public string OnPopupClosing { get; set; }

Public Property OnPopupClosing As String
	Get
	Set

public:
property String^ OnPopupClosing {
	String^ get ();
	void set (String^ value);
}

member OnPopupClosing : string with get, set

Property Value

There can be some conditions you do want not to close the calendar popup on click over it. Then you should cancel the event either by return false; or set its argument args.CancelClose = true;

            <script type="text/javascript">
function Closing(sender, args)
{
    args.CancelClose = true;
    //or
    return false;
}
</script>
<kaxCln:KaxDatePicker ID="KaxDatePicker1" runat="server">
    <ClientEvents OnPopupClosing="Closing"/>
</kaxCln:KaxDatePicker>   
            

            [AspNet/ASCX]        
            

            <script type="text/javascript">
function OnPopupClosing(datepickerInstance, args)
{
   ......
}
</script>

<kaxcln:KaxDatePicker ID="KaxDatePicker1" runat="server">
   <ClientEvents OnPopupClosing="OnPopupClosing" />
</kaxcln:KaxDatePicker>
            

Reference