OnAfterDropDown Method (UltraCalendarCombo)

Raises the AfterDropDown event after the DropDown has been displayed.

Syntax

Visual Basic

'Declaration
 
Protected Overridable Sub OnAfterDropDown( _
   ByVal e As EventArgs _
) 

C#

protected virtual void OnAfterDropDown( 
   EventArgs e
)

Parameters

e

An System.EventArgs that provides data for the event.

Remarks

Raising an event invokes the event handler through a delegate.

The OnAfterDropDown method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors: When overriding OnAfterDropDown in a derived class, be sure to call the base class's OnAfterDropDown method so that registered delegates receive the event.

Example

This example displays the control's existing value after the dropdown calendar drops down.

For an overview of how to handle events in Visual Basic or Visual C#, see Event Handlers in Visual Basic and Visual C#. For specific information and code examples illustrating how to consume events in your application, see Consuming Events in the .NET Framework Developer's Guide.

Visual Basic

Private Sub ultraCalendarCombo1_AfterDropDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles ultraCalendarCombo1.AfterDropDown

    Dim newValue As String

    If (Me.ultraCalendarCombo1.Value Is Nothing) Then
        newValue = "Nothing"
    Else
        newValue = Me.ultraCalendarCombo1.Value.ToString()
    End If

    System.Diagnostics.Debug.WriteLine("AfterDropDown: Value = " + newValue)

End Sub

C#

private void ultraCalendarCombo1_AfterDropDown(object sender, System.EventArgs e)
{

	string newValue = string.Empty;

	if ( this.ultraCalendarCombo1.Value == null )
		newValue = "null";
	else
		newValue = this.ultraCalendarCombo1.Value.ToString();

	System.Diagnostics.Debug.WriteLine("AfterDropDown: Value = " + newValue);
		
}

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2