extends ComboBox
/*
Revised from cdoe
Visual C# 2005 Recipes A Problem-Solution Approach
# By Allen Jones
Matthew MacDonald
Rakesh Rajan
# ISBN: 1590595890
# ISBN-13: 9781590595893
# 592 pp.
# Published: Jan 2006
*/
using System;
using System.IO;
using System.Drawing;
using System.Windows.Forms;
public partial class ComboBoxHolder : Form
{
public ComboBoxHolder()
{
this.SuspendLayout();
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(292, 266);
this.Name = "ComboBoxHolder";
this.Text = "ComboBoxHolder";
this.ResumeLayout(false);
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
AutoCompleteComboBox combo = new AutoCompleteComboBox();
combo.Location = new Point(10, 10);
this.Controls.Add(combo);
combo.Items.Add("word");
combo.Items.Add("world");
combo.Items.Add("wording");
combo.Items.Add("worse");
}
[STAThread]
public static void Main(string[] args)
{
Application.Run(new ComboBoxHolder());
}
}
public class AutoCompleteComboBox : ComboBox
{
private bool controlKey = false;
protected override void OnKeyPress(System.Windows.Forms.KeyPressEventArgs e)
{
base.OnKeyPress(e);
if (e.KeyChar == (int)Keys.Escape)
{
this.SelectedIndex = -1;
this.Text = "";
controlKey = true;
} else if (Char.IsControl(e.KeyChar)) {
controlKey = true;
} else {
controlKey = false;
}
}
protected override void OnTextChanged(System.EventArgs e)
{
base.OnTextChanged(e);
if (this.Text != "" && !controlKey)
{
string matchText = this.Text;
int match = this.FindString(matchText);
if (match != -1)
{
this.SelectedIndex = match;
this.SelectionStart = matchText.Length;
this.SelectionLength = this.Text.Length - this.SelectionStart;
}
}
}
}