How do I pass data to an ASP.NET WebAPI

Question

I have been working through the new WebAPI over on the asp.net site. I've created a few samples using simple strings that I can GET. I am looking to see if I can now POST and PUT to the service.

I am looking to see how I should add an object to the request that I can then POST or PUT from a .net 3.5 console application. The object I am trying to send is just a simple User class with Name, Surname, and UserID.

From my testing it seems that I can serialize this and send it via the URI but that hardly seems correct. I notice that these requests have headers, can I put the data in there?

Aliostad · Accepted Answer · 2012-04-27 09:27:19Z

4

Using .NET 3.5, there are not many elegant options I think but this code using WebClient works (you need adding reference to System.Web.Extensions):

WebClient client = new WebClient();
JavaScriptSerializer serializer = new JavaScriptSerializer();
var data = serializer.Serialize(new {Name = "Ali", Title = "Ostad"});
client.Headers[HttpRequestHeader.ContentType] = "application/json";
var downloadString = client.UploadString("http://localhost:59174/api/values", data); // value is "Ali"

And here is controller action:

// POST /api/values
public string Post(JsonValue value)
{
    return value.AsDynamic().Name;
}

answered Apr 27, 2012 at 9:27

Aliostad

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Ben Foster · Accepted Answer · 2012-04-27 08:44:05Z

1

Check out the HttpClient on NuGet. This makes it easy to do most things over http.

And here's an example of using it.

answered Apr 27, 2012 at 8:44

Ben Foster

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2 Comments

deanvmc Over a year ago

Does this client work with .net 3.5 (Winforms / Console / WPF / Silverlight) ?

Ben Foster Over a year ago

As far as I know the HttpClient (part of WCF Web Api) is .NET 4 but an older build is available for .net 3.5 - see stackoverflow.com/questions/8257652/…

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