MVC3：ActionMethodSelectorAttribute时导致HttpPostAttribute被忽略 [英] MVC3: Use of ActionMethodSelectorAttribute causes HttpPostAttribute to be ignored

问题描述

下面的属性用于限制使用一个动作一个Ajax请求：

The following attribute is used to restrict use of an action to an ajax request:

public class AjaxRequestAttribute : ActionMethodSelectorAttribute
{
    public override bool IsValidForRequest(ControllerContext controllerContext, System.Reflection.MethodInfo methodInfo)
    {
        return controllerContext.HttpContext.Request.IsAjaxRequest();
    }
}

我有以下的控制器操作方法定义的：

I have the following controller action methods defined:

[AjaxRequest]
public ActionResult Login()
{
     ...
}

[HttpPost, AjaxRequest]
public ActionResult Login(LoginModel model, string returnUrl)
{
    ...
}

在阿贾克斯后制成出现以下错误：

The following error occurs when the ajax post is made:

采取行动的当前请求登录控制器类型
  AgentController是下面的操作方法之间暧昧：
  System.Web.Mvc.ActionResult登录（）的类型
  NappWebsiteMvc.Controllers.AgentController System.Web.Mvc.ActionResult
  登录（NappWebsiteMvc.Models.Agent.LoginModel，System.String）的类型
  NappWebsiteMvc.Controllers.AgentController

The current request for action 'Login' on controller type 'AgentController' is ambiguous between the following action methods: System.Web.Mvc.ActionResult Login() on type NappWebsiteMvc.Controllers.AgentController System.Web.Mvc.ActionResult Login(NappWebsiteMvc.Models.Agent.LoginModel, System.String) on type NappWebsiteMvc.Controllers.AgentController

看来，HttpPost属性使用附加属性时被忽略。如果我从两种方法去除AjaxRequest属性，那么code工作。

It seems that the HttpPost attribute is ignored when using the additional attribute. If I remove the AjaxRequest attribute from the two methods, then the code works.

应该是什么的正确实施？谢谢！

What should be the correct implementation? Thanks!

推荐答案

正如帕维尔要求，这里是code：

As requested by Pawel, here is the code:

public class AjaxGetAttribute : ActionMethodSelectorAttribute
{
    public override bool IsValidForRequest(ControllerContext controllerContext, MethodInfo methodInfo)
    {
        var isHttpGet = new AcceptVerbsAttribute(HttpVerbs.Get).IsValidForRequest(controllerContext, methodInfo);
        return isHttpGet && controllerContext.HttpContext.Request.IsAjaxRequest();
    }
}

public class AjaxPostAttribute : ActionMethodSelectorAttribute
{
    public override bool IsValidForRequest(ControllerContext controllerContext, MethodInfo methodInfo)
    {
        var isHttpPost = new AcceptVerbsAttribute(HttpVerbs.Post).IsValidForRequest(controllerContext, methodInfo);
        return isHttpPost && controllerContext.HttpContext.Request.IsAjaxRequest();
    }
}

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