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2009-05-15T09:49:59.223
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2017-05-23T12:10:11.523
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As stated by <a href="https://stackoverflow.com/questions/867514/make-listbox-items-have-a-different-value-than-item-text/867542#867542">the 1st answer</a>, the use of <code>DisplayMember</code> works whether you are using asp.net or winforms. And to comment a bit more, it also works if you are using the rather old fashion <code>Items.add</code> way of adding items to a <code>ListBox</code>. Just for fun, here is a simple demo of what you need (just create a new form and drop on it a ListBox and a Label): <pre><code>public partial class Form1 : Form { class Customer { public string FirstName { get; set; } public string LastName { get; set; } public override string ToString() { return string.Format("{0} {1}", LastName, FirstName); } } public Form1() { InitializeComponent(); } protected override void OnLoad(EventArgs e) { base.OnLoad(e); listBox1.DisplayMember = "LastName"; listBox1.DataSource = GetCustomers(); //listBox1.Items.AddRange(GetCustomers().ToArray()); } private IEnumerable<Customer> GetCustomers() { return new List<Customer>() { new Customer() { FirstName = "Gustav", LastName = "MAHLER" }, new Customer() { FirstName = "Johann Sebastian", LastName = "BACH" } }; } private void lb_SelectedIndexChanged(object sender, EventArgs e) { label1.Text = listBox1.SelectedItem.ToString(); } } </code></pre> Enjoy PS: <a href="https://stackoverflow.com/questions/867514/make-listbox-items-have-a-different-value-than-item-text/867524#867524">@2nd post</a> <code>Tag</code> is not available to <code>ListBox</code>: because it accepts an array of <code>object</code>, not a specific item container like <code>ListView</code>... but you don't need any in your case. <code>Tag</code> is useful when you want to carry additional data along with a specific <code>TreeViewItem</code> or <code>ListViewItem</code> for example. By the way, <code>Tag</code> is defined at the <code>Control</code> level and so exists for <code>Button</code>, <code>Label</code>, and so on... but for my part I think it is rather a bad idea to store business data in it (untyped, UI coupled...) apart from the <code>ListView</code> and <code>TreeView</code> cases for which it is rather convenient.
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