关于asp.net mvc：MVC [HttpPost / HttpGet]操作

MVC [HttpPost/HttpGet] for Action

我正在使用MVC C#。

有人可以举例说明为什么要使用

1	[HttpPost/HttpGet]

操作。主动者如何兼具两者-实际用途是什么？

假设您有一个Login操作，该操作为用户提供了登录屏幕，然后在用户提交表单后收到了用户名和密码：

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public ActionResult Login() {
return View();
}

public ActionResult Login(string userName, string password) {
// do login stuff
return View();
}

即使我们可以通过查看来了解，

MVC仍未获得关于哪个动作的明确说明。如果将[HttpGet]添加到第一个操作并将[HttpPost]添加到节操作，则MVC清楚地知道哪个操作是哪个。

为什么？请参阅请求方法。长短：当用户查看页面时，这是一个GET请求，而当用户提交表单时，通常是一个POST请求。 HttpGet和HttpPost仅将操作限制为适用的请求类型。

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[HttpGet]
public ActionResult Login() {
return View();
}

[HttpPost]
public ActionResult Login(string userName, string password) {
// do login stuff
return View();
}

如果您的操作服务于多个动词的请求，您还可以组合请求方法属性：

[AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post)]。

相关讨论

您无需同时指定两个动词，除非您专门限制其他动词(即您不希望输入或删除等)。

与某些注释相反，我也无法同时使用两个属性[HttpGet, HttpPost]，但能够同时指定两个动词。

动作

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private ActionResult testResult(int id)
{
return Json(new {
// user input
input = id,
// just so there's different content in the response
when = DateTime.Now,
// type of request
req = this.Request.HttpMethod,
// differentiate calls in response, for matching up
call = new StackTrace().GetFrame(1).GetMethod().Name
},
JsonRequestBehavior.AllowGet);
}
public ActionResult Test(int id)
{
return testResult(id);
}
[HttpGet]
public ActionResult TestGetOnly(int id)
{
return testResult(id);
}
[HttpPost]
public ActionResult TestPostOnly(int id)
{
return testResult(id);
}
[HttpPost, HttpGet]
public ActionResult TestBoth(int id)
{
return testResult(id);
}
[AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post)]
public ActionResult TestVerbs(int id)
{
return testResult(id);
}

结果

通过POSTMAN，按markdowntables格式化

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| Method | URL | Response |
|-------- |---------------------- |---------------------------------------------------------------------------------------- |
| GET | /ctrl/test/5 | {"input": 5,"when":"/Date(1408041216116)/","req":"GET","call":"Test" } |
| POST | /ctrl/test/5 | {"input": 5,"when":"/Date(1408041227561)/","req":"POST","call":"Test" } |
| PUT | /ctrl/test/5 | {"input": 5,"when":"/Date(1408041252646)/","req":"PUT","call":"Test" } |
| GET | /ctrl/testgetonly/5 | {"input": 5,"when":"/Date(1408041335907)/","req":"GET","call":"TestGetOnly" } |
| POST | /ctrl/testgetonly/5 | 404 |
| PUT | /ctrl/testgetonly/5 | 404 |
| GET | /ctrl/TestPostOnly/5 | 404 |
| POST | /ctrl/TestPostOnly/5 | {"input": 5,"when":"/Date(1408041464096)/","req":"POST","call":"TestPostOnly" } |
| PUT | /ctrl/TestPostOnly/5 | 404 |
| GET | /ctrl/TestBoth/5 | 404 |
| POST | /ctrl/TestBoth/5 | 404 |
| PUT | /ctrl/TestBoth/5 | 404 |
| GET | /ctrl/TestVerbs/5 | {"input": 5,"when":"/Date(1408041709606)/","req":"GET","call":"TestVerbs" } |
| POST | /ctrl/TestVerbs/5 | {"input": 5,"when":"/Date(1408041831549)/","req":"POST","call":"TestVerbs" } |
| PUT | /ctrl/TestVerbs/5 | 404 |