Parameter Constructor expected or exception is thrown

[darewreck54]

It seems that with one of my controller, it requires that you have a parameter less Constructor. If one isn't present, an exception will be thrown when you try to load the swagger UI. Is this a specific requirement for using swashbuckle Odata?

500 : {
"Message": "An error has occurred.",
"ExceptionMessage": "An error occurred when trying to create a controller of type 'ProductsController'. 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 Swashbuckle.OData.Descriptions.HttpRequestMessageExtensions.GetHttpActionDescriptor(HttpRequestMessage request)\r\n at Swashbuckle.OData.Descriptions.SwaggerRouteStrategy.GetActionDescriptors(HttpMethod httpMethod, Operation potentialOperation, String potentialPathTemplate, ODataRoute oDataRoute, HttpConfiguration httpConfig)\r\n at Swashbuckle.OData.Descriptions.SwaggerRouteStrategy.GetActionDescriptors(SwaggerRoute potentialSwaggerRoute, HttpConfiguration httpConfig)\r\n at Swashbuckle.OData.Descriptions.SwaggerRouteStrategy.<>c__DisplayClass3_0.b__1(SwaggerRoute potentialSwaggerRoute)\r\n at System.Linq.Enumerable.d__12.MoveNext()\r\n at System.Linq.Enumerable.<SelectManyIterator>d__12.MoveNext()\r\n at System.Linq.Enumerable.d__12.MoveNext()\r\n at System.Linq.Enumerable.<DistinctIterator>d__11.MoveNext()\r\n at System.Collections.Generic.List1..ctor(IEnumerable1 collection)\r\n at System.Linq.Enumerable.ToList[TSource](IEnumerable1 source)\r\n at Swashbuckle.OData.CollectionExtentions.ToCollection[T](IEnumerable1 source)\r\n at Swashbuckle.OData.Descriptions.ODataApiExplorer.GetApiDescriptions()\r\n at System.Lazy1.CreateValue()\r\n at System.Lazy1.LazyInitValue()\r\n at System.Lazy1.get_Value()\r\n at Swashbuckle.OData.Descriptions.ODataApiExplorer.get_ApiDescriptions()\r\n at Swashbuckle.OData.ODataSwaggerProvider.GetApiDescriptionsFor(String apiVersion)\r\n at Swashbuckle.OData.ODataSwaggerProvider.GetSwagger(String rootUrl, String apiVersion)\r\n at Swashbuckle.Application.SwaggerDocsHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)\r\n at System.Net.Http.HttpMessageInvoker.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)\r\n at System.Web.Http.Dispatcher.HttpRoutingDispatcher.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)\r\n at System.Net.Http.DelegatingHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)\r\n at System.Web.Http.Cors.CorsMessageHandler.<>n__FabricatedMethod3(HttpRequestMessage , CancellationToken )\r\n at System.Web.Http.Cors.CorsMessageHandler.<SendAsync>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 System.Runtime.CompilerServices.TaskAwaiter1.GetResult()\r\n at System.Web.Http.HttpServer.d__0.MoveNext()",
"InnerException": {
"Message": "An error has occurred.",
"ExceptionMessage": "Type ProductsController' does not have a default constructor",
"ExceptionType": "System.ArgumentException",
"StackTrace": " at System.Linq.Expressions.Expression.New(Type type)\r\n at System.Web.Http.Internal.TypeActivator.Create[TBase](Type instanceType)\r\n at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator(HttpRequestMessage request, Type controllerType, Func`1& activator)\r\n at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)"
}
} http://localhost:4448/swagger/docs/v1

Thanks,
D

[darewreck54]

Sorry please delete this. This was an issue with my own code.