The event handler method receives the following arguments:
sender
A Picker instance, which is the source of the event. This object will be passed to the handler function as the first argument.
args
An EventArgs instance, which contains event data. This object will be passed to the handler function as the second argument.

The following code handles the dropDownShow event of a DateTimePicker:

JavaScript  Copy Code
// Handle the dropDownShow event. dateTimePicker.dropDownShow.addEventListener(handleDropDownShow); // This is the handler function of the dropDownShow event. function handleDropDownShow(sender, args) {   if(sender.state === u.ValidationState.Valid)     {       //do something     } }

Picker Members
Picker Class
MindFusion.Common.UI Namespace