ASP.NET MVC 5路由可选参数

Web API需要显式设置可选值,即使对于可空类型和类也是如此.

使用默认值为可选参数:

[Route("Rest/GetName/{name?}")]
public IHttpActionResult GetName(string name = null) {
    // cut - code here is trivial but long, I just fill in an object to return as Json code
    return Json(myObject);
}

不要忘记路由注册:

httpConfig.MapHttpAttributeRoutes()