DateTimePicker.DropDown DateTimePicker.DropDown DateTimePicker.DropDown DateTimePicker.DropDown Event

정의

드롭다운 달력이 표시될 때 발생합니다.Occurs when the drop-down calendar is shown.

public:
 event EventHandler ^ DropDown;
public event EventHandler DropDown;
member this.DropDown : EventHandler 
Public Custom Event DropDown As EventHandler 

예제

다음 코드 예제에서는 처리를 DropDown 의 이벤트를 DateTimePicker 하 고 사용 하는 MinDateTimeMaxDateTime 필드.The following code example demonstrates handling the DropDown event of a DateTimePicker and using the MinDateTime and MaxDateTime fields. 포함 된 폼에서이 예제에서는 다음 코드를 붙여넣습니다를 실행 하는 DateTimePicker 라는 DateTimePicker1합니다.To run this example paste the following code in a form that contains a DateTimePicker named DateTimePicker1.

// When the calendar drops down, display a MessageBox indicating 
// that DateTimePicker will not accept dates before MinDateTime or 
// after MaxDateTime. Use a StringBuilder object to build the string
// for efficiency.
void DateTimePicker1_DropDown( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   System::Text::StringBuilder^ messageBuilder = gcnew System::Text::StringBuilder;
   messageBuilder->Append( "Choose a date after: " );
   messageBuilder->Append( DateTimePicker::MinDateTime.ToShortDateString() );
   messageBuilder->Append( " and a date before: " );
   messageBuilder->Append( DateTimePicker::MaxDateTime.ToShortDateString() );
   MessageBox::Show( messageBuilder->ToString() );
}

// When the calendar drops down, display a MessageBox indicating 
// that DateTimePicker will not accept dates before MinDateTime or 
// after MaxDateTime. Use a StringBuilder object to build the string
// for efficiency.
private void DateTimePicker1_DropDown(object sender, 
	System.EventArgs e)
{

	System.Text.StringBuilder messageBuilder = 
		new System.Text.StringBuilder();
	messageBuilder.Append("Choose a date after: ");
	messageBuilder.Append
		(DateTimePicker.MinDateTime.ToShortDateString());
	messageBuilder.Append(" and a date before: ");
	messageBuilder.Append
		(DateTimePicker.MaxDateTime.ToShortDateString());
	MessageBox.Show(messageBuilder.ToString());
}

' When the calendar drops down, display a MessageBox indicating 
' that DateTimePicker will not accept dates before MinDateTime or 
' after MaxDateTime. Use a StringBuilder object to build the string
' for efficiency.
Private Sub DateTimePicker1_DropDown(ByVal sender As Object, _
    ByVal e As EventArgs) Handles DateTimePicker1.DropDown

    Dim messageBuilder As New System.Text.StringBuilder
    messageBuilder.Append("Choose a date after: ")
    messageBuilder.Append(DateTimePicker.MinDateTime.ToShortDateString)
    messageBuilder.Append(" and a date before: ")
    messageBuilder.Append(DateTimePicker.MaxDateTime.ToShortDateString)
    MessageBox.Show(messageBuilder.ToString())
End Sub

설명

이벤트 처리에 대한 자세한 내용은 이벤트 처리 및 발생 을 참조하십시오.For more information about handling events, see Handling and Raising Events.

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