ajaxcontroltoolkit:AutoCompleteExtender用法

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完整代码如下，请看：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="combobox测试.WebForm1" %><%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">    <title></title></head><body>    <form id="form1" runat="server">    <div>        <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">        </asp:ToolkitScriptManager>        <asp:TextBox ID="TextBox1" runat="server" Width="300px"></asp:TextBox>        <asp:AutoCompleteExtender ID="TextBox1_AutoCompleteExtender" runat="server" ServicePath="AutoComplete.asmx"            ServiceMethod="GetPort" TargetControlID="TextBox1" MinimumPrefixLength="1"  CompletionSetCount="10"></asp:AutoCompleteExtender>    </div>    </form></body></html>

其中的 AutoComplete.asmx是：

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Services;using System.Data;using System.Data.SqlClient;namespace combobox测试{    /// <summary>    /// AutoComplete 的摘要说明    /// </summary>    [WebService(Namespace = "http://tempuri.org/")]    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]    [System.ComponentModel.ToolboxItem(false)]    [System.Web.Script.Services.ScriptService]    public class AutoComplete : System.Web.Services.WebService    {        [WebMethod]        public string HelloWorld()        {            return "Hello World";        }        [WebMethod]        public string[] GetData(string prefixText, int count)        {            string[] data = new string[4] { "中国", "中国台湾", "中国香港", "美国" };            return data.Where(p => p.IndexOf(prefixText) >= 0).Take(count).ToArray();        }        [WebMethod]        public string[] GetPort(string prefixText, int count)        {            string connection = "*****";            SqlConnection cn;            DataSet ds = new DataSet();            using (cn = new SqlConnection(connection))            {                cn.Open();                string sql = "******";                SqlDataAdapter adapter = new SqlDataAdapter(sql, cn);                adapter.Fill(ds);                cn.Close();            }            int lenght = ds.Tables[0].Rows.Count;            string[] data = new string[lenght];            for (int i = 0; i < lenght; i++)            {                string temp = ds.Tables[0].Rows[i]["PortName"].ToString() + "  " +                    ds.Tables[0].Rows[i]["PortCode"].ToString() + "  " +                    ds.Tables[0].Rows[i]["NationName"].ToString() + "  " +                    ds.Tables[0].Rows[i]["NationCode"].ToString() + "  ";                data[i] = temp;            }            return data;        }    }//end class}

要提醒的是：

ServiceMethod一定要是：返回值为string [] 参数一定是 string prefixText 和 int count