Web Api <T>方法

Question

我的問題很有意思。我的代碼;

public JsonResult<ResultStatus> Post<T>(string query, [FromBody]T value) where T: GelYikaBase 
    { 

     return Json(new ResultStatus()); 
    } 

我想用我做的，唯一的方法來保存該數據庫的任何對象。但我不知道如何以這種方式插入URL的功能。

錯誤;

{"Message": "An error has occurred." 
"ExceptionMessage": "Cannot call action method 'System.Web.Http.Results.JsonResult`1[GelYikaFreamwork.Data.ResultStatus] Post[T](System.String, T)' on controller 'Gel_Yıka_Servis.Controllers.ServisController' because the action method is a generic method." 
"ExceptionType": "System.InvalidOperationException" 
"StackTrace": " konum: System.Web.Http.Controllers.ReflectedHttpActionDescriptor.InitializeActionExecutor(MethodInfo methodInfo) konum: System.Web.Http.Controllers.ReflectedHttpActionDescriptor.<InitializeProperties>b__4() konum: System.Lazy`1.CreateValue() konum: System.Lazy`1.LazyInitValue() konum: System.Lazy`1.get_Value() konum: System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken) --- Özel durumun oluşturulduğu önceki konumdan başlayan yığın izlemesinin sonu --- konum: System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) konum: System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) konum: System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() konum: System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext() --- Özel durumun oluşturulduğu önceki konumdan başlayan yığın izlemesinin sonu --- konum: System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) konum: System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) konum: System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() konum: System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext() --- Özel durumun oluşturulduğu önceki konumdan başlayan yığın izlemesinin sonu --- konum: System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) konum: System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) konum: System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() konum: System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()" 
} 

Answer 1

這種方法的問題是Web API不知道如何反序列化對象：

的一般常見的用法可能是這樣的：

// My generic method 
void GenericMethod<T>(){} 
... 
// Call the generic method by specifying the type of T: 
GenericMethod<string>() 

你的情況，您可以從Http請求中調用Post方法，以便在調用請求時不提供T的類型。

而不是有一個通用的方法，你可以有一個通用的控制器。 比方說，你有這些模型定義：

public abstract class GelYikaBase { } 

public class GelYika1 : GelYikaBase{} 

public class GelYika2 : GelYikaBase { } 

你可以寫一個通用的控制器來處理，從GelYikaBase繼承類：

public class GelYikaBaseController<T> : ApiController where T : GelYikaBase 
{ 
    public JsonResult<ResultStatus> Post(string query, T value) 
    { 
     return Json(new ResultStatus()); 
    } 
} 

public class GelYika1Controller<T> : GelYikaBaseController<GelYika1> { } 

public class GelYika2Controller<T> : GelYikaBaseController<GelYika2> { } 

這樣做，網頁API知道如何反序列化GelYikaBase目的。