ASP.NET MVC：可用路由数据的Uri [英] ASP.NET MVC: Uri to usable route data

问题描述

我的问题很简单。我有一个Uri，我想弄清楚它所映射的路线，以便可以对路线的各个部分进行一些检查：控制器，动作等。

My problem is pretty simple. I've got a Uri and I want to figure out which route it maps to so I can do some checks on the various pieces of the route: controller, action, etc.

如何从Uri转到RouteData或Route？

How do I go from Uri to RouteData or Route?

推荐答案

基于@tvanfosson的指导，我想到了一个类那就是我需要的。请注意， GetRouteData 实际上会查看 AppRelativeCurrentExecutionFilePath 和 PathInfo RequestContextBase 类中的属性，而不是 Url 属性中的属性。

Based on @tvanfosson's direction, I came up with a class that does what I need. Note that the GetRouteData actually looks at the AppRelativeCurrentExecutionFilePath and the PathInfo properties on the RequestContextBase class, not the Url property.

public class RouteInfo
{
    public RouteInfo(RouteData data)
    {
        RouteData = data;
    }

    public RouteInfo(Uri uri, string applicationPath)
    {
        RouteData = RouteTable.Routes.GetRouteData(new InternalHttpContext(uri, applicationPath));            
    }

    public RouteData RouteData { get; private set; }

    //********************
    //Miscellaneous properties here to deal with routing conditionals... (e.g. "CanRedirectFromSignIn")
    //********************

    private class InternalHttpContext : HttpContextBase
    {
        private HttpRequestBase _request;

        public InternalHttpContext(Uri uri, string applicationPath) : base()
        {
            _request = new InternalRequestContext(uri, applicationPath);
        }

        public override HttpRequestBase Request { get { return _request; } }
    }

    private class InternalRequestContext : HttpRequestBase
    {
        private string _appRelativePath;
        private string _pathInfo;

        public InternalRequestContext(Uri uri, string applicationPath) : base()
        {
            _pathInfo = uri.Query;

            if (String.IsNullOrEmpty(applicationPath) || !uri.AbsolutePath.StartsWith(applicationPath, StringComparison.OrdinalIgnoreCase))
            {
                _appRelativePath = uri.AbsolutePath.Substring(applicationPath.Length);
            }
            else
            {
                _appRelativePath = uri.AbsolutePath;
            }
        }

        public override string AppRelativeCurrentExecutionFilePath { get { return String.Concat("~", _appRelativePath); } }
        public override string PathInfo { get { return _pathInfo; } }
    }
}

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