ComponentChangedEventHandler Delegate
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ComponentChangedEventHandler Delegate

 

Represents the method that will handle a ComponentChanged event.

Namespace:   System.ComponentModel.Design
Assembly:  System (in System.dll)

[ComVisibleAttribute(true)]
[HostProtectionAttribute(SecurityAction.LinkDemand, SharedState = true)]
public delegate void ComponentChangedEventHandler(
	object sender,
	ComponentChangedEventArgs e
)

Parameters

sender
Type: System.Object

The source of the event.

e
Type: System.ComponentModel.Design.ComponentChangedEventArgs

A ComponentChangedEventArgs that contains the event data.

When you create a ComponentChangedEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see NIB: Events and Delegates.

A ComponentChanged event will not occur during the loading or unloading of a form because changes are expected during these operations.

This example demonstrates registering a ComponentChangedEventHandler and handling the ComponentChanged event.

public void LinkComponentChangedEvent(IComponentChangeService changeService)
{
    // Registers an event handler for the ComponentChanged event.
    changeService.ComponentChanged += new ComponentChangedEventHandler(this.OnComponentChanged);            
}

private void OnComponentChanged(object sender, ComponentChangedEventArgs e)
{
    // Displays changed component information on the console.
    Console.WriteLine("Type of the component that has changed: "+e.Component.GetType().FullName);      
    Console.WriteLine("Name of the member of the component that has changed: "+e.Member.Name);            
    Console.WriteLine("Old value of the member: "+e.OldValue.ToString());
    Console.WriteLine("New value of the member: "+e.NewValue.ToString());
}

.NET Framework
Available since 1.1
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