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copied!<blockquote> <p>Trade.TradeStatus is an instance of the class TradeOrderStatus</p> </blockquote> <p>You mention it is a class; is it the <strong>same</strong> instance as one of those in the data-bound list? It needs to find an equality match. Alternatively, you can override <code>Equals</code> (and <code>GetHashCode()</code> - always keep the two in sync) to achieve the same thing.</p> <hr> <p>(edit)</p> <p>The simplest way to fix it is to bind to <code>SelectedValue</code>; with the "full" example (below), something like:</p> <pre><code>cbo.DisplayMember = cbo.ValueMember = "Name"; ... btn.Click += delegate { cbo.SelectedValue = GetCurrentStatus().Name; }; </code></pre> <p>(edit)</p> <p>Here's a C# example (sorry, my VB-fu is weak) of providing custom equality of the different statuses - note the "uncomment to fix":</p> <pre><code>using System.Windows.Forms; using System.Collections.Generic; class MyStatus { public MyStatus(string name) { Name = name; } public string Name { get; private set; } public override string ToString() {return Name; } /* uncomment to fix public override bool Equals(object obj) { MyStatus other = obj as MyStatus; return other != null && other.Name == this.Name; } public override int GetHashCode() {return Name.GetHashCode(); } */ } static class Program { static void Main() { ComboBox cbo = new ComboBox(); cbo.DataSource = GetStatuses(); Button btn = new Button(); btn.Click += delegate { cbo.SelectedItem = GetCurrentStatus(); }; btn.Text = "Set Status"; btn.Dock = DockStyle.Bottom; Application.Run(new Form { Controls = { cbo, btn } }); } static List<MyStatus> GetStatuses() { List<MyStatus> stats = new List<MyStatus>(); stats.Add(new MyStatus("Open")); stats.Add(new MyStatus("Pending")); stats.Add(new MyStatus("Closed")); return stats; } static MyStatus GetCurrentStatus() { return new MyStatus("Closed"); } } </code></pre>

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