What’s new in WCF 4 lecture for the .NET Developers User Group
Two days ago I gave a lecture at the Israeli .Net Developers User Group (IDNDUG) in Microsoft. The lecture went great and there were a lot of good questions.
The presentation and the code samples are available for public download at the following link.
During the lecture someone asked me a question regarding support for JSONP (JSON with padding) in WCF RESTful calls, and I answered that as far as I know there is no such support. But… since I’m quite senile I forgot that I did see such support with WCF and the WebHttpBinding.
To use JSONP with WCF you’ll need to do the following:
1. Enable the crossDomainScriptAccessEnabled attribute in the webHttpBinding binding configuration element:
<bindings>
<webHttpBinding>
<binding crossDomainScriptAccessEnabled="true"/>
</webHttpBinding>
</bindings>
2. When calling the service, add the callback key to your query string, for example:
http://localhost/myService/getSomething?id=7&callback=getSomethingCallback
3. Make sure your service returns responses in the JSON format, either by settings it in the service code, or by setting it in the webHttp behavior configuration (sample code and configuration can be found in my presentation samples).