BeforeToolDropdown Event (ToolBase)

Occurs before a tool drops down.
Public Event BeforeToolDropdown As BeforeToolDropdownEventHandler
public event BeforeToolDropdownEventHandler BeforeToolDropdown
Event Data

The event handler receives an argument of type BeforeToolDropdownEventArgs containing data related to this event. The following BeforeToolDropdownEventArgs properties provide information specific to this event.

Cancel (Inherited from System.ComponentModel.CancelEventArgs) 
SourceControl The source control that triggered the context menu popup or null.
Tool (Inherited from Infragistics.Win.UltraWinToolbars.CancelableToolEventArgs)The tool.

This event is generated before a PopupToolBase-derived tool closes.

The AfterToolDropdown event is generated after a tool is dropped down.

The AfterToolCloseup event is generated after a tool is closed.

The following code demonstrates how to access the information passed in the event arguments of the BeforeToolDropdown event and conditionally cancel the event.

For an overview of how to handle events in Visual Basic or Visual C#, see Event Handlers in Visual Basic and Visual C#. For specific information and code examples illustrating how to consume events in your application, see Consuming Events in the .NET Framework Developer's Guide.

Imports System.Diagnostics
Imports Infragistics.Win
Imports Infragistics.Win.UltraWinToolbars

	Private Sub UltraToolbarsManager1_BeforeToolDropdown(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinToolbars.BeforeToolDropdownEventArgs) Handles UltraToolbarsManager1.BeforeToolDropdown

		Dim dr As DialogResult = MessageBox.Show(Me, "The tool with key '" + e.Tool.Key + "' is about to be dropped down. Do you want to cancel the dropdown??", "Cancelable Toolbar Event", MessageBoxButtons.YesNo)

		If dr = DialogResult.Yes Then
			e.Cancel = True
		End If

	End Sub
using System.Diagnostics;
using Infragistics.Win;
using Infragistics.Win.UltraWinToolbars;

		private void ultraToolbarsManager1_BeforeToolDropdown(object sender, Infragistics.Win.UltraWinToolbars.BeforeToolDropdownEventArgs e)

			DialogResult dr =  MessageBox.Show(this, "The tool with key '" + e.Tool.Key + "' is about to be dropped down. Do you want to cancel the dropdown??", "Cancelable Toolbar Event", MessageBoxButtons.YesNo);

			if (dr == DialogResult.Yes)
				e.Cancel = true;


Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also