推荐一款自动建议功能的AJAX文本框

using  System;
using  System.Collections;
using  System.ComponentModel;
using  System.Data;
using  System.Text.RegularExpressions;
using  System.Drawing;
using  System.Web;
using  System.Web.SessionState;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.HtmlControls;
using  Ajax;
using  ThirdParty.Net;

namespace  axLookupDemo
{
    /**//// <summary>
    /// Summary description for _Default.
    /// </summary>
    public class axlDemo : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.Label Label1;
        protected AjaxLookup axLookup1;
        protected ThirdParty.Net.AjaxLookup axLookup2;
        protected System.Web.UI.WebControls.Label Label3;
        protected ThirdParty.Net.AjaxLookup axLookup3;
        protected System.Web.UI.WebControls.Label Label2;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            //Ajax.Utility.RegisterTypeForAjax(GetType(ReferralsDB))
            Ajax.Utility.RegisterTypeForAjax(typeof(axlDemo));
        }

        [AjaxMethod()]
        public ArrayList GetSearchItems(string query)
        {
            ArrayList matchItems = new ArrayList();
            string[] item1 = {"C1", "Item 1 - note that the box will grow to the size of the largest line"};
            string[] item2 = {"C2", "Item 2 - unless a DivWidth is specified"};
            matchItems.Add(item1);
            matchItems.Add(item2);

            return matchItems;
        }

        [AjaxMethod()]
        public ArrayList GetSearchItemsCN(string query)
        {
            query =  System.Web.HttpUtility.UrlDecode(query);
            
            //测试如果是数字，按数字匹配
            
            if ( IsValidInt( query ) )
            {
                ArrayList items = GetRecordsCNByDM();
                ArrayList matchItems = new ArrayList();

                if ( query.Length > 0 )
                {
                
                    foreach (string[] item in items)
                    {
                        if (item[0].StartsWith(query))
                        {
                            matchItems.Add(item);
                        }

                    }
                }

                return matchItems;
            }
            else //测试非数字按拼音缩写或汉字查找
            {
                if ( IsValidEnString( query) ) //拼音缩写
                {
                    ArrayList items = GetRecordsCNByPY();
                    ArrayList matchItems = new ArrayList();

                    if ( query.Length > 0 )
                    {
                
                        foreach (string[] item in items)
                        {
                            if (item[0].ToUpper().StartsWith(query.ToUpper()))
                            {
                                string[] itemOut = new string[2];
                                itemOut[0] = item[1];
                                itemOut[1] = item[2];

                                matchItems.Add(itemOut);
                            }

                        }
                    }

                    return matchItems;
                }
                else //全词查找
                {
                    ArrayList items = GetRecordsCNByDM();
                    ArrayList matchItems = new ArrayList();

                    if ( query.Length > 0 )
                    {
                
                        foreach (string[] item in items)
                        {
                            if (item[1].StartsWith(query))
                            {
                                matchItems.Add(item);
                            }

                        }
                    }

                    return matchItems;
                }
            }            
        }

        private ArrayList GetRecordsCNByDM()
        {
            ArrayList items = new ArrayList();

            string[,] item = new string[,] {
                                                {"600616", "G食品"},
                                                {"600123", "G瓜瓜"},
                                                {"600601", "G西西"},
                                                {"600602", "G西瓜"},
                                                {"600102", "G葡萄"},
                                                {"600103", "G枣子"},
                                                {"600104", "G哈密瓜"},
            };

            for ( int i = 0; i < item.GetLength(0); i ++ )
            {
                string[] itemLine = new string[item.GetLength(1)];
                
                for ( int j = 0; j < itemLine.Length; j ++ )
                {
                    itemLine[j] = item[i,j].ToString();
                }

                items.Add( itemLine );
            }

            return items;
        }

        private ArrayList GetRecordsCNByPY()
        {
            ArrayList items = new ArrayList();

            string[,] item = new string[,] {
                                                {"GSP", "600616", "G食品"},
                                                {"GGG", "600123", "G瓜瓜"},
                                                {"GXX", "600601", "G西西"},
                                                {"GXG", "600602", "G西瓜"},
                                                {"GPT", "600102", "G葡萄"},
                                                {"GZZ", "600103", "G枣子"},
                                                {"GHM", "600104", "G哈密瓜"},
            };

            for ( int i = 0; i < item.GetLength(0); i ++ )
            {
                string[] itemLine = new string[item.GetLength(1)];
                
                for ( int j = 0; j < itemLine.Length; j ++ )
                {
                    itemLine[j] = item[i,j].ToString();
                }

                items.Add( itemLine );
            }

            return items;
        }

        /**////判断英文名 
        private bool IsValidEnString( string EnString )
        {
            return Regex.IsMatch( EnString, @"^[a-zA-Z]{1,30}$" ); 
        }

        //判断整型
        private bool IsValidInt( string IntString )
        {
            return Regex.IsMatch( IntString, @"^[0-9]{1,6}$" ); 
        }

        Web Form Designer generated code#region Web Form Designer generated code
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: This call is required by the ASP.NET Web Form Designer.
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {    
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion
    }
}

<% @ Register TagPrefix="Ajax" Namespace="ThirdParty.Net" Assembly="AjaxLookup"  %>
<% @ Page language="c#" Codebehind="Default.aspx.cs" AutoEventWireup="false" Inherits="axLookupDemo.axlDemo"  %>
<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"  >
< HTML >
     < HEAD >
         < title > Default </ title >
         < meta  content ="Microsoft Visual Studio .NET 7.1"  name ="GENERATOR" >
         < meta  content ="C#"  name ="CODE_LANGUAGE" >
         < meta  content ="JavaScript"  name ="vs_defaultClientScript" >
         < meta  content ="http://schemas.microsoft.com/intellisense/ie5"  name ="vs_targetSchema" >
         < script  language ="javascript"  src ="browser_detection.js" ></ script >
         < script  language ="javascript"  src ="axlookup.js" ></ script >
     </ HEAD >
     < body  MS_POSITIONING ="GridLayout" >
         < form  id ="Form1"  method ="post"  runat ="server" >
             < asp:label  id ="Label1"  style ="Z-INDEX: 100; LEFT: 48px; POSITION: absolute; TOP: 264px"  runat ="server"
                Width ="80px"  Visible ="False" > Control #1 </ asp:label >
             < Ajax:AjaxLookup  id ="axLookup3"  style ="Z-INDEX: 106; LEFT: 40px; POSITION: absolute; TOP: 48px"  Width ="184px"
                CallBackFunction ="axlDemo.GetSearchItemsCN"  HighlightColor ="#FFF791"  DivFont ="Arial"  DivPadding ="1px"
                DivBorder ="1px solid gray"  BackgroundColor ="#EEE"  FontSize ="11px"  FontWeight ="bold"  ItemStyleBorderBottom ="0px"
                ItemStylePadding ="1px 0px 1px 0px"  ItemStyleSpacing ="10px"  Runat ="server"  DivWidth ="184px" ></ Ajax:AjaxLookup >
             < asp:label  id ="Label3"  style ="Z-INDEX: 105; LEFT: 40px; POSITION: absolute; TOP: 24px"  runat ="server"
                Width ="248px"  Font-Size ="X-Small" > 股票输入(代码、拼音缩写、全词) </ asp:label >
             < Ajax:AjaxLookup  id ="axLookup1"  style ="Z-INDEX: 102; LEFT: 48px; POSITION: absolute; TOP: 296px"
                Width ="128px"  Runat ="server"  ItemStyleSpacing ="10px"  ItemStylePadding ="1px 0px 1px 0px"  ItemStyleBorderBottom ="0px"
                FontWeight ="bold"  FontSize ="12px"  BackgroundColor ="#EEE"  DivBorder ="2px solid red"  DivPadding ="2px"
                DivFont ="Arial"  HighlightColor ="#C30"  CallBackFunction ="axlDemo.GetSearchItems"  Visible ="False"   />
             < asp:label  id ="Label2"  style ="Z-INDEX: 101; LEFT: 264px; POSITION: absolute; TOP: 264px"  runat ="server"
                Width ="96px"  Visible ="False" > Control #2 </ asp:label >
             < Ajax:AjaxLookup  id ="axLookup2"  style ="Z-INDEX: 104; LEFT: 264px; POSITION: absolute; TOP: 296px"
                Width ="128px"  CallBackFunction ="axlDemo.GetSearchItems"  HighlightColor ="gray"  DivFont ="Arial"
                DivPadding ="2px"  DivBorder ="4px solid blue"  BackgroundColor ="#EEE"  FontSize ="12px"  FontWeight ="bold"
                DivWidth ="200px"  ItemStyleBorderBottom ="0px"  ItemStylePadding ="1px 0px 1px 0px"  ItemStyleSpacing ="10px"
                Runat ="Server"  Visible ="False"   />
         </ form >
     </ body >
</ HTML >