In my current project, I have to develop a web application which connects to a back-end server.
One of the web pages contains a RadGrid used to display the Participants details (Name, Email, Title, Phone, Mobile).
The user is able to Add, Edit, Delete the Participant details. When the user performs an Add or Edit or Delete the changes will be performed on the data object in the memory.
When the users clicks on the Update button the data object will be submitted into the back-end server.
All RadGrid operations are Server-side operations (instead of Client-side ones).
There is a user requirement if the users attempts to navigate away from this web page and there exists unsaved changes in the data object (i.e. not yet submitted), a message should be displayed asking them if they want to save the changes before proceeding.
Can you please tell me how to implement this?