OldIndex Property
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ListChangedEventArgs.OldIndex Property

 

Gets the old index of an item that has been moved.

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

public int OldIndex { get; }

Property Value

Type: System.Int32

The old index of the moved item.

The following code example demonstrates the use of this member. 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 MessageBox.Show with 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 void BindingSource1_ListChanged(Object sender, ListChangedEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "ListChangedType", e.ListChangedType );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "NewIndex", e.NewIndex );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "OldIndex", e.OldIndex );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "PropertyDescriptor", e.PropertyDescriptor );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "ListChanged Event" );
}

.NET Framework
Available since 1.1
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