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DateTimePicker::DropDown Event

Occurs when the drop-down calendar is shown.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public:
 event EventHandler^ DropDown {
	void add (EventHandler^ value);
	void remove (EventHandler^ value);
}

For more information about handling events, see Handling and Raising Events.

The following code example demonstrates handling the DropDown event of a DateTimePicker and using the MinDateTime and MaxDateTime fields. 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() );
}
	Drop-Down event of a DateTimePicker, and the MinDateTime and MaxDateTime fields.  To run this example paste
	the following code in a form that contains a DateTimePicker named

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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