本文将演示如何在Web服务中使用SoapHeader，同时介绍在VS2010 IDE中不同的两种引用方式。
1)创建空的ASP.NET网站SoapHeaderTest
2)创建类MyCustomSoapHeader继承自SoapHeader，代码如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services.Protocols;
/// <summary>
/// My Custom SoapHeader
/// </summary>
publicclassMyCustomSoapHeader:SoapHeader
{
/// <summary>
/// user name for validation
/// </summary>
publicstring UserName;
/// <summary>
/// user password for validation
/// </summary>
publicstring UserPwd;
}
3)新建Web服务MyWebService.asmx；为服务添加自定义字段CutomHeader，并且添加WebMethod Test，设置SoapHeader，最终代码如下:
using System.Web.Services;
using System.Web.Services.Protocols;
/// <summary>
/// Summary description forMyWebService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// Toallow this Web Service to be called from script, using ASP.NET AJAX, uncommentthe following line.
//[System.Web.Script.Services.ScriptService]
publicclassMyWebService : System.Web.Services.WebService {
publicMyWebService () {
//Uncommentthe following line if using designed components
//InitializeComponent();
}
/// <summary>
/// input custom header
/// </summary>
public MyCustomSoapHeader header;
/// <summary>
/// Test method that return user name and password.
/// </summary>
/// <returns></returns>
[WebMethod]
[SoapHeader("header",Direction=SoapHeaderDirection.In)]
publicstring Test()
{
if(header == null) return "Header is null";
else return string.Format("Username is {0} and password is {1}.",header.UserName,header.UserPwd);
}
}
4)新建一个网页Default.aspx
包含一个TextBox和Button控件，当点击Button后，引用Web服务的方法，并将返回值显示在TextBox中，Web页面标记如下:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>SoapHeader Test</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBoxReturnString" runat="server" Height="80px"
TextMode="MultiLine" Width="600px"></asp:TextBox>
<br />
<asp:Button ID="ButtonTest" runat="server" Text="Invoke Web Method"
onclick="ButtonTest_Click" />
</div>
</form>
</body>
</html>
5)添加对Web Service的引用:
(点击Discover按钮即可查找到本解决方案的Web服务)
修改ButtonTest_Click方法为:
protected void ButtonTest_Click(object sender, EventArgs e)
{
MyWebServiceSoapClient client = new MyWebServiceSoapClient();
MyServiceReference.MyCustomSoapHeader header = new MyServiceReference.MyCustomSoapHeader();
header.UserName = "Raymond";
header.UserPwd = "123";
this.TextBoxReturnString.Text = client.Test(header);
}
运行结果:
6)亦可以添加Web服务而非Service Reference:
对于高版本的VSIDE，比如2010，添加Web服务按照如下方式:
相应的方法ButtonTest_Click修改为:
protectedvoidButtonTest_Click(object sender, EventArgs e)
{
MyWebServiceReference.MyWebService service = newMyWebServiceReference.MyWebService();
service.MyCustomSoapHeaderValue = new MyWebServiceReference.MyCustomSoapHeader();
service.MyCustomSoapHeaderValue.UserName = "Raymond";
service.MyCustomSoapHeaderValue.UserPwd= "123";
this.TextBoxReturnString.Text= service.Test();
}
运行结果与之前一致。
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