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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


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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