我可以指定一个自定义位置在ASP.NET MVC中“search视图”吗？
我有我的mvc项目的以下布局：
- /控制器
- /演示
- /演示/ DemoArea1Controller
- /演示/ DemoArea2Controller
- 等等…
- /浏览次数
- /演示
- /Demo/DemoArea1/Index.aspx
- /Demo/DemoArea2/Index.aspx
但是，当我有这样的DemoArea1Controller ：
public class DemoArea1Controller : Controller { public ActionResult Index() { return View(); } }
我得到“查看”索引或其主人无法find“错误，与通常的search位置。
如何在“Demo”视图子文件夹的“Demo”命名空间search中指定该控制器？
您可以轻松地扩展WebFormViewEngine以指定您要查找的所有位置：
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; } }
确保你记得通过修改Global.asax.cs中的Application_Start方法来注册视图引擎
protected void Application_Start() { ViewEngines.Engines.Clear(); ViewEngines.Engines.Add(new CustomViewEngine()); }
实际上比将硬件path硬编码到构造函数中要简单得多。 以下是扩展Razor引擎以添加新path的示例。 我不完全确定的一件事是你在这里添加的path是否会被caching：
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(); } }
和你的Global.asax.cs
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); }
有一件事要注意：您的自定义位置将需要在其根目录中的ViewStart.cshtml文件。
现在，在MVC 6中，您可以实现IViewLocationExpander接口而不会混淆视图引擎：
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 } }
其中{0}是目标视图名称， {1} – 控制器名称和{2} – 区域名称。
您可以返回自己的位置列表，将其与默认的viewLocations （ .Union(viewLocations) ）合并，或者改变它们（ viewLocations.Select(path => "/AnotherPath" + path) ）。
要在MVC中注册自定义视图位置扩展器，请将以下行添加到Startup.cs文件中的ConfigureServices方法：
public void ConfigureServices(IServiceCollection services) { services.Configure<RazorViewEngineOptions>(options => { options.ViewLocationExpanders.Add(new MyViewLocationExpander()); }); }
如果你只想添加新的path，你可以添加到默认的视图引擎和备用一些代码行：
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);
这同样适用于WebFormEngine
您可以改变现有的RazorViewEngine的PartialViewLocationFormats属性，而不是直接replaceRazorViewEngine或直接replaceRazorViewEngine。 这段代码进入Application_Start：
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(); }
最后我检查了一下，这需要你build立你自己的ViewEngine。 但是我不知道他们是否让RC1更容易。
我在第一个RC之前使用的基本方法是，在我自己的ViewEngine中，分割控制器的名称空间，并查找与部分相匹配的文件夹。
编辑：
回去find了代码。 这是一般的想法。
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; }
尝试这样的事情：
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); }
注意：对于ASP.NET MVC 2，他们有额外的位置path，您需要在“区域”中设置视图。
AreaViewLocationFormats AreaPartialViewLocationFormats AreaMasterLocationFormats
Phil的博客描述了为Area创build视图引擎。
注：这是预览版本1，因此可能会有所变化。
