- html - 出于某种原因,IE8 对我的 Sass 文件中继承的 html5 CSS 不友好?
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景?
在 Controller 上调用特定方法时,我收到以下不一致的错误:
An error occurred when trying to create a controller of type 'TimelineController'. Make sure that the controller has a parameterless public constructor.
令人困惑的部分是这个方法偶尔会起作用,并且 Controller 本身确实有一个无参数构造函数。这是代码的简短示例:
[Authorize]
[RoutePrefix("api/timeline")]
public class TimelineController : CherishApiController
{
private readonly TimelineEventRepository _timelineEventRepository;
private readonly BlobHelper _blobHelper;
private readonly ChildHelper _childHelper;
private readonly AccountHelper _accountHelper;
public TimelineController()
{
_timelineEventRepository = new TimelineEventRepository();
_blobHelper = new BlobHelper();
_childHelper = new ChildHelper();
_accountHelper = new AccountHelper();
}
[HttpPost]
[Route("UploadImage")]
[ResponseType(typeof(UploadMediaResponse))]
public async Task<HttpResponseMessage> UploadImage()
{
try
{
return await Upload(Request.Content, MediaType.Image);
}
catch (Exception ex)
{
return ErrorResponse(ex);
}
}
private async Task<HttpResponseMessage> Upload(HttpContent requestContent, string mediaType)
{
// reads the data from the multi-part request and stores a record in an Azure DocumentDB
}
}
正如你所看到的,我没有使用任何形式的依赖注入(inject)(因为这是一个小型的非必要的 Web 应用程序),而且我在研究时看到的几乎所有解决方案都涉及 DI 设置问题。
这里是完整的堆栈跟踪(如果有帮助的话):
An error occurred when trying to create a controller of type 'TimelineController'. Make sure that the controller has a parameterless public constructor.","ExceptionType":"System.InvalidOperationException","StackTrace":"
at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)\r\n
at System.Web.Http.Controllers.HttpControllerDescriptor.CreateController(HttpRequestMessage request)\r\n
at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()","InnerException":{"Message":"An error has occurred.","ExceptionMessage":"One or more errors occurred.","ExceptionType":"System.AggregateException","StackTrace":"
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)\r\n
at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)\r\n
at System.Threading.Tasks.Task`1.get_Result()\r\n
at Microsoft.Azure.Documents.Linq.DocumentQuery`1.GetEnumerator()\r\n
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)\r\n
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)\r\n
at Cherish.Domain.Repositories.Implementation.DocumentRepository`1.ReadOrCreateDatabase()\r\n
at Cherish.Domain.Repositories.Implementation.DocumentRepository`1..ctor()\r\n
at lambda_method(Closure )\r\n
at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)","InnerException":{"Message":"An error has occurred.","ExceptionMessage":"An error occurred while sending the request.","ExceptionType":"System.Net.Http.HttpRequestException","StackTrace":"
at Microsoft.Azure.Documents.BackoffRetryUtility`1.<ExecuteAsync>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at Microsoft.Azure.Documents.Linq.DocumentQueryExecutionContext.<ExecuteAllAsync>d__7.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at Microsoft.Azure.Documents.Linq.DocumentQuery`1.<GetEnumeratorTAsync>d__10.MoveNext()","InnerException":{"Message":"An error has occurred.","ExceptionMessage":"Unable to connect to the remote server","ExceptionType":"System.Net.WebException","StackTrace":"
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)\r\n
at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)","InnerException":{"Message":"An error has occurred.","ExceptionMessage":"An attempt was made to access a socket in a way forbidden by its access permissions","ExceptionType":"System.Net.Sockets.SocketException","StackTrace":"
at System.Net.Sockets.Socket.DoBind(EndPoint endPointSnapshot, SocketAddress socketAddress)\r\n
at System.Net.Sockets.Socket.InternalBind(EndPoint localEP)\r\n
at System.Net.Sockets.Socket.BeginConnectEx(EndPoint remoteEP, Boolean flowContext, AsyncCallback callback, Object state)\r\n
at System.Net.Sockets.Socket.UnsafeBeginConnect(EndPoint remoteEP, AsyncCallback callback, Object state)\r\n
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)"}}}}}
任何人都可以指导我解决问题吗?
最佳答案
Can anyone guide me on what the issue is?
当然
An error occurred when trying to create a controller of type 'TimelineController'.
这是实际的错误。 ControllerFactory 无法创建 Controller 。
Make sure that the controller has a parameterless public constructor.
这只是一条有用的消息,因为大多数情况下,对于非依赖注入(inject) Controller 来说,这就是问题所在。
构造函数创建了 4 个对象(看起来是使用依赖注入(inject)的好例子)。
_timelineEventRepository = new TimelineEventRepository();
_blobHelper = new BlobHelper();
_childHelper = new ChildHelper();
_accountHelper = new AccountHelper();
您只需将它们全部注释掉,它应该“可以”创建 Controller 。显然,方法调用会中断,但这将证明其中之一就是问题所在。如果我猜的话,我会说 TimelineEventRepository()
是罪魁祸首。哪个人导致了问题,您应该能够在 Visual Studio 中对其进行调试。
关于c# - 尝试创建 Controller 时发生错误,请确保 Controller 具有无参数公共(public)构造函数,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30328767/
下面的代码旨在在首次打开工作簿时运行。 Sub Auto_Open() Dim LastRow As Integer LastRow = Sheet6.UsedRange.Rows.Count Act
当我尝试操作我的代码时,除了弹出调试错误外,它执行得很好。错误信息在这里。 我的完整代码在这里。 #include using namespace std; class String { publi
The invocation of the constructor on type 'WpfApplication1.MainWindow' that matches the specified bi
我正在使用 BaseAdapter: public class MyAdapter extends BaseAdapter{ private final LayoutInflater mInflate
我想做网页抓取。我写了代码 var connection = require('./mysqlConnection'); var c = new Crawler({ maxConnections
我的系统中发生 Java 堆空间错误。我尝试了很多来自 Stack Overflow 的解决方案,但没有任何效果。当我工作时 当按下 OK 然后 (我的项目没有错误) 我的 eclipse.ini 是
环境: i5 750 DDR3 4GWin7 专业版 x64 sp1 DXSDK 9.0c 2010 年 6 月 GeForce GT240(驱动程序 275.33)512MB MSVC 2008 s
这段代码是我写的。 import socket host = 'localhost' port = 3794 s = socket.socket(socket.AF_INET, socket.SOCK
我正在尝试引用 UTC 时间间隔获取本地日期时间,我正在执行下面的代码。 var dtString =DateTime.UtcNow.ToString(@"yyyy-MM-ddTHH\:mm\:ss
我有一个非常简单的 C# 问题,它从库中加载 Windows WPF 窗口。这是代码: public partial class App : Application { public App(
我目前正在使用带有导航组件的底部导航,它工作正常但是当我们点击导航项 fragment 正在加载然后闪烁正在发生,即使当前选择的项目也会发生闪烁。它在加载 fragment 时发生。我的应用程序屏幕背
我是新来的 kotlin , 当我开始 Null Safety 时,我对下面的情况感到困惑. There's some data inconsistency with regard to initia
我有一个框,其中包含同时发生的两个独立的 css 转换。 当转换发生时,图标下方的标题和段落文本移动位置 参见 JS Fiddle:http://jsfiddle.net/Lsnbpt8r/ 这是我的
在为黑莓 10 构建电话间隙应用程序时,我遇到了异常情况。 [BUILD] Populating application source [BUILD] Parsing config.xml [
这个问题在这里已经有了答案: How to properly stop the Thread in Java? (8 个回答) 3年前关闭。 我看过How to properly stop the T
我试图弄清楚发生 fatal error 时如何刷新页面。基本上我正在访问图像 api 并将图像复制到我的服务器。我还每次都创建照片的缩略图版本。我会每隔一段时间收到一条错误消息,指出我的脚本试图分配
我正在尝试使用断言函数检查元素是否在屏幕上。我在我的测试应用程序 (AndroidDriver) 中使用 Appium 和 Java。我期望的是,如果元素在屏幕上,则返回 1;如果不在屏幕上,则返回
我正在开发图像上传系统。我使用 CommonsMultipartResolver 设置 maxUploadSize。当我尝试上传超过最大尺寸的图像文件时,会发生 MaxUploadSizeExcced
我有以下代码和@ComponentScan(basePackages = "com.project.shopping"),包结构为 com.project.shopping.Controller co
我尝试运行此程序作为测试,但收到错误“发生了 JNI 错误,请检查您的安装并重试”,然后是“发生了 Java 异常”。关于如何解决这个问题有什么想法吗? package java; public cl
我是一名优秀的程序员,十分优秀!