Flex与WebServices进行数据交互实例

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Services;
using System.Data;

using System.IO;
using System.Xml;

namespace WebServicesDemo
{
    /**//// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    public class DemoDataForFlex : System.Web.Services.WebService
    {
        //第一种,简单测试
        [WebMethod]
        public string SimpleTest()
        {
            return "dy first Test!";
        }    


        //带参数的Web方法
        [WebMethod]
        public string HaveParamMethod(string inputVal)
        {
            return "dy"   inputVal;
        }

        //返回XML字符串数据
        [WebMethod]
        public string ReutrnStringXmlData()
        {
            DataTable dt = new DataTable();

            dt.Columns.Add(new DataColumn("Name"));
            dt.Columns.Add(new DataColumn("Sex"));
            dt.Columns.Add(new DataColumn("Age"));
            dt.Columns.Add(new DataColumn("Address"));
           
            for (int i = 0; i < 10; i  )
            {
                dt.Rows.Add(new object[] { "LJ"   i.ToString(), i % 2 == 0 ? "女" : "男", i * 10, "深圳" });             
            }//添加十行数据

            DataSet ds = new DataSet();
            ds.Tables.Add(dt);
            return ds.GetXml();
          
        }

        //返回XmlDocument数据
        [WebMethod]
        public XmlDocument ReturnXmlDocumentData()
        {
            DataTable dt = new DataTable();

            dt.Columns.Add(new DataColumn("Name"));
            dt.Columns.Add(new DataColumn("Sex"));
            dt.Columns.Add(new DataColumn("Age"));
            dt.Columns.Add(new DataColumn("Address"));

            for (int i = 0; i < 10; i  )
            {
                dt.Rows.Add(new object[] { "DY"   i.ToString(), i % 2 == 0 ? "女" : "男", i * 10, "深圳" });
            }//添加十行数据

            DataSet ds = new DataSet();
            ds.Tables.Add(dt);
           // ds.GetXml();
            XmlDocument xml = new XmlDocument();
            xml.LoadXml(ds.GetXml());
            return xml;
        }     
    }
}

Build成功后,在IE中输入:http://192.168.2.8/DemoDataForFlex.asmx测试你的WebServics是否已通.
如果WebServices访问可以通过,Flex就可以访用了.