RadControls for ASP.NET AJAX The RadCalendar controls all raise server-side events, which you can use to customize the parts of the control as they are created, or to respond in the code-behind when the user makes a change.
RadCalendar
RadCalendar exposes four server-side events:
DayRender occurs immediately before the calendar renders the cell for a single day in the day matrix.
HeaderCellRender occurs immediately before the calendar renders a cell in the column or row headers (or the view selector).
SelectionChanged occurs when the user changes the current selection in the calendar. This event does not fire unless the AutoPostBack property is True.
DefaultViewChanged occurs when the user changes the current view using the navigation controls in the title bar. This event does not fire unless the AutoPostBack property is True.
RadDatePicker, RadTimePicker, RadDateTimePicker and RadMonthYearPicker
The RadDatePicker, RadTimePicker,
RadDateTimePicker and RadMonthYearPicker
controls expose the following two server-side events:
ChildrenCreated occurs when the
child controls (the input area, popup buttons, and embedded calendar or time view controls)
are created.
SelectedDateChanged occurs when
the user changes the value of the control, either when input area loses focus after the user
has typed a new value, or when the user selects a new value in the popup calendar or time view
control. This event does not fire unless the AutoPostBack property is
True (RadDatePicker, RadTimePicker and RadMonthYearPicker) or the AutoPostBackControl property is not "None" (RadDateTimePicker).
In addition, RadTimePicker and RadDateTimePicker
controls expose two additional server-side events for configuring the embedded time
view control:
The RadMonthYearPicker control also exposes additional server-side
event for customizing the RadMonthYearTableView:
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When setting the AutoPostBack or AutoPostBackControl properties to enable server-side events that respond when the user makes a change, you can still have the smooth performance of client mode by making the postback asynchronous. To do this, use a RadAjaxManager control.
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Postbacks
By default, none of the RadCalendar controls cause postbacks when the user selects or deselects a date. This means that some of the server-side events are not raised.
The following table indicates the properties you can use to enable postbacks on the different RadCalendar controls, allowing their server-side events to occur:
Control | Property | Events | Comments |
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RadCalendar | AutoPostBack | DefaultViewChanged SelectionChanged | When AutoPostBack is true, a postback occurs both when the user changes the selection and when the user clicks on a navigation control to change the view. |
RadDatePicker | AutoPostBack | SelectedDateChanged DateInput.TextChanged | When AutoPostBack is true, a postback only occurs when the user changes the selected date. |
RadTimePicker | AutoPostBack | SelectedDateChanged DateInput.TextChanged | When AutoPostBack is true, a postback occurs when the user changes the selected time. |
RadMonthYearPicker | AutoPostBack | SelectedDateChanged DateInput.TextChanged | When AutoPostBack is true, a postback only occurs when the user changes the selected date. |
RadDateTimePicker | AutoPostBackControl | SelectedDateChanged DateInput.TextChanged | AutoPostBack can have any of the following values: "None": no postbacks occur when the user changes the selection. "Both": a postback occurs when the user changes the selection. "TimeView": a postback occurs when the user types a new value in the input area or selects a time in the popup time view. "Calendar": a postback occurs when the user types a new value in the input area or selects a date in the popup calendar.
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