如果你不要求必然要使用REST服务，使用 API / {控制器} / {ID} 路线和尝试的基础上的方法来解决行动获取 / 发表 / 删除 / 把，您可以修改你的路线，经典的MVC路线 API / {控制器} / {行动} / {ID} ，它会解决你的问题。

I am using web API and i am new in this. I am stuck in a routing problem. I have a controller with following actions :

    // GET api/Ceremony
    public IEnumerable<Ceremony> GetCeremonies()
    {
        return db.Ceremonies.AsEnumerable();
    }

    // GET api/Ceremony/5
    public Ceremony GetCeremony(int id)
    {
        Ceremony ceremony = db.Ceremonies.Find(id);
        return ceremony;
    }

    public IEnumerable<Ceremony> GetFilteredCeremonies(Search filter)
    {
        return filter.Ceremonies();
    }

The problem occure when i added the action GetFilteredCeremonies to my controller. After adding this when i make an ajax call to GetCeremonies action then it return an Exception with following message :

"Message":"An error has occurred.","ExceptionMessage":"Multiple actions were 
 found that match the request

FYI: The parameter Search is the Model class which contains properties and a function name Ceremonies.

EDIT

Route:

config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );

If you're not requirement bound to use REST services that use api/{controller}/{id} route and attempt to resolve action based on method GET/POST/DELETE/PUT, you can modify your route to classic MVC route to api/{controller}/{action}/{id} and it will solve your problems.