetBamlStreams(FullName); 
    foreach (Stream stream in bamlStreams) 
    { 
        ResourceDictionary rd = LoadBaml<ResourceDictionary>(stream);
        Application.Current.Resources.MergedDictionaries.Add(rd)
    } 
}

此示例以非常通用的方式为蒙皮目的进行工作，但您可以简化此操作以在必要时实现您的特定目标。您可以看到使用此方法here on github的皮肤库，并举几个示例进行演示。

Answer 2

您不必将您的ResourceDictionary放在“App.xaml”中。如果您有UserControl或Window，则可以链接到ResourceDictionary。

<UserControl.Resources>
 <ResourceDictionary>
  <ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="/MyProjectName;component/BrushResources.xaml" />
  </ResourceDictionary.MergedDictionaries>
 </ResourceDictionary>
</UserContro.Resources>

Answer 3

为什么不在其他程序集中使用MergedDictionaries？

 <ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="pack://application:,,,/BrushesLib;Component/BrushResources.xaml" />
</ResourceDictionary.MergedDictionaries>

Answer 4

如果您知道其他file结构，请使用以下代码： XAML解决方案

assembly

输出：如果我们想将项目ResourceDictionary dictionary = new ResourceDictionary(); dictionary.Source = new Uri("pack://application:,,,/WpfControlLibrary1;Component/RD1.xaml", UriKind.Absolute); foreach (var item in dictionary.Values) { //operations }的{{1}} ResourceDictionary用于RD1.xaml项目。

项目结构：

quite a number of ways

资源字典

代码输出：

c＃解决方案：

使用链接。

从其他Assembly实例化ResourceDictionary xaml

4 个答案: