ListView.ColumnWidthChanging Event

Note: This event is new in the .NET Framework version 2.0.

Occurs when the width of a column is changing.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in

public event ColumnWidthChangingEventHandler ColumnWidthChanging
/** @event */
public void add_ColumnWidthChanging (ColumnWidthChangingEventHandler value)

/** @event */
public void remove_ColumnWidthChanging (ColumnWidthChangingEventHandler value)

JScript supports the use of events, but not the declaration of new ones.

This event allows you to check the new column width with the ColumnWidthChangingEventArgs.NewWidth property, and cancel the event if you choose by setting the Cancel property to true.

For more information about handling events, see Consuming Events.

The following code example demonstrates handling the ColumnWidthChanging event. It also demonstrates the ColumnWidthChangingEventArgs.NewWidth and Cancel members. To run this example, paste the code into a Windows Form. Call InitializeListView1 from the form's constructor or Load event handler.

ListView listView1 = new ListView();
private void InitializeListView1()
    // Initialize a ListView in detail view and add some columns.
    listView1.View = View.Details;
    listView1.Width = 200;

    // Associate a method with the ColumnWidthChangingEvent.
    listView1.ColumnWidthChanging += 
        new ColumnWidthChangingEventHandler(listView1_ColumnWidthChanging);
// Handle the ColumnWidthChangingEvent.
private void listView1_ColumnWidthChanging(object sender,  
    ColumnWidthChangingEventArgs e)
    // Check if the new width is too big or too small.
    if (e.NewWidth > 100 || e.NewWidth < 5)
        // Cancel the event and inform the user if the new
        // width does not meet the criteria.
        MessageBox.Show("Column width is too large or too small");
        e.Cancel = true;

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

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