本文仅提供通过设置SoapHeader来控制非法用户对WebService的调用，如果是WebService建议使用WSE3.0来保护Web服务，如果使用的是Viaual Studio 2008可以使用WCF，WCF里面提供了更多的服务认证方法。以下提供一种基于SoapHeader的自定义验证方式。
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1.首先要自定义SoapHeader,须继承System.Web.Services.Protocols.SoapHeader。
- using?System;??
- using?System.Collections.Generic;??
- using?System.Web;??
- ??
- ??
- ??
- ??
- public?class?MySoapHeader?:?System.Web.Services.Protocols.SoapHeader??
- {??
- ????private?string?userName?=?string.Empty;??
- ????private?string?passWord?=?string.Empty;??
- ??
- ??????
- ??????
- ??????
- ????public?MySoapHeader()??
- ????{??
- ????}??
- ??????
- ??????
- ????public?MySoapHeader(string?userName,?string?passWord)??
- ????????this.userName?=?userName;??
- ????????this.passWord?=?passWord;??
- ????}??
- ??????
- ??????
- ??????
- ????public?string?UserName??
- ????{??
- ????????get?{?return?userName;?}??
- ????????set?{?userName?=?value;?}??
- ??????
- ????public?string?PassWord??
- ????????get?{?return?passWord;?}??
- ????????set?{?passWord?=?value;?}??
- }??
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2.添加WebService,并编写相应代码。
using?System.Web.Services;??
??
??
??
[WebService(Namespace?=?"http://tempuri.org/")]??
[WebServiceBinding(ConformsTo?=?WsiProfiles.BasicProfile1_1)]??
public?class?WebService?:?System.Web.Services.WebService??
{??
??????
????public?MySoapHeader?myHeader?=?new?MySoapHeader();??
????[System.Web.Services.Protocols.SoapHeader("myHeader")]??
????[WebMethod]??
????public?string?HelloWord()??
??????????
????????if?(myHeader.UserName.Equals("houlei")?&?myHeader.PassWord.Equals("houlei"))??
????????{??
????????????return?"调用服务成功！";??
????????}??
????????else??
????????????return?"对不起，您没有权限调用此服务！";??
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3.客户端调用，分别使用不设置SoapHeader与设置SoapHeader。
using?System.Linq;??
using?System.Text;??
namespace?App??
????class?Program??
????????static?void?Main(string[]?args)??
????????????localhost.WebService?service?=?new?localhost.WebService();??
??????????????
????????????Console.WriteLine("没有设置SoapHeader:"?+?service.HelloWord());??
????????????Console.WriteLine();??
??????????????
????????????localhost.MySoapHeader?header?=?new?localhost.MySoapHeader();??
????????????header.UserName?=?"houlei";??
????????????header.PassWord?=?"houlei";??
????????????service.MySoapHeaderValue?=?header;??
??????????????
????????????Console.WriteLine("设置SoapHeader:"?+?service.HelloWord());??
????????????Console.Read();??
????????}??
}??
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添加自定义SoapHeader可以成功调用WebService,否则不能调用WebService，从而实现对Web Service的非法调用。这种方法存在一定的弊端，就是在每一个WebService方法上都要进行一下验证，如果用户名与密码存储在数据库中，每调用一次WebService都要访问一次数据库进行用户名与密码的验证，对于频繁调用WebService来说，数据库压力很大。然而少量WebService调用这种方式还是一种不错的选择。
