Flex读写数据

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" 
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
               creationComplete="init()">
    <fx:Script>
        <![CDATA[
            import flash.net.URLRequest;
            import flash.net.URLLoader;
            import flash.events.Event;
            import flash.text.engine.EastAsianJustifier;
            import flash.events.MouseEvent;
            import flash.net.URLVariables;
            
        
            private function init():void
            {
                login_btn.addEventListener(MouseEvent.CLICK,loginHandler);
            }
            
            function loginHandler(e:MouseEvent):void
            {
                
                // variables用来收集flash端的数据，其中variables点后面可以是任何的字符串。
                
                //服务器端使用Request接受数据时跟的是 ariables点后面的字符串。
                var variables:URLVariables = new URLVariables();
                variables.names = username_txt.text;
                            
                //服务器地址http://10.1.1.70:8002/Default.aspx
                var url:String = "http://10.1.1.70:8002/responseFlex.ashx";
                var request:URLRequest = new URLRequest(encodeURI(url));
                request.data = variables;
                //mess.text=variables+"---"+encodeURI(url);
                request.method=URLRequestMethod.POST;
                
                var loader:URLLoader = new URLLoader();
                loader.load(request);
                loader.addEventListener(Event.COMPLETE,completeHandler);
                
            }
            function completeHandler(e:Event)         
            {
                detial_txt.text = e.target.data;
            }
            

        ]]>
    </fx:Script>
    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
    </fx:Declarations>
    <mx:TextArea x="10" y="10" height="30" width="50" id="username_txt"/>
    <mx:TextArea x="70" y="10" height="30" width="500" id="mess"/>
    <mx:Button id="login_btn"  x="10" y="50" label="search" />
    <mx:TextArea x="10" y="100" height="100" width="500" id="detial_txt"/>
</s:Application>

http://10.1.1.70:8002是我自己部署的网站地址，c#代码如下：

using System.Web;
using System.Web.Services;
using System.Data.SqlClient;

namespace FlexReadSql
{
    /// <summary>
    /// $codebehindclassname$ 的摘要说明
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    public class ResponseFlex : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";

            if (context.Request["names"] != null)
            {
                using (SqlConnection conn = new SqlConnection())
                {
                    conn.ConnectionString = "Data Source=ZGY-WUHAN;Initial Catalog=assql-test;Persist Security Info=True;User ID=sa;Password=********";
                    conn.Open();
                    SqlCommand com = new SqlCommand();

                    com.Connection = conn;
                    com.CommandText = "select * from use_db where names=@name";
                    SqlParameter para = new SqlParameter("@name", context.Request["names"]);
                    com.Parameters.Add(para);
                    using (SqlDataReader dr = com.ExecuteReader())
                    {
                        if (dr.Read())
                        {
                            //context.Response.ContentType = "text/plain";
                            context.Response.Write(dr["pass"].ToString());
                            context.Response.End();
                        }
                        else context.Response.Write("error!!!");
                    }

                }
            }
            else context.Response.Write("没有参数！");
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}