MVC扩展（ActionNameSelectorAttribute vs ActionMethodSelectorAttribute）

关于ActionNameSelectorAttribute 和 ActionMethodSelectorAttribute的区别，请参考http://www.cnblogs.com/P_Chou/archive/2010/12/01/details-asp-net-mvc-07.html

 

区分 [HttpPost] 和  [AcceptVerbs(HttpVerbs.Post)] .他们都是ActionMethodSelectorAttribute的子类。查看代码

 

[SuppressMessage("Microsoft.Design", "CA1019:DefineAccessorsForAttributeArguments", Justification = "The accessor is exposed as an ICollection<string>.")]

    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]

    public sealed class AcceptVerbsAttribute : ActionMethodSelectorAttribute {

        public AcceptVerbsAttribute(HttpVerbs verbs)

            : this(EnumToArray(verbs)) {

        }



        public AcceptVerbsAttribute(params string[] verbs) {

            if (verbs == null || verbs.Length == 0) {

                throw new ArgumentException(MvcResources.Common_NullOrEmpty, "verbs");

            }



            Verbs = new ReadOnlyCollection<string>(verbs);

        }



        public ICollection<string> Verbs {

            get;

            private set;

        }



        private static void AddEntryToList(HttpVerbs verbs, HttpVerbs match, List<string> verbList, string entryText) {

            if ((verbs & match) != 0) {

                verbList.Add(entryText);

            }

        }



        internal static string[] EnumToArray(HttpVerbs verbs) {

            List<string> verbList = new List<string>();



            AddEntryToList(verbs, HttpVerbs.Get, verbList, "GET");

            AddEntryToList(verbs, HttpVerbs.Post, verbList, "POST");

            AddEntryToList(verbs, HttpVerbs.Put, verbList, "PUT");

            AddEntryToList(verbs, HttpVerbs.Delete, verbList, "DELETE");

            AddEntryToList(verbs, HttpVerbs.Head, verbList, "HEAD");



            return verbList.ToArray();

        }



        public override bool IsValidForRequest(ControllerContext controllerContext, MethodInfo methodInfo) {

            if (controllerContext == null) {

                throw new ArgumentNullException("controllerContext");

            }



            string incomingVerb = controllerContext.HttpContext.Request.GetHttpMethodOverride();



            return Verbs.Contains(incomingVerb, StringComparer.OrdinalIgnoreCase);

        }

    }

[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)]

    public sealed class HttpPostAttribute : ActionMethodSelectorAttribute {



        private static readonly AcceptVerbsAttribute _innerAttribute = new AcceptVerbsAttribute(HttpVerbs.Post);



        public override bool IsValidForRequest(ControllerContext controllerContext, MethodInfo methodInfo) {

            return _innerAttribute.IsValidForRequest(controllerContext, methodInfo);

        }

    }

可以看作

[AcceptVerbs(HttpVerbs.Post)]

public ActionResult MyTest() 

完全等于

[HttpPost]

public ActionResult MyTest()

 

但当Action同时接受2种提交方式时。就应该使用

[AcceptVerbs(HttpVerbs.Post | HttpVerbs.Put)]

public ActionResult MyTest()

而不能用

[HttpPost]
[HttpGet]

public ActionResult MyTest()

因为一个请求不可能既是Post又是Get.

 

关于ActionNameSelectorAttribute , ActionMethodSelectorAttribute使用和扩展

这里给了详细的说明，  请参照