ListView.ColumnReordered Event

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Occurs when the column header order is changed.

public:
 event System::Windows::Forms::ColumnReorderedEventHandler ^ ColumnReordered;

public event System.Windows.Forms.ColumnReorderedEventHandler? ColumnReordered;

member this.ColumnReordered : System.Windows.Forms.ColumnReorderedEventHandler 

Public Custom Event ColumnReordered As ColumnReorderedEventHandler 

Event Type

ColumnReorderedEventHandler

Examples

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the ColumnReordered 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 ListView named ListView1. Then ensure that the event handler is associated with the ColumnReordered event.

private void ListView1_ColumnReordered(Object sender, ColumnReorderedEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "OldDisplayIndex", e.OldDisplayIndex );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "NewDisplayIndex", e.NewDisplayIndex );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Header", e.Header );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Cancel", e.Cancel );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "ColumnReordered Event" );
}

Private Sub ListView1_ColumnReordered(sender as Object, e as ColumnReorderedEventArgs) _ 
     Handles ListView1.ColumnReordered

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "OldDisplayIndex", e.OldDisplayIndex)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "NewDisplayIndex", e.NewDisplayIndex)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Header", e.Header)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Cancel", e.Cancel)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"ColumnReordered Event")

End Sub

Remarks

The ColumnReordered event is a cancelable event and can be canceled by handling the event and setting the Cancel property to true. However, if the event is canceled, the NewDisplayIndex of the ColumnReorderedEventArgs will not change to the OldDisplayIndex value.

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