Asp.Net WebApi繼承與基本控制器

Question

我目前正在努力在WebApi中繼承工作，就像我想。 也許你可以指出我正確的方向？

我的目標是擁有一個通用的WebApi項目，它可以在多個其他WebApi項目中重用。

例如：我有一個可重用的UserController，它可以處理多個WebSites的登錄。現在我構建一個新的WebSite並簡單地將UserController添加到新創建的項目中，該項目很簡單。

但是現在對新網站的要求發生了變化，我需要重載UserController方法以反映這些更改而不修改通用控制器。

我想實現可以在下面的代碼片段中看到什麼（當然這不能編譯，因爲C＃抱怨沒有合適的方法超載找到。）

// This belongs to solution "GenericWebApi" 

public class LoginRequest 
{ 
    public string User { get; set; } 
} 

public class BaseApiController : ApiController 
{ 
    [Route("login")] 
    public virtual HttpResponseMessage Login(LoginRequest request) 
    { 
     return new HttpResponseMessage(); 
    } 
} 


// This belongs to solution "CarWebsite" 

public class CarWebsiteLoginRequest : LoginRequest 
{ 
    public string Car { get; set; } 
} 

[RoutePrefix("api/users")] 
public class CarWebsiteApiController : BaseApiController 
{ 
    public override HttpResponseMessage Login(CarWebsiteLoginRequest request) 
    { 
     // Do some car specific login stuff 
     return base.Login(request); 
    } 
} 

一個解決方案，我發現是工作正在用「動態」取代「LoginRequest」和「CarWebsiteLoginRequest」，但感覺簡直是錯誤的，ModelBinder當然不會按預期工作。

任何想法你會如何解決？

在此先感謝

Answer 1

你可以讓你BaseApiController通用：

public class BaseApiController<TLoginRequest> : ApiController 
where TLoginRequest : LoginRequest 
{ 
    [Route("login")] 
    public virtual HttpResponseMessage Login(TLoginRequest request) 
    { 
     return new HttpResponseMessage(); 
    } 
} 

，使您的CarWebsiteApiController使用CarWebsiteLoginRequest作爲一種通用的參數：

public class CarWebsiteApiController : BaseApiController<CarWebsiteLoginRequest> 
{ 
    public override HttpResponseMessage Login(CarWebsiteLoginRequest request) 
    { 
     // Do some car specific login stuff 
     return base.Login(request); 
    } 
} 

Answer 2

如果拔出變量，在方法內部讀取它更容易過載

/// <summary> 
/// Notice name is not Controller.cs This would expose this API if the name ended in controller 
/// </summary> 
public class GenericControllerApi : ApiController 
{ 
    protected JavaScriptSerializer JsonReader = new JavaScriptSerializer(); 

    [HttpPost] 
    public virtual HttpResponseMessage Login() 
    { 
     string JsonRequest = Request.Content.ReadAsStringAsync().Result; 

     LoginRequest JSONData = null; 
     try 
     { 
      JSONData = (LoginRequest)JsonReader.Deserialize(JsonRequest, typeof(LoginRequest)); 
     } 
     catch { } 

     if (JSONData != null) 
     { 
      if (CommonUserCalls(JSONData.User)) 
      { 
       ShowUser UserReturn = new ShowUser(); 
       UserReturn.UserName = "BaseUser"; 
       return Request.CreateResponse(HttpStatusCode.OK, UserReturn); 
      } 

      return Request.CreateErrorResponse(HttpStatusCode.Unauthorized, "Invalid User"); 
     } 
     else 
     { 
      return Request.CreateErrorResponse(HttpStatusCode.BadRequest, "ShowUser not provided"); 
     } 
    } 

    protected bool CommonUserCalls(string User) 
    { 
     if (User == "MyUser") 
     { 
      return true; 
     } 
     return false; 
    } 

    public class LoginRequest 
    { 
     public string User { get; set; } 
    } 

    protected class ShowUser 
    { 
     public string UserName { get; set; } 
    } 
} 

public class CarController : GenericControllerApi 
{ 
    [HttpPost] 
    public override HttpResponseMessage Login() 
    { 
     string JsonRequest = Request.Content.ReadAsStringAsync().Result; 

     CarWebsiteLoginRequest JSONData = null; 
     try 
     { 
      JSONData = (CarWebsiteLoginRequest)JsonReader.Deserialize(JsonRequest, typeof(CarWebsiteLoginRequest)); 
     } 
     catch { } 

     if (JSONData != null) 
     { 
      if (CommonUserCalls(JSONData.User)) 
      { 
       ShowUser UserReturn = new ShowUser(); 
       UserReturn.UserName = "CarUser"; 
       return Request.CreateResponse(HttpStatusCode.OK, UserReturn); 
      } 

      return Request.CreateErrorResponse(HttpStatusCode.Unauthorized, "Invalid User"); 
     } 
     else 
     { 
      return Request.CreateErrorResponse(HttpStatusCode.BadRequest, "CarWebsiteLoginRequest not provided"); 
     } 
    } 

    public class CarWebsiteLoginRequest : LoginRequest 
    { 
     public string Car { get; set; } 
    } 
} 

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