Bewerken

Share via

ListView.BeforeLabelEdit Event

  • Reference

Definition

Namespace:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll

Occurs when the user starts editing the label of an item.

public:
 event System::Windows::Forms::LabelEditEventHandler ^ BeforeLabelEdit;
public event System.Windows.Forms.LabelEditEventHandler BeforeLabelEdit;
public event System.Windows.Forms.LabelEditEventHandler? BeforeLabelEdit;
member this.BeforeLabelEdit : System.Windows.Forms.LabelEditEventHandler 
Public Custom Event BeforeLabelEdit As LabelEditEventHandler

Event Type

LabelEditEventHandler

Examples

The following code example demonstrates handling the BeforeLabelEdit event and using the LabelEditEventArgs.Item and LabelEditEventArgs.CancelEdit properties. To run the example, paste the following code into a form that contains a ListView control named ListView1 and populated with at least three items. Ensure the event handler in the example is associated with its event.

void ListView1_BeforeLabelEdit( Object^ sender,
   System::Windows::Forms::LabelEditEventArgs^ e )
{
   // Allow all but the first two items of the list to 
   // be modified by the user.
   if ( e->Item < 2 )
   {
      e->CancelEdit = true;
   }
}

private void ListView1_BeforeLabelEdit(object sender, 
    System.Windows.Forms.LabelEditEventArgs e)
{
    // Allow all but the first two items of the list to 
    // be modified by the user.
    if (e.Item<2)
    {
        e.CancelEdit = true;
    }
}


Private Sub ListView1_BeforeLabelEdit(ByVal sender As Object, _
    ByVal e As System.Windows.Forms.LabelEditEventArgs) _
    Handles ListView1.BeforeLabelEdit

    ' Allow all but the first two items of the list to be modified by
    ' the user.
    If (e.Item < 2) Then
        e.CancelEdit = True
    End If
End Sub

Remarks

The BeforeLabelEdit event occurs when the user starts modifying the text for an item. If the event handler cancels this event, the user cannot edit the text. You can use this event to prevent the user from editing specific items in the ListView control. If the LabelEdit property of the ListView control is set to false, the BeforeLabelEdit event is not raised; all user attempts to edit item labels are automatically rejected.

For more information about handling events, see Handling and Raising Events.

Applies to

See also