Question

我正在尝试从已编译和导入的MEF模块中访问View，作为项目中自创模块目录中的.dll。

在编写MEF dll之后，我尝试导航到配置的模块URL以检查模块及其控件是否已正确导入，并且一切看起来很好，因为控制器正在尝试获取正确的ActionView，但问题是无法找到.cshtml文件是我在想什么。

我还有一个customViewEngine，它根据指定的文件夹处理模块视图的映射。

customViewEngine的代码

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using Dependency_Injection_MEF_MVC.Components;

public class CustomViewEngine : RazorViewEngine
{
    private List<string> _plugins = new List<string>();

    public CustomViewEngine(List<string> pluginFolders)
    {
        //_plugins = pluginFolders;

        DirectoryInfo d = new DirectoryInfo(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Modules/temp/"));//Assuming Test is your Folder
        FileInfo[] Files = d.GetFiles("*.dll"); //Getting Text files
        foreach (FileInfo file in Files)
        {
            _plugins.Add(file.Name.Substring(0, file.Name.IndexOf('.')));
        }


        ViewLocationFormats = GetViewLocations();
        MasterLocationFormats = GetMasterLocations();
        PartialViewLocationFormats = GetViewLocations();
    }

    public string[] GetViewLocations()
    {
        var views = new List<string>();
        views.Add("~/Views/{0}");

        _plugins.ForEach(plugin =>
            views.Add("~/Modules/temp/" + plugin + "/Views/Home/{0}")
        );

        return views.ToArray();
    }

    public string[] GetMasterLocations()
    {
        var masterPages = new List<string>();

        masterPages.Add("~/Views/Shared/{0}.cshtml");

        _plugins.ForEach(plugin =>
            masterPages.Add("~/Modules/temp/" + plugin + "/Views/Shared/{0}.cshtml")
        );

        return masterPages.ToArray();
    }
}

我收到此错误，分析它我可以看到它检查的最后两个位置应该驻留在哪里但是View引擎无法找到它，即使它在那里。

所以tl：dr

创建了sperate项目，将它们组合成一个主项目中的MEF部分，在编写它们之后，我尝试通过导航到Module的控制器的网页来测试它，在那里我遇到了上述错误。

Answer 1

这与DLL文件锁定有关，基本上我只需要创建模块dll的阴影副本，这样就可以访问所有内容。

这是我使用的一段代码，我在网上找到并完美运行。可能必须更改项目中的路径定义。

private static void genShadowCopy(List<string> pluginFolders){



    DirectoryInfo PluginFolder = new DirectoryInfo(AppDomain.CurrentDomain.BaseDirectory + "/Modules/");


    DirectoryInfo ShadowCopyFolder = new DirectoryInfo(HostingEnvironment.MapPath("~/Modules/temp"));

    String shadowFullPath = ShadowCopyFolder.FullName;

    Directory.CreateDirectory(ShadowCopyFolder.FullName);
    //clear out old plugins in previous shadowcopyfolder)
    foreach (var f in ShadowCopyFolder.GetFiles("*.dll", SearchOption.AllDirectories))
    {
        f.Delete();
    }
    //shadow copy files
    foreach (var plug in PluginFolder.GetFiles("*.dll", SearchOption.AllDirectories))
    {
        var di = Directory.CreateDirectory(ShadowCopyFolder.FullName);
        // NOTE: You cannot rename the plugin DLL to a different name, it will fail because the assembly name is part if it's manifest
        // (a reference to how assemblies are loaded: http://msdn.microsoft.com/en-us/library/yx7xezcf )

        String dif = di.FullName + plug.Name;

        File.Copy(plug.FullName, Path.Combine(di.FullName, plug.Name), true);

    }

ASP MVC无法从导入的MEF模块中找到视图

1 个答案: