表示一个特性，该特性指定操作方法将响应的 HTTP 谓词。
类签名:
[AttributeUsageAttribute(AttributeTargets.Method, AllowMultiple = false, Inherited = true)] public sealed class AcceptVerbsAttribute : ActionMethodSelectorAttribute
这是个特性类，可以作为特性修饰Action方法，这个特性指定了可以访问Action方法的HttpMethod方法(HttpMethod也被称为HttpVerb)，常见的HttpMehod有GET和POST，如果访问Action的HttpMethod不在特性指定的范围内，将返回HTTP 404错误。
从这个类的源代码中可以看出，该类有两个构造函数，分别是接受HttpVerb枚举和一组变参String，其中HttpVerb枚举是Flag特性的，也就是说可以使用"|"操作符来指定多个参数。
例如让某个Action可同时接受Get和Post的Http访问，可以按下面的代码实现：
[AcceptVerbs(HttpVerbs.Post|HttpVerbs.Get)]
public ActionResult About()
{
return View();
}也可以按下面的代码实现：
[AcceptVerbs("POST","GET")]
public ActionResult About()
{
return View();
}下面是摘自CodePlex的该类的源代码：
/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation. All rights reserved.
*
* This software is subject to the Microsoft Public License (Ms-PL).
* A copy of the license can be found in the license.htm file included
* in this distribution.
*
* You must not remove this notice, or any other, from this software.
*
* ***************************************************************************/
namespace System.Web.Mvc {
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Reflection;
using System.Web.Mvc.Resources;
[SuppressMessage("Microsoft.Design", "CA1019:DefineAccessorsForAttributeArguments",
Justification = "The accessor is exposed as an ICollection.")]
[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(verbs);
}
public ICollectionVerbs {
get;
private set;
}
private static void AddEntryToList(HttpVerbs verbs, HttpVerbs match, ListverbList, string entryText) {
if ((verbs & match) != 0) {
verbList.Add(entryText);
}
}
internal static string[] EnumToArray(HttpVerbs verbs) {
ListverbList = new List();
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.HttpMethod;
return Verbs.Contains(incomingVerb, StringComparer.OrdinalIgnoreCase);
}
}
}版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://blog.csdn.net/songyefei/article/details/8104560