ListChangedEventArgs Class
Assembly: System (in system.dll)
A ListChanged event is raised when the data in an IBindingList changes.
The NewIndex property indicates the index of the item that was added, changed, or deleted. If an item was moved, the NewIndex property indicates the new location of the item and the OldIndex property indicates the old location.
If only one item is affected by a change, the OldIndex property value is -1.
The following code example demonstrates the use of this type. In the example, an event handler reports on the occurrence of the BindingSource.ListChanged event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing System.Windows.Forms.MessageBox.Show with System.Console.WriteLine or appending the message to a multiline TextBox.
To run the example code, paste it into a project that contains an instance of type BindingSource named BindingSource1. Then ensure that the event handler is associated with the BindingSource.ListChanged event.
Private Sub BindingSource1_ListChanged(sender as Object, e as ListChangedEventArgs) _ Handles BindingSource1.ListChanged Dim messageBoxVB as New System.Text.StringBuilder() messageBoxVB.AppendFormat("{0} = {1}", "ListChangedType", e.ListChangedType) messageBoxVB.AppendLine() messageBoxVB.AppendFormat("{0} = {1}", "NewIndex", e.NewIndex) messageBoxVB.AppendLine() messageBoxVB.AppendFormat("{0} = {1}", "OldIndex", e.OldIndex) messageBoxVB.AppendLine() messageBoxVB.AppendFormat("{0} = {1}", "PropertyDescriptor", e.PropertyDescriptor) messageBoxVB.AppendLine() MessageBox.Show(messageBoxVB.ToString(),"ListChanged Event") End Sub
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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.