Enables you to supply any server data that can then be parsed on the client.
The event handler receives an argument of the CustomJSPropertiesEventHandler type.
In some instances, it is necessary to obtain server information on the client. The CustomJSProperties event enables you to declare temporary client properties. Once declared, a property can be accessed on the client.
To add new properties, use the event parameter's CustomJSPropertiesEventArgs.Properties property, which represents a collection of property names and their values. The only requirement is that property names must begin with the 'cp' prefix, to avoid rewriting the ASPxWebDocumentViewer's base properties.
Typically, using a specifically introduced ASPxWebDocumentViewer.JSProperties property might be more convenient and efficient than handling the CustomJSProperties event, which is mostly declared for backward compatibility.