为什么MVC URL不可用？

I've created a new MVC web app in VS.NET 2010. I can access localhost/Home/Contact without issue. That's a method that comes built into the example app.

我在VS.NET 2010中创建了一个新的MVC Web应用程序。我可以毫无问题地访问localhost / Home / Contact。这是一个内置于示例应用程序中的方法。

I added another method:

我添加了另一种方法：

[HttpPost]
public ActionResult MyMethod(ClassA content)
{
  return new HttpStatusCodeResult(204);
}

When I try to access this method using:

当我尝试使用以下方法访问此方法时：

localhost/Home/MyMethod

本地主机/主页/的MyMethod

I get a 404 error. I've tried directly in the browser (GET) and also through POSTing. Any idea what might be wrong?

我收到404错误。我已经尝试直接在浏览器（GET）和POSTing。知道什么可能是错的吗？

2 个解决方案

#1

The HttpPost attribute indicates that the action can only be accessed through a POST request, it protects you from other request types (GET, PUT etc.).

HttpPost属性表示该操作只能通过POST请求访问，它可以保护您免受其他请求类型（GET，PUT等）的影响。

POST requests will also work without the attribute, but GET requests will too! This might expose database queries which inserts, updates or removes data through GET requests, which is a bad practice. Imagine Google indexing a page like this: www.mysite.com/Users/Delete/{id}, if you accept GET requests, it might delete your complete user-base.

POST请求也可以在没有属性的情况下工作，但GET请求也是如此！这可能会暴露通过GET请求插入，更新或删除数据的数据库查询，这是一种不好的做法。想象一下谷歌索引这样一个页面：www.mysite.com/Users/Delete/{id}，如果您接受GET请求，它可能会删除您的完整用户群。

GET is to retrieve data, and POST is to submit data. See this question for more info.

GET是检索数据，POST是提交数据。有关详细信息，请参阅此问题。

There are different ways to initiate a POST request.

有不同的方法来发起POST请求。

You can wrap a form inside Html.BeginForm():

您可以在Html.BeginForm（）中包装表单：

@using (Html.BeginForm())
{
    @Html.LabelFor(m => m.UserName);
    @Html.TextBoxFor(m => m.UserName);

    @Html.LabelFor(m => m.Password);
    @Html.PasswordFor(m => m.UserName);

    <input type="submit" value="Login" />
}

Or via jQuery.post():

或者通过jQuery.post（）：

$.post(
    '@Url.Action("MyMethod", "Home")',
    {
        // data for ClassA.
        name: $('#username').val(); // example.
    },
    function (result) {
        // handle the result.
    });

But this GET request won't work if you decorated your action with the HttpPost attribute:

但是，如果使用HttpPost属性修饰操作，则此GET请求将不起作用：

$.get(
    '@Url.Action("MyMethod", "Home")',
    function (result) {
        // this will not work.
    });

Or if you try to access it through your browser. Also see this blogpost.

或者，如果您尝试通过浏览器访问它。另请参阅此博文。

#2

This method only accessed by POST.

此方法仅通过POST访问。

#1