Szerkesztés

Megosztás a következőn keresztül:

ISelectionService.SelectionChanging Event

  • Reference

Definition

Namespace:
System.ComponentModel.Design
Assembly:
System.ComponentModel.TypeConverter.dll
Assembly:
System.dll
Assembly:
netstandard.dll

Occurs when the current selection is about to change.

public:
 event EventHandler ^ SelectionChanging;
event EventHandler SelectionChanging;
member this.SelectionChanging : EventHandler 
Event SelectionChanging As EventHandler

Event Type

EventHandler

Examples

The following example illustrates how to use the SelectionChanging event.

// Add SelectionChanging event handler to event
m_selectionService->SelectionChanging += gcnew EventHandler( this, &ComponentClass::OnSelectionChanging );

// Add SelectionChanging event handler to event
m_selectionService.SelectionChanging += new EventHandler(OnSelectionChanging);

' Add SelectionChanging event handler to event
AddHandler m_selectionService.SelectionChanging, AddressOf OnSelectionChanging

/* This is the OnSelectionChanging handler method.  This method calls
    OnUserChange to display a message that indicates the name of the
    handler that made the call and the type of the event argument. */
void OnSelectionChanging( Object^ /*sender*/, EventArgs^ args )
{
   OnUserChange( "OnSelectionChanging", args->ToString() );
}

/* This is the OnSelectionChanging handler method.  This method calls
    OnUserChange to display a message that indicates the name of the
    handler that made the call and the type of the event argument. */
private void OnSelectionChanging(object sender, EventArgs args) 
{
    OnUserChange("OnSelectionChanging", args.ToString());
}

' This is the OnSelectionChanging handler method.  This method calls
'   OnUserChange to display a message that indicates the name of the
'   handler that made the call and the type of the event argument. 
 Private Sub OnSelectionChanging(ByVal sender As Object, ByVal args As EventArgs)
    OnUserChange("OnSelectionChanging", args.ToString())
 End Sub

Remarks

Minimize processing when handling this event, because processing that occurs within this event handler can significantly affect the overall performance of the form designer.

Applies to

See also