Asp.Net MVC：如何获取当前控制器/视图的虚拟URL？

Is it possible to get the route/virtual url associated with a controller action or on a view? I saw that Preview 4 added LinkBuilder.BuildUrlFromExpression helper, but it's not very useful if you want to use it on the master, since the controller type can be different. Any thoughts are appreciated.

是否可以获取与控制器操作或视图关联的路由/虚拟URL？我看到预览4添加了LinkBuilder.BuildUrlFromExpression助手，但如果你想在master上使用它，它不是很有用，因为控制器类型可能不同。任何想法都表示赞赏。

5 个解决方案

#1

I always try to implement the simplest solution that meets the project requirements. As Enstein said, "Make things as simple as possible, but not simpler." Try this.

我总是尝试实施满足项目要求的最简单的解决方案。正如恩斯坦所说，“让事情变得尽可能简单，但并不简单。”尝试这个。

<%: Request.Path %>

#2

This worked for me:

这对我有用：

<%= this.Url.RouteUrl(this.ViewContext.RouteData.Values) %>

<％= this.Url.RouteUrl（this.ViewContext.RouteData.Values）％>

It returns the current Url as such; /Home/About

它会返回当前的Url; /首页/关于

Maybe there is a simpler way to return the actual route string?

也许有一种更简单的方法来返回实际的路由字符串？

#3

You can get that data from ViewContext.RouteData. Below are some examples for how to access (and use) that information:

您可以从ViewContext.RouteData获取该数据。以下是如何访问（和使用）该信息的一些示例：

/// These are added to my viewmasterpage, viewpage, and viewusercontrol base classes:

///这些被添加到我的viewmasterpage，viewpage和viewusercontrol基类：

public bool IsController(string controller)
{
    if (ViewContext.RouteData.Values["controller"] != null)
    {
        return ViewContext.RouteData.Values["controller"].ToString().Equals(controller, StringComparison.OrdinalIgnoreCase);
    }
    return false;
}
public bool IsAction(string action)
{
    if (ViewContext.RouteData.Values["action"] != null)
    {
        return ViewContext.RouteData.Values["action"].ToString().Equals(action, StringComparison.OrdinalIgnoreCase);
    }
    return false;
}
public bool IsAction(string action, string controller)
{
    return IsController(controller) && IsAction(action);
}

/// Some extension methods that I added to the UrlHelper class.

///我添加到UrlHelper类的一些扩展方法。

public static class UrlHelperExtensions
{
    /// <summary>
    /// Determines if the current view equals the specified action
    /// </summary>
    /// <typeparam name="TController">The type of the controller.</typeparam>
    /// <param name="helper">Url Helper</param>
    /// <param name="action">The action to check.</param>
    /// <returns>
    ///     <c>true</c> if the specified action is the current view; otherwise, <c>false</c>.
    /// </returns>
    public static bool IsAction<TController>(this UrlHelper helper, LambdaExpression action) where TController : Controller
    {
        MethodCallExpression call = action.Body as MethodCallExpression;
        if (call == null)
        {
            throw new ArgumentException("Expression must be a method call", "action");
        }

        return (call.Method.Name.Equals(helper.ViewContext.ViewName, StringComparison.OrdinalIgnoreCase) &&
                typeof(TController) == helper.ViewContext.Controller.GetType());
    }

    /// <summary>
    /// Determines if the current view equals the specified action
    /// </summary>
    /// <param name="helper">Url Helper</param>
    /// <param name="actionName">Name of the action.</param>
    /// <returns>
    ///     <c>true</c> if the specified action is the current view; otherwise, <c>false</c>.
    /// </returns>
    public static bool IsAction(this UrlHelper helper, string actionName)
    {
        if (String.IsNullOrEmpty(actionName))
        {
            throw new ArgumentException("Please specify the name of the action", "actionName");
        }
        string controllerName = helper.ViewContext.RouteData.GetRequiredString("controller");
        return IsAction(helper, actionName, controllerName);
    }

    /// <summary>
    /// Determines if the current view equals the specified action
    /// </summary>
    /// <param name="helper">Url Helper</param>
    /// <param name="actionName">Name of the action.</param>
    /// <param name="controllerName">Name of the controller.</param>
    /// <returns>
    ///     <c>true</c> if the specified action is the current view; otherwise, <c>false</c>.
    /// </returns>
    public static bool IsAction(this UrlHelper helper, string actionName, string controllerName)
    {
        if (String.IsNullOrEmpty(actionName))
        {
            throw new ArgumentException("Please specify the name of the action", "actionName");
        }
        if (String.IsNullOrEmpty(controllerName))
        {
            throw new ArgumentException("Please specify the name of the controller", "controllerName");
        }

        if (!controllerName.EndsWith("Controller", StringComparison.OrdinalIgnoreCase))
        {
            controllerName = controllerName + "Controller";
        }

        bool isOnView = helper.ViewContext.ViewName.SafeEquals(actionName, StringComparison.OrdinalIgnoreCase);
        return isOnView && helper.ViewContext.Controller.GetType().Name.Equals(controllerName, StringComparison.OrdinalIgnoreCase);
    }

    /// <summary>
    /// Determines if the current request is on the specified controller
    /// </summary>
    /// <param name="helper">The helper.</param>
    /// <param name="controllerName">Name of the controller.</param>
    /// <returns>
    ///     <c>true</c> if the current view is on the specified controller; otherwise, <c>false</c>.
    /// </returns>
    public static bool IsController(this UrlHelper helper, string controllerName)
    {
        if (String.IsNullOrEmpty(controllerName))
        {
            throw new ArgumentException("Please specify the name of the controller", "controllerName");
        }

        if (!controllerName.EndsWith("Controller", StringComparison.OrdinalIgnoreCase))
        {
            controllerName = controllerName + "Controller";
        }

        return helper.ViewContext.Controller.GetType().Name.Equals(controllerName, StringComparison.OrdinalIgnoreCase);
    }

    /// <summary>
    /// Determines if the current request is on the specified controller
    /// </summary>
    /// <typeparam name="TController">The type of the controller.</typeparam>
    /// <param name="helper">The helper.</param>
    /// <returns>
    ///     <c>true</c> if the current view is on the specified controller; otherwise, <c>false</c>.
    /// </returns>
    public static bool IsController<TController>(this UrlHelper helper) where TController : Controller
    {
        return (typeof(TController) == helper.ViewContext.Controller.GetType());
    }
}

#4

You can use <%= Url.Action(action, controller, values) %> to build the URL from within the master page.

您可以使用<％= Url.Action（action，controller，values）％>从母版页中构建URL。

Are you doing this to maybe highlight a tab for the current page or something?

你这样做是为了突出显示当前页面的标签或什么？

If so you can use ViewContext from the view and get the values you need.

如果是这样，您可以从视图中使用ViewContext并获取所需的值。

#5

I wrote a helper class that allows me to access the route parameters. With this helper, you can get the controller, action, and all parameters passed to the action.

我写了一个帮助类，允许我访问路由参数。使用此帮助程序，您可以获取控制器，操作以及传递给操作的所有参数。