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copied!<p>Good solution from Ian. I took that and made it into a reusable class, making sure to dispose of the timer properly. I also reduced the interval to get a more responsive app. This control also doublebuffers to reduce flicker.</p> <pre><code> public class DoublebufferedListView : System.Windows.Forms.ListView { private Timer m_changeDelayTimer = null; public DoublebufferedListView() : base() { // Set common properties for our listviews if (!SystemInformation.TerminalServerSession) { DoubleBuffered = true; SetStyle(ControlStyles.ResizeRedraw, true); } } /// <summary> /// Make sure to properly dispose of the timer /// </summary> /// <param name="disposing"></param> protected override void Dispose(bool disposing) { if (disposing && m_changeDelayTimer != null) { m_changeDelayTimer.Tick -= ChangeDelayTimerTick; m_changeDelayTimer.Dispose(); } base.Dispose(disposing); } /// <summary> /// Hack to avoid lots of unnecessary change events by marshaling with a timer: /// http://stackoverflow.com/questions/86793/how-to-avoid-thousands-of-needless-listview-selectedindexchanged-events /// </summary> /// <param name="e"></param> protected override void OnSelectedIndexChanged(EventArgs e) { if (m_changeDelayTimer == null) { m_changeDelayTimer = new Timer(); m_changeDelayTimer.Tick += ChangeDelayTimerTick; m_changeDelayTimer.Interval = 40; } // When a new SelectedIndexChanged event arrives, disable, then enable the // timer, effectively resetting it, so that after the last one in a batch // arrives, there is at least 40 ms before we react, plenty of time // to wait any other selection events in the same batch. m_changeDelayTimer.Enabled = false; m_changeDelayTimer.Enabled = true; } private void ChangeDelayTimerTick(object sender, EventArgs e) { m_changeDelayTimer.Enabled = false; base.OnSelectedIndexChanged(new EventArgs()); } } </code></pre> <p>Do let me know if this can be improved.</p>

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