Put content in HttpResponseMessage object

Question

Several months ago  Microsoft decided to change up the HttpResponseMessage class  Before  you could simply pass a data type into the constructor  and then return the message with that data  but not anymore   Now  you need to use the Content property to set the content of the message  The problem is that it is of type HttpContent  and I can t seem to find a way to convert a string  for example  to HttpContent   Does anyone know how to deal with this issue  Thanks a lot

User · Accepted Answer

Apparently the new way to do it is detailed here:

http://aspnetwebstack.codeplex.com/discussions/350492

To quote Henrik,

HttpResponseMessage response = new HttpResponseMessage();

response.Content = new ObjectContent<T>(T, myFormatter, "application/some-format");

So basically, one has to create a ObjectContent type, which apparently can be returned as an HttpContent object.

User · Answer

The easiest single-line solution is to use  return new HttpResponseMessage  HttpStatusCode OK    Content    new StringContent   Your message here         For serialized JSON content   return new HttpResponseMessage  HttpStatusCode OK    Content    new StringContent  SerializedString  System Text Encoding UTF8   application json

User · Answer

You can create your own specialised content types   For example one for Json content and one for Xml content  then just assign them to the HttpResponseMessage Content    public class JsonContent   StringContent       public JsonContent string content            this content  Encoding UTF8                   public JsonContent string content  Encoding encoding            base content  encoding   application json                  public class XmlContent   StringContent       public XmlContent string content             this content  Encoding UTF8                   public XmlContent string content  Encoding encoding            base content  encoding   application xml

User · Answer

No doubt that you are correct Florin  I was working on this project  and found that this piece of code   product   await response Content ReadAsAsync lt Product gt       Could be replaced with   response Content   new StringContent string product

User · Answer

Inspired by Simon Mattes  answer  I needed to satisfy IHttpActionResult required return type of ResponseMessageResult   Also using nashawn s JsonContent  I ended up with             return new System Web Http Results ResponseMessageResult              new System Net Http HttpResponseMessage System Net HttpStatusCode OK                                Content   new JsonContent JsonConvert SerializeObject contact  Formatting Indented                     See nashawn s answer for JsonContent

User · Answer

For any T object you can do   return Request CreateResponse lt T gt  HttpStatusCode OK  Tobject

User · Answer

You should create the response using Request CreateResponse   HttpResponseMessage response    Request CreateResponse HttpStatusCode BadRequest   Error message      You can pass objects not just strings to CreateResponse and it will serialize them based on the request s Accept header  This saves you from manually choosing a formatter

User · Answer

For a string specifically  the quickest way is to use the StringContent constructor  response Content   new StringContent  Your response text      There are a number of additional HttpContent class descendants for other common scenarios

[c#] Put content in HttpResponseMessage object?

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