Monday, May 2, 2011

WCF DataServices and JSON format

WCF data services by default uses the response type as XML in ATOM format. I thought there will be some configuration in web.config to change the response type to JSON. You really don't have to do anything in the web.config to change the response type. All you need to do is two things.

1. Set the response type to JSON on WEBGet method of your data service as shown below.

[WebGet(ResponseFormat = WebMessageFormat.Json)]
public IQueryable<Test> GetTests()
{
var tests = BuildTests();
return tests.AsQueryable();
}


2. On the client side while requesting a data service set the HTTP header "Accept" with a value "application/json"

Your data service will now returns JSON as a response to the request.

Sunday, May 1, 2011

Installing entity framework from Visual Studio

I was playing around with Entity Framework in .Net and when I created a project to use entity framework few library references were missing then I started looking @ if the installation was proper. This is when I discovered how to use the Package Manager in visual studio 2010 to install Entity Framework.

From within your Visual Studio 2010, go to Tools > Library Package Manager > Package Manager Console.

In the console, after the "PM>" prompt, type

install-package entityframework

you are all set to use entity framework.