【Web API]沒法添加AttributeRoutes的解決方案

1.按照微軟官方文檔，若是要使用AttributeRoutes，須要在APP_START裏的WebApiConfig.cs的Register方法中添加一行：config.MapHttpAttributeRoutes();

public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
config.MapHttpAttributeRoutes();
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);

// Uncomment the following line of code to enable query support for actions with an IQueryable or IQueryable return type.
// To avoid processing unexpected or malicious queries, use the validation settings on QueryableAttribute to validate incoming queries.
// For more information, visit http://go.microsoft.com/fwlink/?LinkId=279712.
//config.EnableQuerySupport();

// To disable tracing in your application, please comment out or remove the following line of code
// For more information, refer to: http://www.asp.net/web-api
config.EnableSystemDiagnosticsTracing();
}
可是我加了以後死命報錯，劃小紅線，嚶嚶嚶
後來查到解決方法，是由於屬性路由是WebAPI 2中才加的，須要將VS升級到WebAPI 2。在菜單欄Tools-->NuGet package manager--->package manager console,輸入以下命令：

Install-Package Microsoft.AspNet.WebApi.WebHost

運行完畢，重啓VS，小紅線是否是神奇的消失啦，啦啦啦

 

2.升級以後會遇到一些問題，好比後來寫代碼運行的時候，又出問題了，報錯信息以下：

'CommonServices.Areas.HelpPage.XmlDocumentationProvider' does not implement interface member 

解決方法，仍然是調出package manager console，運行以下命令：

install-package Microsoft.AspNet.WebApi.HelpPage