如何从类库项目中加载视图？ [英] How to load views from a Class Library project?

问题描述

我尝试创建一个 VirtualPathProvider 并将视图设置为嵌入式资源。

  class AssemblyResourceVirtualFile：VirtualFile 
 {
 string path; 
 
 public AssemblyResourceVirtualFile（string virtualPath）
：base（virtualPath）
 {
 path = VirtualPathUtility.ToAppRelative（virtualPath）; 
} 
 
 public override System.IO.Stream Open（）
 {
 string [] parts = path.Split（'/'）; 
 string assemblyName = parts [2]; 
 string resourceName = parts [3]; 
 
 assemblyName = Path.Combine（HttpRuntime.BinDirectory，assemblyName）; 
 var assembly = Assembly.LoadFile（assemblyName）; 
 
 if（assembly！= null）
 {
 return assembly.GetManifestResourceStream（resourceName）; 
} 
返回null; 
} 
} 
  

和

  public class AssemblyResourceProvider：System.Web.Hosting.VirtualPathProvider 
 {
 public AssemblyResourceProvider（）{} 
 
 private bool IsAppResourcePath（string virtualPath）
 {
 String checkPath = VirtualPathUtility.ToAppRelative（virtualPath）; 
 return checkPath.StartsWith（〜/ App_Resource /，StringComparison.InvariantCultureIgnoreCase）; 
} 
 
 public override bool FileExists（string virtualPath）
 {
 return（IsAppResourcePath（virtualPath）|| 
 base.FileExists（virtualPath））; 
} 
 
 public override VirtualFile GetFile（string virtualPath）
 {
 if（IsAppResourcePath（virtualPath））
返回新的AssemblyResourceVirtualFile（virtualPath）; 
 else 
 return base.GetFile（virtualPath）; 
} 
 
 public override CacheDependency GetCacheDependency（string virtualPath，
 IEnumerable virtualPathDependencies，DateTime utcStart）
 {
 if（IsAppResourcePath（virtualPath））
返回null; 
 else 
返回base.GetCacheDependency（virtualPath，virtualPathDependencies，utcStart）; 
} 
} 
  

我的控制器

  return View（〜/ App_Resource / Blog.DLL / Blog.Views.Blog.Latest.cshtml）; 
  

它找到该视图，但是我最终得到这个错误：

... view.cshtml必须来自WebViewPage或WebViewPage< TModel>。

当尝试使用以下方式显示部分视图时：

  @ {Html.RenderAction（Latest，博客）; 
  

---

有没有办法解决？ / p>

还是有一个更容易的方式来存储DLL上的视图？

解决方案

发生这种情况的原因是因为您现在正在从未知位置提供剃须刀视图，标准〜/ views / web.config 不再适用。所以你可以在你的自定义视图中放入一个 @inherits System.Web.Mvc.WebViewPage ，但这可能是一个麻烦。

您可以退房以下文章。

I tried to create a VirtualPathProvider and set the view as an embedded resource.

class AssemblyResourceVirtualFile : VirtualFile
{
    string path;

    public AssemblyResourceVirtualFile(string virtualPath)
        : base(virtualPath)
    {
        path = VirtualPathUtility.ToAppRelative(virtualPath);
    }

    public override System.IO.Stream Open()
    {
        string[] parts = path.Split('/');
        string assemblyName = parts[2];
        string resourceName = parts[3];

        assemblyName = Path.Combine(HttpRuntime.BinDirectory, assemblyName);
        var assembly = Assembly.LoadFile(assemblyName);

        if (assembly != null)
        {
            return assembly.GetManifestResourceStream(resourceName);
        }
        return null;
    }
}

And

public class AssemblyResourceProvider : System.Web.Hosting.VirtualPathProvider
{
    public AssemblyResourceProvider() { }

    private bool IsAppResourcePath(string virtualPath)
    {
        String checkPath = VirtualPathUtility.ToAppRelative(virtualPath);
        return checkPath.StartsWith("~/App_Resource/", StringComparison.InvariantCultureIgnoreCase);
    }

    public override bool FileExists(string virtualPath)
    {
        return (IsAppResourcePath(virtualPath) ||
                base.FileExists(virtualPath));
    }

    public override VirtualFile GetFile(string virtualPath)
    {
        if (IsAppResourcePath(virtualPath))
            return new AssemblyResourceVirtualFile(virtualPath);
        else
            return base.GetFile(virtualPath);
    }

    public override CacheDependency GetCacheDependency(string virtualPath,
        IEnumerable virtualPathDependencies, DateTime utcStart)
    {
        if (IsAppResourcePath(virtualPath))
            return null;
        else
            return base.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart);
    }
}

My controller

return View("~/App_Resource/Blog.DLL/Blog.Views.Blog.Latest.cshtml");

It does find the view, but I end up getting this error:

... view.cshtml' must derive from WebViewPage, or WebViewPage<TModel>.

When trying to show the partial view using:

@{ Html.RenderAction("Latest", "Blog"); }

---

Is there a way to fix it?

Or is there an easier way to store views on a DLL?

解决方案

The reason this happens is because you are now serving the razor views from unknown locations the standard ~/views/web.config no longer applies. So you could put a @inherits System.Web.Mvc.WebViewPage inside your custom views but it could be quite a hassle.

You may checkout the following article.

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