如何判断字符串是否与特定的命名路由匹配?
我有这样的路线:
routes.MapRoute(
"FindYourNewRental",
"find-your-new-rental/{market}/{community}.html",
new { controller = "FindYourNewRental", action = "Community" }
);
string url = "http://www.website.com/find-your-new-rental/northerncalifornia/sacramento.html"
如何以编程方式判断'url'字符串是否与该路由匹配?像这样:
// matches url with the named route "FindYourNewRental"
if (IsRouteMatch(url, "FindYourNewRental"))
{
// do something
}
public bool IsRouteMatch(string url, string routeName)
{
// How do I code this function
}
答案 0 :(得分:14)
我通过添加一个自定义RouteInfo类来解决这个问题,该类使用提供的url和应用程序路径创建一个新的HttpContext,并使用它来获取基于新HttpContext对象的RouteData实例。然后,我可以评估Controller和Action值,以查看匹配的路由。我有这个连接到Uri类的扩展方法。感觉有点hackish,我希望有一个更清洁的方法来做到这一点,所以我会保持问题打开,以防其他人有更好的解决方案。
ROUTEINFO CLASS:
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; }
private class InternalHttpContext : HttpContextBase
{
private readonly 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 readonly string _appRelativePath;
private readonly string _pathInfo;
public InternalRequestContext(Uri uri, string applicationPath) : base()
{
_pathInfo = ""; //uri.Query; (this was causing problems, see comments - Stuart)
if (String.IsNullOrEmpty(applicationPath) || !uri.AbsolutePath.StartsWith(applicationPath, StringComparison.OrdinalIgnoreCase))
_appRelativePath = uri.AbsolutePath;
else
_appRelativePath = uri.AbsolutePath.Substring(applicationPath.Length);
}
public override string AppRelativeCurrentExecutionFilePath { get { return String.Concat("~", _appRelativePath); } }
public override string PathInfo { get { return _pathInfo; } }
}
}
URI EXTENSION METHOD:
/// <summary>
/// Extension methods for the Uri class
/// </summary>
public static class UriExtensions
{
/// <summary>
/// Indicates whether the supplied url matches the specified controller and action values based on the MVC routing table defined in global.asax.
/// </summary>
/// <param name="uri">A Uri object containing the url to evaluate</param>
/// <param name="controllerName">The name of the controller class to match</param>
/// <param name="actionName">The name of the action method to match</param>
/// <returns>True if the supplied url is mapped to the supplied controller class and action method, false otherwise.</returns>
public static bool IsRouteMatch(this Uri uri, string controllerName, string actionName)
{
RouteInfo routeInfo = new RouteInfo(uri, HttpContext.Current.Request.ApplicationPath);
return (routeInfo.RouteData.Values["controller"].ToString() == controllerName && routeInfo.RouteData.Values["action"].ToString() == actionName);
}
}
<强> USAGE:强>
Uri url = new Uri("http://www.website.com/find-your-new-rental/northerncalifornia/sacramento.html");
if (url.IsRouteMatch("FindYourNewRental", "Community"))
{
// do something
}
或强>
if (Request.Url.IsRouteMatch("FindYourNewRental", "Community"))
{
// do something
}
ADDED BONUS:因为RouteInfo类给了我一个RouteData实例,我也可以访问路由参数。这导致了另一个Uri扩展方法的创建:
public static string GetRouteParameterValue(this Uri uri, string paramaterName)
{
RouteInfo routeInfo = new RouteInfo(uri, HttpContext.Current.Request.ApplicationPath);
return routeInfo.RouteData.Values[paramaterName] != null ? routeInfo.RouteData.Values[paramaterName].ToString() : null;
}
现在可以这样使用:
string someValue = url.GetRouteParameterValue("ParameterName");