Sys.CommandEventArgs.commandArgument Property
Gets a value that represents the command argument.
Note
To get or set property values for client API properties, you must call property accessor methods that are named with the get_ and set_ prefixes. For example, to get or set a value for a property such as cancel, you call the get_cancel or set_cancel methods.
var cmdArg = MyCommandEventArgs.get_commandArgument();
Property Value
A value that represents the command argument.