SelectedDateChanged

RadDateTimePicker provides the SelectedDateChanged server event, which 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 will only fire if the AutoPostBackControl property is not set to "None".

The event handler is not called unless the date and/or time actually changes. If the user makes a change that results in the same value (for example, typing a different string that parses to the same value), a postback occurs but the SelectedDateChanged event handler is not called.

The SelectedDateChanged event handler receives two arguments:

1. The control whose value has just changed. This argument is of type object, but can be cast to the appropriate type.

2. A SelectedDateChangedEventArgs object. This object has the following two properties:

   • OldDate is the value before the change.

   • NewDate is the value after the change.

You can use this event to respond in server-side code when the user changes the value:

protected void RadDateTimePicker1_SelectedDateChanged(object sender, SelectedDateChangedEventArgs e)
{
    Label1.Text = "Change from ";
    if (e.OldDate == null)
        Label1.Text += "nothing";
    else Label1.Text += e.OldDate.ToString();
    Label1.Text += " to ";
    if (e.NewDate == null)
        Label1.Text += "nothing";
    else Label1.Text += e.NewDate.ToString();
}       

Protected Sub RadDateTimePicker1_SelectedDateChanged(ByVal sender As Object, ByVal e As SelectedDateChangedEventArgs) Handles RadDateTimePicker1.SelectedDateChanged
    Label1.Text = "Change from "
    If e.OldDate = Nothing Then
        Label1.Text += "nothing"
    Else
        Label1.Text += e.OldDate.ToString()
    End If
    Label1.Text += " to "
    If e.NewDate = Nothing Then
        Label1.Text += "nothing"
    Else
        Label1.Text += e.NewDate.ToString()
    End If
End Sub

See Also

• Server-side Events Overview