Asp.net WebAPI 在控制器上未找到任何操作

我收到一个错误-在控制器"action"上找不到与请求匹配的操作.

url是http://localhost:37331/api/action/FindByModule/1.

我使用的路由是

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

控制器:

public class ActionController : ApiController
{
    private IActionRepository repository = null;

    [HttpGet]
    [ActionName("All")]
    public IEnumerable<JsonAction> All()
    {
        return from action in this.repository.Get()
               select new JsonAction
               {
                   ID = action.ID,
                   Text = action.Text.Trim(),
                   Description = action.Description.Trim(),
               };
    }

    [HttpGet]
    [ActionName("FindByModule")]
    public IEnumerable<JsonAction> FindByModule(Int64 moduleId)
    {
        return from action in this.repository.FindByModule(moduleId)
               select new JsonAction
               {
                   ID = action.ID,
                   Text = action.Text.Trim(),
                   Description = action.Description.Trim(),
               };
    }
}