我的mvc项目有以下布局：
但是，当我为DemoArea1Controller提供此内容时
public class DemoArea1Controller : Controller
{
public ActionResult Index()
{
return View();
}
}
我得到了“视图'索引'或其主人找不到”错误，通常的搜索位置。
如何在“Demo”视图子文件夹中指定“Demo”命名空间中的控制器？
答案 0 :(得分：118)
您可以轻松扩展WebFormViewEngine以指定要查看的所有位置：
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;
}
}
确保您记得通过修改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());
}
答案 1 :(得分：41)
现在，在MVC 6中，您可以实现IViewLocationExpander接口，而无需弄乱视图引擎：
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viewLocations（.Union(viewLocations)）合并，或者只需更改它们（viewLocations.Select(path => "/AnotherPath" + path)）。
要在MVC中注册自定义视图位置扩展器，请在ConfigureServices文件中的Startup.cs方法中添加下一行：
public void ConfigureServices(IServiceCollection services)
{
services.Configure<RazorViewEngineOptions>(options =>
{
options.ViewLocationExpanders.Add(new MyViewLocationExpander());
});
}
答案 2 :(得分：40)
实际上，比将路径硬编码到构造函数中要容易得多。下面是扩展Razor引擎以添加新路径的示例。我不太确定的一件事是你在这里添加的路径是否会被缓存：
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();
}
}
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);
}
有一点需要注意：您的自定义位置将需要其根目录中的ViewStart.cshtml文件。
答案 3 :(得分：22)
如果您只想添加新路径，可以添加到默认视图引擎并备用一些代码行：
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);
同样适用于WebFormEngine
答案 4 :(得分：13)
您可以直接更改现有的RazorViewEngine的PartialViewLocationFormats属性，而不是对RazorViewEngine进行子类化或直接替换它。此代码位于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();
}
答案 5 :(得分：3)
最后我检查过，这需要您构建自己的ViewEngine。我不知道他们是否在RC1中更容易。
我在第一个RC之前使用的基本方法是在我自己的ViewEngine中拆分控制器的命名空间并查找与这些部分匹配的文件夹。
修改
回去找到代码。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;
}
答案 6 :(得分：3)
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);
}
答案 7 :(得分：3)
注意：对于ASP.NET MVC 2，他们需要为“区域”中的视图设置其他位置路径。
AreaViewLocationFormats
AreaPartialViewLocationFormats
AreaMasterLocationFormats
为区域创建视图引擎为described on Phil's blog。
注意：这是针对预览版1的，因此可能会发生变化。
答案 8 :(得分：2)
这里的大多数答案都是通过致电ViewEngines.Engines.Clear() 清除现有位置，然后再次将其重新添加……没有必要。
我们可以简单地将新位置添加到现有位置，如下所示：
// 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();
}
}
现在，您可以在Global.asax中将项目配置为使用上面的RazorViewEngine：
protected void Application_Start()
{
ViewEngines.Engines.Add(new ExpandedViewEngine());
// more configurations
}
有关更多信息，请参见this tutoral。
答案 9 :(得分：0)
我在MVC 5中是这样做的。我不想清除默认位置。
助手类：
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();
}
}
}
然后在Application_Start中：
// Add ConKit View locations
ConKit.Helpers.AppStartHelper.AddConKitViewLocations();