Can't find how to use HttpContent

Question

I am trying to use HttpContent:

HttpContent myContent = HttpContent.Create(SOME_JSON);

...but I am not having any luck finding the DLL where it is defined.

First, I tried adding references to Microsoft.Http as well as System.Net, but neither is in the list. I also tried adding a reference to System.Net.Http but the HttpContent class is not available.

So, can anyone tell me where I can find the HttpContent class?

Answer 1

Just use...

var stringContent = new StringContent(jObject.ToString());
var response = await httpClient.PostAsync("http://www.sample.com/write", stringContent);

Or,

var stringContent = new StringContent(JsonConvert.SerializeObject(model), Encoding.UTF8, "application/json");
var response = await httpClient.PostAsync("http://www.sample.com/write", stringContent);

Answer 2

To take 6footunder's comment and turn it into an answer, HttpContent is abstract so you need to use one of the derived classes:

Answer 3

I'm pretty sure the code is not using the System.Net.Http.HttpContent class, but instead Microsoft.Http.HttpContent. Microsoft.Http was the WCF REST Starter Kit, which never made it out preview before being placed in the .NET Framework. You can still find it here: http://aspnet.codeplex.com/releases/view/24644

I would not recommend basing new code on it.

Answer 4

The class is listed as being present in the System.Net.Http assembly. Note that this class is new for .NET 4.5, so you need to be using that version of the BCL.

Answer 5

For JSON Post:

var stringContent = new StringContent(json, Encoding.UTF8, "application/json");
var response = await httpClient.PostAsync("http://www.sample.com/write", stringContent);

Non-JSON:

var stringContent = new FormUrlEncodedContent(new[]
{
    new KeyValuePair<string, string>("field1", "value1"),
    new KeyValuePair<string, string>("field2", "value2"),
});
var response = await httpClient.PostAsync("http://www.sample.com/write", stringContent);

https://blog.pedrofelix.org/2012/01/16/the-new-system-net-http-classes-message-content/

Answer 6

The System.Net.Http namespace (where HttpContent class resides) is new to .Net 4.5, are you using a VS2012 RC?

Otherwise, you wouldn't have access to this.