Samples Learn how to build and manage business web applications with greater efficiency, speed and ease. CRUD Perform database operations like select, insert, update and delete and the basics of the DataGrid control. JSON Many web services return the results as JSON, a very common format to store and transport data in. Upload & Download Files See how to upload and download files in an application. Call a Web Service How to use a web service in Stadium. Selectable DataGrid Select rows in a DataGrid and execute a specific action on every selected row.