Hello,
I have implemented a web service for for the GroupDocs viewer using version 2.x. I would like to know if you have a sample solution or documentation that uses version 3.0 to expose a web service for the viewer. My implementation is similar to this post: http://groupdocs.com/docs/display/viewernet/How+to+Build+an+ASP.NET+WebForms+HTML5+Document+Viewer+using+web+services