Binding to route value and CustomMediaTypeFormatter : The Official Microsoft ASP.NET Forums

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Binding to route value and CustomMediaTypeFormatter

Feb 17, 2012 10:03 PM|LINK

This works:

public Task<HttpResponseMessage> UpdateOrder()
        {
            int orderId = Convert.ToInt32(this.Request.GetRouteData().Values["orderId"]);

But this:

        public Task<HttpResponseMessage> UpdateOrder(int orderId)
        {
            //int orderId = Convert.ToInt32(this.Request.GetRouteData().Values["orderId"]);

Causes this exception to be returned

"{\"ExceptionType\":\"System.InvalidOperationException\",\"Message\":\"No 'MediaTypeFormatter' is available to read an object of type 'Int32' with the media type 'application\\/vnd.weborder+xml'.\",\"StackTrace\":\"   at System.Net.Http.ObjectContent.SelectAndValidateReadFormatter(Boolean acceptNullFormatter)\\u000d\\u000a   at System.Net.Http.ObjectContent.ReadAsyncInternal[T](Boolean allowDefaultIfNoFormatter)\\u000d\\u000a   at System.Web.Http.ModelBinding.RequestContentReader.ReadWholeBodyAsync(HttpActionContext actionContext, Type modelType)\\u000d\\u000a   at System.Web.Http.ModelBinding.RequestContentReader.ReadContentAsync(HttpActionContext actionContext)\\u000d\\u000a   at System.Web.Http.ModelBinding.DefaultActionValueBinder.BindValuesAsync(HttpActionContext actionContext, CancellationToken cancellationToken)\\u000d\\u000a   at System.Web.Http.ApiController.<>c__DisplayClass3.<ExecuteAsync>b__0()\\u000d\\u000a   at System.Web.Http.ApiController.ExecuteAsync(HttpControllerContext controllerCon
text, CancellationToken cancellationToken)\\u000d\\u000a   at System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsyncInternal(HttpRequestMessage request, CancellationToken cancellationToken)\\u000d\\u000a   at System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)\"}"

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Kiran Challa

Participant

1442 Points

281 Posts

Microsoft

Re: Binding to route value and CustomMediaTypeFormatter

Feb 17, 2012 10:17 PM|LINK

I am not sure about the route value binding part, but regarding the mediatypeformatter, you have added it as part of the Formatters list on the Configuration object...right?

Thanks,
Kiran Challa

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Re: Binding to route value and CustomMediaTypeFormatter

Feb 17, 2012 11:15 PM|LINK

I doubt this is the case, but I know that for some properties, once they are model bound, they are removed from the contextual elements. However, wrt RouteData, I would think this a bug.

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Re: Binding to route value and CustomMediaTypeFormatter

Feb 17, 2012 11:19 PM|LINK

What does your route table look like? Is the route data for the orderId parameter present?

Daniel Roth
Senior Program Manager
ASP.NET

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Re: Binding to route value and CustomMediaTypeFormatter

Feb 18, 2012 09:30 AM|LINK

Chris did you add your custom vnd.mediatype names to the supported collection on the Json formatter? At least in preview 6 this error happens because the framework can't find a formatter to deserialize your media type. I solved that by adding all the media type in my system to the formatter, in my case using reflection (I store the media type on the actions).

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chrisortman

Member

38 Points

23 Posts

Re: Binding to route value and CustomMediaTypeFormatter

Feb 20, 2012 01:29 PM|LINK

Yes

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chrisortman

Member

38 Points

23 Posts

Re: Binding to route value and CustomMediaTypeFormatter

Feb 20, 2012 01:30 PM|LINK

I believe so because I am able to manually pull the value out of the GetRouteData.Values dictionary.

This is how I map the route

_config.Routes.MapHttpRoute("UpdateOrderApiUrl", "api/orders/{orderId}",
                                    new { controller = "OrdersApi", action = "UpdateOrder" }, new
                                    {
                                        httpMethod = new HttpMethodConstraint(HttpMethod.Post)
                                    });