控制器操作具有不同签名的方法 [英] Controller Action Methods with different signatures

问题描述

我想以 files / id 格式取得我的网址。我猜我应该有两个Index方法在我的控制器，一个有一个参数，一个没有。

I am trying to get my URLs in files/id format. I am guessing I should have two Index methods in my controller, one with a parameter and one with not. But I get this error message in browser below.

这里是我的控制器方法：

Anyway here is my controller methods:

public ActionResult Index()
{
    return Content("Index ");
}

public ActionResult Index(int id)
{
    File file = fileRepository.GetFile(id);
    if (file == null) return Content("Not Found");
    else return Content(file.FileID.ToString());
}

更新：完成添加路线。感谢Jeff

Update: Done with adding a route. Thanks to Jeff

推荐答案

您只能。在你的情况下，你会想要一个动作与一个可空的ID参数，如：

You can only overload Actions if they differ in arguments and in Verb, not just arguments. In your case you'll want to have one action with a nullable ID parameter like so:

public ActionResult Index(int? id){ 
    if( id.HasValue ){
        File file = fileRepository.GetFile(id.Value);
        if (file == null) return Content("Not Found");
            return Content(file.FileID.ToString());

    } else {
        return Content("Index ");
    }
}

您还应该阅读Phil Haack的方法如何成为行动。

You should also read Phil Haack's How a Method Becomes an Action.

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