-- 作者：myname2
-- 发布时间：10/30/2004 12:07:00 PM
-- [求助]看用wsdl.exe把wsdl文件生成客户端代理类的一个例子所遇到的很多疑问
学习创建XML Web services时看到这个例子,这个服务是分析matchserver.html页的内容并返回数据.
他先是建立了一个服务说明文档.wsdl文件,然后用wsdl.exe生成了代理类,然后有个窗体页.aspx,可以通过点击该页上的一个button就可以看到返回的数据. 我看了用wsdl.exe自动生成的.vb文件,如下: **********************
Option Strict Off
Option Explicit On Imports System
Imports System.ComponentModel
Imports System.Diagnostics
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.Xml.Serialization '
'此源代码由 wsdl, Version=1.1.4322.573 自动生成。
' '<remarks/>
<System.Diagnostics.DebuggerStepThroughAttribute(), _
System.ComponentModel.DesignerCategoryAttribute("code")> _
Public Class TestIt
Inherits System.Web.Services.Protocols.HttpGetClientProtocol
'<remarks/>
Public Sub New()
MyBase.New
Me.Url = "http://localhost"
End Sub
'<remarks/>
<System.Web.Services.Protocols.HttpMethodAttribute(GetType(System.Web.Services.Protocols.TextReturnReader), GetType(System.Web.Services.Protocols.UrlParameterWriter))> _
Public Function TestHeaders() As TestHeadersMatches
Return CType(Me.Invoke("TestHeaders", (Me.Url + "/QuickStart1/MatchServer.html"), New Object(-1) {}),TestHeadersMatches)
End Function
'<remarks/>
Public Function BeginTestHeaders(ByVal callback As System.AsyncCallback, ByVal asyncState As Object) As System.IAsyncResult
Return Me.BeginInvoke("TestHeaders", (Me.Url + "/QuickStart1/MatchServer.html"), New Object(-1) {}, callback, asyncState)
End Function
'<remarks/>
Public Function EndTestHeaders(ByVal asyncResult As System.IAsyncResult) As TestHeadersMatches
Return CType(Me.EndInvoke(asyncResult),TestHeadersMatches)
End Function
End Class Public Class TestHeadersMatches
<System.Web.Services.Protocols.MatchAttribute("TITLE>(.*?)<")> _
Public Title As String
<System.Web.Services.Protocols.MatchAttribute("H1>(.*?)<")> _
Public H1 As String
End Class
**********************
我对其中的testheadersmatches这个类怎么来的不是很理解.
象类 TestIt 我知道是在.wsdl文件里的service name="TestIt"有定义,而TestHeaders方法在.wsdl文件里的operation name="TestHeaders" 有定义.那testheadersmatches是在wsdl文件里的什么地方定义的呢? .wsdl文件如下:
************************
<?xml version="1.0"?>
<definitions xmlns:s="http://www.w3.org/1999/XMLSchema" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" targetNamespace="http://tempuri.org/" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:s0="http://tempuri.org/">
<message name="TestHeadersHttpGetIn"/>
<message name="TestHeadersHttpGetOut">
<part name="Body" type="s:string"/>
</message>
<portType name="TestItHttpGet">
<operation name="TestHeaders">
<input message="s0:TestHeadersHttpGetIn"/>
<output message="s0:TestHeadersHttpGetOut"/>
</operation>
</portType>
<binding name="TestItHttpGet" type="s0:TestItHttpGet">
<http:binding verb="GET"/>
<operation name="TestHeaders">
<http:operation location="/QuickStart1/MatchServer.html"/>
<input>
<http:urlEncoded/>
</input>
<output>
<text xmlns="http://microsoft.com/wsdl/mime/textMatching/">
<match name='Title' pattern='TITLE>(.*?)<'/>
<match name='H1' pattern='H1>(.*?)<'/>
</text>
</output>
</operation>
</binding>
<service name="TestIt">
<port name="TestItHttpGet" binding="s0:TestItHttpGet">
<http:address location="http://localhost" />
</port>
</service>
</definitions>
**************************
其实我还是对wsdl文件里<binding>部分的一些元素不太理解.比如说上面这个文件定义了两个消息,其中的TestHeadersHttpGetIn没有part部分,把它作为请求消息发送给服务时,服务到底收到了什么内容;而TestHeadersHttpGetOut有part部分,类型为string,把它作为响应消息,那它从服务返回时带回的内容是什么?我又是通过什么方法接收的呢？ 另外在<input>块里的<http:urlEncoded/>它到底把什么进行编码了?
而<output>块里的
<text xmlns="http://microsoft.com/wsdl/mime/textMatching/">
<match name='Title' pattern='TITLE>(.*?)<'/>
<match name='H1' pattern='H1>(.*?)<'/>
</text>
text、match这些元素又其什么作用呢，他们是什么类型的呢？ 还有命名空间是不是都有一个架构文件呢？象上面这个xmlns="http://microsoft.com/wsdl/mime/textMatching/"，怎么看不到呢？
aspx文件如下：
********************
<html> <script language="VB" runat="server"> Sub GetQuote(Src As Object, E As EventArgs)
Try
Dim matcher As New TestIt()
Dim matches As TestHeadersMatches
matches = matcher.TestHeaders()
Title.InnerHtml = matches.Title
H1.InnerHtml = matches.H1
StockDetails.Visible = true
Catch Exc As Exception
Message.InnerHtml = "A network error occured or the service was unable to locate the symbol, please try again."
End Try
End Sub </script> <body bgcolor="ffffee" style="font: 10pt verdana"> <h4>Using Html Text Pattern Matching Sample</h4> <form runat="server">
<table style="font: 10pt verdana" width="300">
<tr>
<td></td>
<td><input type="submit" OnServerClick="GetQuote" runat="server"/></td>
</tr>
</table>
<p>
<hr>
<p>
<table id="StockDetails" visible="false" runat="server" style="font: 8pt verdana" border=1>
<tr>
<td><b>Company Name</b></td>
<td><span id="Title" runat="server"/></td>
</tr>
<tr>
<td><b>H1 Text</b></td>
<td><span id="H1" runat="server"/></td>
</tr>
</table>
<p>
<span id="Message" EnableViewState="false" runat="server"/>
<p>
</form> </body>
</html>
******************************** matchservice.html文件如下：
********************************
<HTML>
<HEAD>
<TITLE>Hello!</TITLE>
</HEAD> <BODY>
<H1>Hi Again!</H1>
</BODY>
</HTML>
*********************************
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