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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

For more information about handling events, see Consuming 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. 
	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());
	}
	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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

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