soapheader.asmx

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<%@ WebService Language="C#" Class="mySoapHeaders.HeaderService" %>

using System;
using System.Web.Services;
using System.Web.Services.Protocols;
    
namespace mySoapHeaders {

     // 继承SoapHeader类的mySoapHeader类
    public class mySoapHeader : SoapHeader {
        public string Username;
        public string Password;
    }
 
    [WebService]
    public class HeaderService {

        public mySoapHeader myHeader;

        [WebMethod]
        [SoapHeader("myHeader")]
        public string SecureMethod() {

            if (myHeader == null)
              return "请输入验证信息";

            string usr = myHeader.Username;
            string pwd = myHeader.Password;

            if (AuthenticateUser(usr, pwd)) {
                 // 验证通过所要完成的操作
                 return "验证成功: " + usr + "," + pwd;  
            }
            else {
                 //验证失败要进行的操作
                 return "验证失败";
            }
        }

        private bool AuthenticateUser(string usr, string pwd) {

            //验证过程，用户可以自定义验证的操作，比如从
            //数据库中读取用户信息等
            if ((usr != null)&&(pwd != null)) {
                // 验证操作
                return true;
             }
            return false;
        }
    }
}