ComponentChangingEventArgs Class
Assembly: System (in system.dll)
'Declaration <ComVisibleAttribute(True)> _ Public NotInheritable Class ComponentChangingEventArgs Inherits EventArgs 'Usage Dim instance As ComponentChangingEventArgs
/** @attribute ComVisibleAttribute(true) */ public final class ComponentChangingEventArgs extends EventArgs
ComVisibleAttribute(true) public final class ComponentChangingEventArgs extends EventArgs
Not applicable.
ComponentChangingEventArgs provides data about a ComponentChanging event. The ComponentChanging event notifies the IComponentChangeService and registered event handlers that a particular component in the current design document is about to be changed. This event provides a widely accessible method to prevent a component from changing.
A ComponentChanging event is raised before a component is changed. This event provides an opportunity for a designer to abort the change. Component designers typically raise the ComponentChanging event automatically. If a property cannot be changed, the method that handles the event can throw an exception. For example, if a designer file is checked into source code control, the handler of this event typically throws an exception if the user refuses to check out the file.
A ComponentChangingEventArgs provides the following information:
-
A Component property that indicates the component that is about to be modified.
-
A Member property that indicates the member that is about to be changed.
The following example demonstrates creating a ComponentChangingEventArgs.
' This example method creates a ComponentChangingEventArgs using the specified arguments. ' Typically, this type of event args is created by a design mode subsystem. Public Function CreateComponentChangingEventArgs(ByVal component As Object, ByVal member As MemberDescriptor) As ComponentChangingEventArgs Dim args As New ComponentChangingEventArgs(component, member) ' The component that is about to change: args.Component ' The member that is about to change: args.Member Return args End Function
// This example method creates a ComponentChangingEventArgs
// using the specified arguments.
// Typically, this type of event args is created by a design mode subsystem.
public ComponentChangingEventArgs CreateComponentChangingEventArgs(
Object component, MemberDescriptor member)
{
ComponentChangingEventArgs args = new
ComponentChangingEventArgs(component, member);
// The component that is about to change: args.Component
// The member that is about to change: args.Member
return args;
} //CreateComponentChangingEventArgs
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.