在MVC 2暧昧的动作方法 [英] Ambiguous action methods in MVC 2

问题描述

我有一些问题在MVC 2暧昧的动作方法我试过落实这里找到解决方案：的 ASP.NET MVC暧昧的动作方法的，但是这只是给了我一个，因为它认为我试图调用该操作方法我的 <资源无法找到错误STRONG>不要 的要调用。我使用的RequiredRequestValueAttribute类是同一个确切的什么在其他问题的解决方案：

I'm having some problems with ambiguous action methods in MVC 2. I've tried implementing the solution found here: ASP.NET MVC ambiguous action methods, but that simply gives me a "The resource cannot be found" error as it thinks I'm trying to invoke the action method I don't want to invoke. The RequiredRequestValueAttribute class I'm using is the exact same one as what was in the other question's solution:

public class RequireRequestValueAttribute : ActionMethodSelectorAttribute
{
    public RequireRequestValueAttribute(string valueName)
    {
        ValueName = valueName;
    }
    public override bool IsValidForRequest(ControllerContext controllerContext, MethodInfo methodInfo)
    {
        return (controllerContext.HttpContext.Request[ValueName] != null);
    }
    public string ValueName { get; private set; }
}

我的行动方法是：

My action methods are:

    //
    // GET: /Reviews/ShowReview/ID

    [RequireRequestValue("id")]
    public ActionResult ShowReview(int id)
    {
        var game = _gameRepository.GetGame(id);

        return View(game);
    }

    //
    // GET: /Reviews/ShowReview/Title

    [RequireRequestValue("title")]
    public ActionResult ShowReview(string title)
    {
        var game = _gameRepository.GetGame(title);

        return View(game);
    }

现在，我试图使用内部编号版本，而不是它的调用串标题版本。

Right now, I'm trying to use the int id version, and instead it's invoking the string title version.

推荐答案

该解决方案假定您必须绝对使用相同的URL不管你被编号或名称选择的，那你的路线设置为传递值从URL此方法。

This solution assumes that you must absolutely use the same URL regardless of if you're selecting by ID or name, and that your route is set up to pass a value to this method from the URL.

[RequireRequestValue("gameIdentifier")]
public ActionResult ShowReview(string gameIdentifier)
{
    int gameId;
    Game game = null;
    var isInteger = Int32.TryParse(gameIdentifier, out gameId);

    if(isInteger)
    {
      game = _gameRepository.GetGame(gameId);
    }
    else
    {
      game = _gameRepository.GetGame(gameIdentifier);
    }

    return View(game);
}

更新：据的微软。操作方法不能根据参数重载当他们与属性，如NonActionAttribute或AcceptVerbsAttribute消除歧义的行动方法可以被重载

Update: According to Microsoft: "Action methods cannot be overloaded based on parameters. Action methods can be overloaded when they are disambiguated with attributes such as NonActionAttribute or AcceptVerbsAttribute."

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