使用拼音首字母检索的Combox控件

今天单位提出一个新的需求，需要使用拼音首字母检索Combox中的文字。

用了大概1小时时间准做出的这个控件和大家分享一下。

using System;using System.Collections.Generic;using System.Text;using System.Windows.Forms;using System.Collections;namespace TSMCIS.Modules.ZYGL001.ICTCustomControl{/// <summary>/// 可以根据拼音首字母进行检索其中文字的Combox///Roy`Lee2009-06-24/// </summary>/// <remarks>/// /// </remarks>public class ucl_Combox : ComboBox{private ArrayList m_list = new ArrayList(); protected override void OnEnter(EventArgs e) { m_list.Clear(); m_list.AddRange(this.Items); base.OnEnter(e); } protected override void OnLeave(EventArgs e) { this.Items.Clear(); this.Items.AddRange(m_list.ToArray()); base.OnLeave(e); } protected override void OnTextUpdate(EventArgs e) { while (this.Items.Count > 0) { this.Items.RemoveAt(0); } foreach (object o in this.m_list) { if ( GetChineseSpell(o.ToString()).ToLower().Contains(this.Text.ToLower())) { this.Items.Add(o); } } this.DroppedDown = true; this.Cursor = Cursors.Default; base.OnTextUpdate(e); } static public string GetChineseSpell(string strText) { int len = strText.Length; string myStr = ""; for (int i = 0; i < len; i++) { myStr += getSpell(strText.Substring(i, 1)); } return myStr; } static public string getSpell(string cnChar) { byte[] arrCN = Encoding.Default.GetBytes(cnChar); if (arrCN.Length > 1) { int area = (short)arrCN[0]; int pos = (short)arrCN[1]; int code = (area << 8) + pos; int[] areacode = { 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 }; for (int i = 0; i < 26; i++) { int max = 55290; if (i != 25) max = areacode[i + 1]; if (areacode[i] <= code && code < max) { return Encoding.Default.GetString(new byte[] { (byte)(65 + i) }); } } return "*"; } else return cnChar; }}}