<asp:TextBox ID="txtTempScenic" runat="server"></asp:TextBox> <ajax:AutoCompleteExtender ID="txtTempScenic_AutoCompleteExtender" runat="server" BehaviorID="AutoCompleteEx" DelimiterCharacters="" Enabled="True" ServicePath="~/WebService/AutoComplete.asmx" ServiceMethod="GetScenic" TargetControlID="txtTempScenic" CompletionInterval="500" CompletionSetCount="20" EnableCaching="true" MinimumPrefixLength="1"></ajax:AutoCompleteExtender>

<%@ WebService Language="C#" CodeBehind="~/App_Code/AutoComplete.cs" Class="AutoComplete" %>

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Services; using System.Data; /// <summary> ///add by ahuinan /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] //若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。 [System.Web.Script.Services.ScriptService] public class AutoComplete : System.Web.Services.WebService { public AutoComplete() { //如果使用设计的组件，请取消注释以下行 //InitializeComponent(); } [WebMethod] public string HelloWorld() { return "Hello World"; } //获得景区 [WebMethod] public string[] GetScenic(string prefixText,int count) { ET_ERP.BLL.ERP_ScenicArea b_ScenicArea = new ET_ERP.BLL.ERP_ScenicArea(); string strWhere = " SA_Name like '" + prefixText + "%' AND SA_IsDel = 0"; DataSet ds = b_ScenicArea.Select(" top "+count+" SA_Name", strWhere); count = ds.Tables[0].Rows.Count; string[] array = new string[count]; for (int i = 0; i < count; i++) { array[i] = ds.Tables[0].Rows[i]["SA_Name"].ToString(); } return array; } }