# DefaultViewChanged

The [ASP NET AJAX Calendar](https://www.telerik.com/products/aspnet-ajax/calendar.aspx) control provides the **DefaultViewChanged** server event, which is raised when the **AutoPostBack** property is set to **true**, and the user changes the currently visible view using the navigation controls in the title bar.

The **DefaultViewChanged** event handler receives two arguments:

1. The **RadCalendar**control whose view was just changed. This argument is of type object, but can be cast to the **RadCalendar** type.

2. A **DefaultViewChangedEventArgs** object. This object has the following two properties:

   * **OldView** is the **CalendarView** object for the view that was current before the change.

   * **NewView** is the **CalendarView** object for the current view after the change.

Use the **DefaultViewChanged** event handler to respond to changes in the dates the calendar displays:

```C#
protected void RadCalendar1_DefaultViewChanged(object sender, DefaultViewChangedEventArgs e)
{
    if (e.OldView.ViewStartDate < e.NewView.ViewStartDate)
        Label1.Text = e.OldView.TitleContent + " -> " + e.NewView.TitleContent;
    else
        Label1.Text = e.NewView.TitleContent + " <- " + e.OldView.TitleContent;
}
```

```VB.NET
Protected Sub RadCalendar1_DefaultViewChanged(ByVal sender As Object, ByVal e As DefaultViewChangedEventArgs) Handles RadCalendar1.DefaultViewChanged
    If e.OldView.ViewStartDate < e.NewView.ViewStartDate Then
        Label1.Text = e.OldView.TitleContent + " -> " + e.NewView.TitleContent
    Else
        Label1.Text = e.NewView.TitleContent + " <- " + e.OldView.TitleContent
    End If
End Sub
```

## See Also

* [Server-Side Events Basics](https://www.telerik.com/products/aspnet-ajax/documentation/controls/calendar/server-side-programming/events/overview)

* [OnCalendarViewChanging](https://www.telerik.com/products/aspnet-ajax/documentation/controls/calendar/client-side-programming/events/oncalendarviewchanging)

* [OnCalendarViewChanged](https://www.telerik.com/products/aspnet-ajax/documentation/controls/calendar/client-side-programming/events/oncalendarviewchanged)