public partial class ACComboBox : System.Windows.Forms.ComboBox
{
private bool autoComplete;
[DefaultValue(true), Description("Auto-completes text if a match is found in the items collection."), Category("Behavior")] public bool AutoComplete { get { return autoComplete; } set { autoComplete = value; } }
public ACComboBox() { // This call is required by the Windows.Forms Form Designer. InitializeComponent(); // Add any initialization after the InitComponent call this.autoComplete = true; this.KeyPress += new KeyPressEventHandler(this.OnKeyPress); }
public ACComboBox(IContainer container) { container.Add(this);
InitializeComponent(); this.autoComplete = true; this.KeyPress += new KeyPressEventHandler(this.OnKeyPress); }
private void OnKeyPress(object sender, KeyPressEventArgs e) { if (autoComplete) { ACComboBox acComboBox = (ACComboBox)sender; if (!e.KeyChar.Equals((char)8)) { SearchItems(acComboBox, ref e); } else e.Handled = false; } else e.Handled = false; }
/// <summary> /// Searches the combo box item list for a match and selects it. /// If no match is found, then selected index defaults to -1. /// </summary> ///<param name=""acComboBox"" /> ///<param name=""e"" /> private void SearchItems(ACComboBox acComboBox, ref KeyPressEventArgs e) { int selectionStart = acComboBox.SelectionStart; int selectionLength = acComboBox.SelectionLength; int selectionEnd = selectionStart + selectionLength; int index; StringBuilder sb = new StringBuilder();
sb.Append(acComboBox.Text.Substring(0, selectionStart)) .Append(e.KeyChar.ToString()) .Append(acComboBox.Text.Substring(selectionEnd)); index = acComboBox.FindString(sb.ToString());
if (index == -1) e.Handled = false; else { acComboBox.SelectedIndex = index; acComboBox.Select(selectionStart + 1, acComboBox.Text.Length - (selectionStart + 1)); e.Handled = true; } }
}
