Question

我遇到一个大问题，就是不让我访问我的网络应用程序。恢复所有，我在一台机器上使用带有.NET framework 4.5.1的VS2013与asp.net开发了一个web api。我已经发布了应用程序，并且我放入了需要与Windows Server 2008和IIS 7一起使用的服务器。当我尝试使用我的应用程序时，任何使用api链接的请求都会返回错误500（内部服务器错误）。为什么呢？

我已经在互联网上阅读了很多教程，我已经尝试了所有这些教程，但它仍然无法正常工作。我已经尝试从我的web.config中删除一些内容并添加其他内容，但每次我更改时，另一个不同的错误都会让我回复“OWIN manager is not configured”，就像那样。

下面你可以看到我的web.config中的重要部分。

<appSettings>
        <add key="owin:AppStartup" value="MyNamespace.Startup" />
        <add key="owin:AutomaticAppStartup" value="true" />
    </appSettings>
    <system.web>
        <identity impersonate="false" />
        <compilation targetFramework="4.5.1" />
        <httpRuntime targetFramework="4.5.1" maxRequestLength="51200" executionTimeout="3600" />
        <customErrors mode="Off" />
    </system.web>

<modules runAllManagedModulesForAllRequests="true">
            <remove name="FormsAuthenticationModule" />
            <remove name="UrlRoutingModule-4.0" /> 
            <add name="UrlRoutingModule-4.0" type="System.Web.Routing.UrlRoutingModule" preCondition="" /> 
        </modules>

        <handlers>
            <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
            <remove name="OPTIONSVerbHandler" />
            <remove name="TRACEVerbHandler" />
            <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
        </handlers>

我现在面临的问题是：

<Error>
<Message>An error has occurred.</Message>
<ExceptionMessage>
Object reference not set to an instance of an object.
</ExceptionMessage>
<ExceptionType>System.NullReferenceException</ExceptionType>
<StackTrace>
at PS_VirtualCalendar.Services.Controllers.LinksController.GetLinks_All() at lambda_method(Closure , Object , Object[] ) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Controllers.AuthenticationFilterResult.<ExecuteAsync>d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()
</StackTrace>
</Error>

更新

这是我们可以找到问题的代码。记住这个错误正在返回，因为我正在另一台服务器上发布该应用程序。

[HttpGet]
            [AllowAnonymous]
            [ResponseType(typeof(IEnumerable<ent_Links>))]
            public IEnumerable<ent_Links> GetLinks_All()
            {
                List<ent_Links> list_Links;
                ent_Links oEnt_Links;

                try
                {
                    using (BL_Links _srv = new BL_Links())
                    {
                        oEnt_Links = new ent_Links();

                        list_Links = _srv.BL_Links_GetList(oEnt_Links);
                    }
                }
                catch (Exception e)
                {
                    throw e;
                }

                return list_Links;
            }

你们可以帮帮我吗？关于我能做什么的任何建议？我真的需要你的帮助。

提前多多感谢！

Web API应用程序ASP.NET无法正常工作

0 个答案: