URL格式动作，而ViewContext [英] Url Form Action Without ViewContext

问题描述

是否有可能得到一个动作的URL不知道ViewContext（例如，在一个控制器）？事情是这样的：

Is it possible to get a URL from an action without knowing ViewContext (e.g., in a controller)? Something like this:

LinkBuilder.BuildUrlFromExpression(ViewContext context, Expression<Action<T>> action)

...但使用Controller.RouteData代替ViewContext。我似乎对这个金属块。

...but using Controller.RouteData instead of ViewContext. I seem to have metal block on this.

推荐答案

下面是我如何做到这一点的单元测试：

Here's how I do it in a unit test:

    private string RouteValueDictionaryToUrl(RouteValueDictionary rvd)
    {
        var context = MvcMockHelpers.FakeHttpContext("~/");
        // _routes is a RouteCollection
        var vpd = _routes.GetVirtualPath(
            new RequestContext(context, _
                routes.GetRouteData(context)), rvd);
        return vpd.VirtualPath;
    }

每评论，我会适应的控制器：

Per comments, I'll adapt to a controller:

string path = RouteTable.Routes.GetVirtualPath(
    new RequestContext(HttpContext, 
        RouteTable.Routes.GetRouteData(HttpContext)),
    new RouteValueDictionary( 
        new { controller = "Foo",
              action = "Bar" })).VirtualPath;

用真实姓名替换富和栏。这是把我的头顶部，所以我不能保证这是最有效的解决方案成为可能，但它应该让你在正确的轨道上。

Replace "Foo" and "Bar" with real names. This is off the top of my head, so I can't guarantee that it's the most efficient solution possible, but it should get you on the right track.

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