asp.net-mvc - MVC3 : Use of ActionMethodSelectorAttribute causes HttpPostAttribute to be ignored

Question

以下属性用于限制对 ajax 请求的操作的使用:

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

我定义了以下 Controller 操作方法:

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

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

ajax post时出现以下错误:

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

使用附加属性时，HttpPost 属性似乎被忽略。如果我从这两个方法中删除 AjaxRequest 属性，那么代码就可以工作。

正确的实现应该是什么？谢谢!

Answer 1

根据 Pawel 的要求，以下是代码:

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();
    }
}