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MenuItem.MeasureItem Event

Occurs when the menu needs to know the size of a menu item before drawing it.

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

public event MeasureItemEventHandler MeasureItem

In order for this event to be raised, you must have the OwnerDraw property of the menu item set to true. This event is raised before owner drawn menus are drawn to allow for the size of the menu item to be drawn to be specified. For more information about handling events, see Handling and Raising Events.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the MeasureItem event. This report helps you to learn when the event occurs and can assist you in debugging.

To run the example code, paste it into a project that contains an instance of type MenuItem named MenuItem1. Then ensure that the event handler is associated with the MeasureItem event.

private void MenuItem1_MeasureItem(Object sender, MeasureItemEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Graphics", e.Graphics );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Index", e.Index );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "ItemHeight", e.ItemHeight );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "ItemWidth", e.ItemWidth );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "MeasureItem Event" );
}

.NET Framework

Supported in: 4.6, 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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