using System; using System.Windows.Forms; using System.Drawing; namespace TyroDeveloperDLL { public class ComboBoxCustom : ComboBox { public ComboBoxCustom() { this.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed; } protected override void OnDrawItem(DrawItemEventArgs e) { base.OnDrawItem(e); if (e.Index < 0) { return; } e.DrawBackground(); ComboBoxItem item = (ComboBoxItem)this.Items[e.Index]; Brush brush = new SolidBrush(item.ForeColor); if ((e.State & DrawItemState.Selected) == DrawItemState.Selected) { brush = Brushes.Yellow; } e.Graphics.DrawString(item.Text, this.Font, brush, e.Bounds.X, e.Bounds.Y); } object selectedValue = null; public new Object SelectedValue { get { object ret = null; if (this.SelectedIndex >= 0) { ret = ((ComboBoxItem)this.SelectedItem).Value; } return ret; } set { selectedValue = value; } } string selectedText = ""; public new String SelectedText { get { return ((ComboBoxItem)this.SelectedItem).Text; } set { selectedText = value; } } } public class ComboBoxItem { public ComboBoxItem() { } public ComboBoxItem(string pText, object pValue) { text = pText; val = pValue; } public ComboBoxItem(string pText, object pValue, Color pColor) { text = pText; val = pValue; foreColor = pColor; } string text = ""; public string Text { get { return text; } set { text = value; } } object val; public object Value { get { return val; } set { val = value; } } Color foreColor = Color.Black; public Color ForeColor { get { return foreColor; } set { foreColor = value; } } public override string ToString() { return text; } } }
To add items:
comboBoxCustom1.Items.Add(new ComboBoxItem("México", "0", Color.Green)); comboBoxCustom1.Items.Add(new ComboBoxItem("USA", "1", Color.Blue)); comboBoxCustom1.Items.Add(new ComboBoxItem("China", "2", Color.Red));
To get the item values:
string Msg = String.Format("Text: {0}\nValue: {1}", comboBoxCustom1.SelectedText, comboBoxCustom1.SelectedValue); MessageBox.Show(Msg);
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