asp.net 下ajax 调用webservice

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自己在本机上新建了一个webservice

代码:

using System;using System.Web;using System.Web.Services;using System.Web.Services.Protocols;using System.Data;using System.Data.SqlClient;[WebService(Namespace = "http://tempuri.org/")][WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]public class Service : System.Web.Services.WebService{ public Service () { //如果使用设计的组件，请取消注释以下行 //InitializeComponent(); } [WebMethod] public DataSet GetProducts(decimal price) { SqlConnection con = new SqlConnection("server=210.42.151.89;database=Northwind;uid=sa;pwd=sa"); con.Open(); SqlCommand cmd = new SqlCommand("select ProductName,UnitPrice,ReorderLevel from Products where UnitPrice<@price",con); SqlParameter para = new SqlParameter("@price", SqlDbType.Decimal); para.Value = price; cmd.Parameters.Add(para); DataSet ds = new DataSet(); SqlDataAdapter da = new SqlDataAdapter(cmd); da.Fill(ds,"Products"); con.Close(); return ds; } }

想用xmlhttprequest对象来实现ajax调用webservice:

前台代码:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!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>无标题页</title> <mce:script type="text/javascript" language="javascript"></mce:script></head><body> <form id="form1" runat="server"> <div> Enter Max Price:<asp:TextBox runat="server" ID="txtPrice"></asp:TextBox> <button id="submit" onclick="GetProducts();">Go!</button> <div id="result"></div> </div> </form></body></html>

不知道哪里错了,搞了好几天都没有搞出来,看了一XML文件,不管在界面上输入什么数字,都没有取出数据,上面processResult()中

alert(serviceresponse);每次输出的内容都一样,不知道为什么,肉闷啊,有没有好心人告诉一下,小弟新手....

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