在websevrice 中,soap header是十分重要的哦，主要是安全性的考虑，在asp.net 2.0中,可以简单地应用soap header来
进行傻瓜式的应用，更复杂的应用当然要更深入地去看了,
首先，我们写个简单的helloworld的webservice
using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
public ValidationSoapHeader Authentication;
private const string DEV_TOKEN = "12345";
public Service()
{
//Uncomment the following line if using designed components
//InitializeComponent();
}
[SoapHeader("Authentication")]
[WebMethod]
public string HelloWorld()
{
if (Authentication != null && Authentication.DevToken == DEV_TOKEN)
{
return "Hello World";
}
else
{
throw new Exception("Authentication Failed");
}
}
}
可以看到，首先必须在[webmethod]前添加[SoapHeader("Authentication")]，这里我们判断来自客户端的soap header是否有效，并且看其tokern是否等于我们预先定义好的token,如果是的话就输出hello world,否则抛出异常
这里我们编写一个ValidationSoapHeader类，其中是继承了soap header,如下
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Web.Services.Protocols;
/// <summary>
/// Summary description for ePhoneCredentials
/// </summary>
public class ValidationSoapHeader : SoapHeader
{
private string _devToken;
public ValidationSoapHeader()
{
}
public ValidationSoapHeader(string devToken)
{
this._devToken = devToken;
}
public string DevToken
{
get { return this._devToken; }
set { this._devToken = value; }
}
}
这里只不过是一些属性的设置读取，然后编写一个客户端，如下，显式指定要传递soap header
//ConsoleMyCsharpClient是建立客户端的工程名
localhost.ValidationSoapHeader header = new ConsoleMyCsharpClient.localhost.ValidationSoapHeader();
header.DevToken = "12345";
localhost.Service ws = new ConsoleMyCsharpClient.localhost.Service();
ws.ValidationSoapHeaderValue = header;
Console.WriteLine(ws.HelloWorld());
Console.ReadLine();
这样，当客户端传递12345给WS后，能正确显示HELLO WORLD，否则不能正确显示
