我可以在ASP.NET MVC中指定一个自定义位置来“搜索视图”吗？

#1 楼

public class CustomViewEngine : WebFormViewEngine
{
    public CustomViewEngine()
    {
        var viewLocations =  new[] {  
            "~/Views/{1}/{0}.aspx",  
            "~/Views/{1}/{0}.ascx",  
            "~/Views/Shared/{0}.aspx",  
            "~/Views/Shared/{0}.ascx",  
            "~/AnotherPath/Views/{0}.ascx"
            // etc
        };

        this.PartialViewLocationFormats = viewLocations;
        this.ViewLocationFormats = viewLocations;
    }
}

protected void Application_Start()
{
    ViewEngines.Engines.Clear();
    ViewEngines.Engines.Add(new CustomViewEngine());
}

#2 楼

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

    public IEnumerable<string> ExpandViewLocations(ViewLocationExpanderContext context, IEnumerable<string> viewLocations)
    {
        return new[]
        {
            "/AnotherPath/Views/{1}/{0}.cshtml",
            "/AnotherPath/Views/Shared/{0}.cshtml"
        }; // add `.Union(viewLocations)` to add default locations
    }
}

public void ConfigureServices(IServiceCollection services)
{
    services.Configure<RazorViewEngineOptions>(options =>
    {
        options.ViewLocationExpanders.Add(new MyViewLocationExpander());
    });
}

#3 楼

public class ExtendedRazorViewEngine : RazorViewEngine
{
    public void AddViewLocationFormat(string paths)
    {
        List<string> existingPaths = new List<string>(ViewLocationFormats);
        existingPaths.Add(paths);

        ViewLocationFormats = existingPaths.ToArray();
    }

    public void AddPartialViewLocationFormat(string paths)
    {
        List<string> existingPaths = new List<string>(PartialViewLocationFormats);
        existingPaths.Add(paths);

        PartialViewLocationFormats = existingPaths.ToArray();
    }
}

protected void Application_Start()
{
    ViewEngines.Engines.Clear();

    ExtendedRazorViewEngine engine = new ExtendedRazorViewEngine();
    engine.AddViewLocationFormat("~/MyThemes/{1}/{0}.cshtml");
    engine.AddViewLocationFormat("~/MyThemes/{1}/{0}.vbhtml");

    // Add a shared location too, as the lines above are controller specific
    engine.AddPartialViewLocationFormat("~/MyThemes/{0}.cshtml");
    engine.AddPartialViewLocationFormat("~/MyThemes/{0}.vbhtml");

    ViewEngines.Engines.Add(engine);

    AreaRegistration.RegisterAllAreas();
    RegisterRoutes(RouteTable.Routes);
}

#4 楼

ViewEngines.Engines.Clear();
var razorEngine = new RazorViewEngine();
razorEngine.MasterLocationFormats = razorEngine.MasterLocationFormats
      .Concat(new[] { 
          "~/custom/path/{0}.cshtml" 
      }).ToArray();

razorEngine.PartialViewLocationFormats = razorEngine.PartialViewLocationFormats
      .Concat(new[] { 
          "~/custom/path/{1}/{0}.cshtml",   // {1} = controller name
          "~/custom/path/Shared/{0}.cshtml" 
      }).ToArray();

ViewEngines.Engines.Add(razorEngine);

#5 楼

System.Web.Mvc.RazorViewEngine rve = (RazorViewEngine)ViewEngines.Engines
  .Where(e=>e.GetType()==typeof(RazorViewEngine))
  .FirstOrDefault();

string[] additionalPartialViewLocations = new[] { 
  "~/Views/[YourCustomPathHere]"
};

if(rve!=null)
{
  rve.PartialViewLocationFormats = rve.PartialViewLocationFormats
    .Union( additionalPartialViewLocations )
    .ToArray();
}

#6 楼

public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName)
{
    string ns = controllerContext.Controller.GetType().Namespace;
    string controller = controllerContext.Controller.GetType().Name.Replace("Controller", "");

    //try to find the view
    string rel = "~/Views/" +
        (
            ns == baseControllerNamespace ? "" :
            ns.Substring(baseControllerNamespace.Length + 1).Replace(".", "/") + "/"
        )
        + controller;
    string[] pathsToSearch = new string[]{
        rel+"/"+viewName+".aspx",
        rel+"/"+viewName+".ascx"
    };

    string viewPath = null;
    foreach (var path in pathsToSearch)
    {
        if (this.VirtualPathProvider.FileExists(path))
        {
            viewPath = path;
            break;
        }
    }

    if (viewPath != null)
    {
        string masterPath = null;

        //try find the master
        if (!string.IsNullOrEmpty(masterName))
        {

            string[] masterPathsToSearch = new string[]{
                rel+"/"+masterName+".master",
                "~/Views/"+ controller +"/"+ masterName+".master",
                "~/Views/Shared/"+ masterName+".master"
            };


            foreach (var path in masterPathsToSearch)
            {
                if (this.VirtualPathProvider.FileExists(path))
                {
                    masterPath = path;
                    break;
                }
            }
        }

        if (string.IsNullOrEmpty(masterName) || masterPath != null)
        {
            return new ViewEngineResult(
                this.CreateView(controllerContext, viewPath, masterPath), this);
        }
    }

    //try default implementation
    var result = base.FindView(controllerContext, viewName, masterName);
    if (result.View == null)
    {
        //add the location searched
        return new ViewEngineResult(pathsToSearch);
    }
    return result;
}

#7 楼

private static void RegisterViewEngines(ICollection<IViewEngine> engines)
{
    engines.Add(new WebFormViewEngine
    {
        MasterLocationFormats = new[] {"~/App/Views/Admin/{0}.master"},
        PartialViewLocationFormats = new[] {"~/App/Views/Admin//{1}/{0}.ascx"},
        ViewLocationFormats = new[] {"~/App/Views/Admin//{1}/{0}.aspx"}
    });
}

protected void Application_Start()
{
    RegisterViewEngines(ViewEngines.Engines);
}

#8 楼

 AreaViewLocationFormats
 AreaPartialViewLocationFormats
 AreaMasterLocationFormats

#9 楼

// note that the base class is RazorViewEngine, NOT WebFormViewEngine
public class ExpandedViewEngine : RazorViewEngine
{
    public ExpandedViewEngine()
    {
        var customViewSubfolders = new[] 
        {
            // {1} is conroller name, {0} is action name
            "~/Areas/AreaName/Views/Subfolder1/{1}/{0}.cshtml",
            "~/Areas/AreaName/Views/Subfolder1/Shared/{0}.cshtml"
        };

        var customPartialViewSubfolders = new[] 
        {
            "~/Areas/MyAreaName/Views/Subfolder1/{1}/Partials/{0}.cshtml",
            "~/Areas/MyAreaName/Views/Subfolder1/Shared/Partials/{0}.cshtml"
        };

        ViewLocationFormats = ViewLocationFormats.Union(customViewSubfolders).ToArray();
        PartialViewLocationFormats = PartialViewLocationFormats.Union(customPartialViewSubfolders).ToArray();

        // use the following if you want to extend the master locations
        // MasterLocationFormats = MasterLocationFormats.Union(new[] { "new master location" }).ToArray();   
    }
}

protected void Application_Start()
{
    ViewEngines.Engines.Add(new ExpandedViewEngine());
    // more configurations
}

#10 楼

namespace ConKit.Helpers
{
    public static class AppStartHelper
    {
        public static void AddConKitViewLocations()
        {
            // get engine
            RazorViewEngine engine = ViewEngines.Engines.OfType<RazorViewEngine>().FirstOrDefault();
            if (engine == null)
            {
                return;
            }

            // extend view locations
            engine.ViewLocationFormats =
                engine.ViewLocationFormats.Concat(new string[] {
                    "~/Views/ConKit/{1}/{0}.cshtml",
                    "~/Views/ConKit/{0}.cshtml"
                }).ToArray();

            // extend partial view locations
            engine.PartialViewLocationFormats =
                engine.PartialViewLocationFormats.Concat(new string[] {
                    "~/Views/ConKit/{0}.cshtml"
                }).ToArray();
        }
    }
}

// Add ConKit View locations
ConKit.Helpers.AppStartHelper.AddConKitViewLocations();