本篇随笔主要是关于Flex与asp.net的WebService通讯，其中利用了SoapHeader。(如果你对SoapHeader不了解，可以参考WebService开发(一) 如何使用Soap头)。由此可见WebService在跨平台方面的优势。
ASP.NET的WebService代码
using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
[WebService(Namespace = "http://davidfan.cnblogs.com")]//名称空间应该和Flex中定义相同[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
public ValidateSoapHeader header;
[WebMethod]
[SoapHeader("header")]
public string HelloWorld()
{
if (header == null)
{
return "请提供验证信息.";
}
else
{
if (header.Name == "admin" && header.Password == "admin")
{
if (header.ExDate < DateTime.Now)
{
return "帐号过期";
}
else
{
return "验证成功";
}
}
else
{
return "用户名或密码错误";
}
}
}
}
/**//// <summary>
/// 继承自SoapHeader的自定义类
/// </summary>
public class ValidateSoapHeader : System.Web.Services.Protocols.SoapHeader
{
public ValidateSoapHeader()
{
}
public ValidateSoapHeader(string name, string password, DateTime dt)
{
this.name = name;
this.password = password;
this.exDate = dt;
}
private string name;
public string Name
{
get { return name; }
set { name = value; }
}
private string password;
public string Name
{
get { return password; }
set { password = value; }
}
private DateTime exDate;
public DateTime ExDate
{
get { return exDate; }
set { exDate = value; }
}
}
Flex的mxml、as代码
mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" fontFamily="simsun" fontSize="12">
<mx:Script>
<![CDATA[
import WebServiceUtility.Info; import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent; import mx.rpc.soap.SOAPHeader; private function SendRequest():void
{
var content:Info = new Info();
content.Name = UserName.text;
content.Password = PassWord.text;
content.ExDate = new Date(2010, 3, 10);
//关键在QName的构造函数 //第一个参数要和.Net的WebService的名称空间相同
//第二个参数要和.Net的WebService的继承自SoapHeader的自定义类名称相同 var qname:QName = new QName("http://davidfan.cnblogs.com","ValidateSoapHeader");
var header:SOAPHeader = new SOAPHeader(qname,content);
ws.clearHeaders();
ws.addHeader(header); ws.HelloWorld(); } private function OnResult(event:ResultEvent):void{
Result.text= event.result.toString();
} private function OnFault(event:FaultEvent):void{ Result.text= event.message.toString();
}]]></mx:Script>
<mx:WebService id="ws" wsdl=http://localhost:9200/WebSite2/Service.asmx?WSDL
result="OnResult(event)" fault="OnFault(event)"/><mx:TextInput id="UserName" x="98" y="94"/>
<mx:TextInput id="PassWord" x="98" y="124"/>
<mx:Label x="29" y="98" text="用户名:"/>
<mx:Label x="29" y="128" text="密 码:"/>
<mx:Button x="98" y="184" label="调用" click="SendRequest()"/>
<mx:Label x="29" y="156" text="结 果:"/>
<mx:TextInput id="Result" x="98" y="154"/></mx:Application>
as
package WebServiceUtility
{
public class Info{ //该类名称可以和.Net中的ValidateSoapHeader不同
//但字段要对应拼写相同
public var Name:String;
public var Password:String; public var ExDate:Date;
}}