c# - ASP.NET Core ViewLocationExpander 在其他程序集中找不到 View

Question

我有以下解决方案:

src
   /Web
   /Web.Admin
        /Controller
          /TestControllr.cs
        /Views
            /Test
               /Index.cshtml

我将应用程序部分用于单独的我的应用程序部分:

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        var adminAssembly = Assembly.Load(new AssemblyName("Web.Admin"));

        services.AddMvc().AddApplicationPart(adminAssembly);

        services.Configure<RazorViewEngineOptions>(options =>
        {
           options.ViewLocationExpanders.Add(new AdminViewLocationExpander());

        });
    }
}

并创建名称为 AdminViewLocationExpander 的 ViewLocationExpander:

public class AdminViewLocationExpander : IViewLocationExpander
{
    public void PopulateValues(ViewLocationExpanderContext context)
    {
    }

    public IEnumerable<string> ExpandViewLocations(ViewLocationExpanderContext context, IEnumerable<string> viewLocations)
    {
        const string adminAssembly = "Web.Admin";

        var adminViewsLocations = new []
        {
            $"/{adminAssembly}/Views/{{1}}/{{0}}.cshtml",
            $"/{adminAssembly}/Views/Shared/{{0}}.cshtml"
        };

        viewLocations = adminViewsLocations.Concat(viewLocations);

        return viewLocations;
    }
}

当我使用此 URL localhost:6046/Test/Index 运行应用程序时，得到以下内容:

 InvalidOperationException: The view 'Index' was not found. The following 
 locations were searched:
 /Web.Admin/Views/Test/Index.cshtml
 /Web.Admin/Views/Shared/Index.cshtml
 /Views/Test/Index.cshtml
 /Views/Shared/Index.cshtml

我该如何解决这个问题？

Answer 1

在我的项目中，我将 View 作为嵌入资源保存在单独的类库项目/程序集中，打包为 nugets。例如here is one project with embedded views .

我不需要自定义 IViewLocationExpander 来找到它们。相反，我创建了一个这样的扩展方法:

public static RazorViewEngineOptions AddCloudscribeSimpleContentBootstrap3Views(this RazorViewEngineOptions options)
{
    options.FileProviders.Add(new EmbeddedFileProvider(
                typeof(Bootstrap3).GetTypeInfo().Assembly,
                "cloudscribe.SimpleContent.Web.Views.Bootstrap3"
          ));

    return options;
} 

然后在主应用程序启动时，我像这样添加它们:

services.AddMvc()
.AddRazorOptions(options =>
{
    options.AddCloudscribeSimpleContentBootstrap3Views();


});

在我的带有嵌入式 View 的类库中，我只是像往常一样将它们放在 Views 文件夹中，而在我的 .csproj 文件中，我将它们设为嵌入式资源，如下所示:

<ItemGroup>
<EmbeddedResource Include="Views\**" Exclude="bin\**;obj\**;**\*.xproj;packages\**;@(EmbeddedResource)" />
</ItemGroup>

它们的工作方式就好像它们在磁盘上一样，如果我想覆盖/自定义一个 View ，我可以将它复制到本地，然后将自动使用本地 View 而不是嵌入式 View 。