MatchAttribute 類別

定義

public ref class MatchAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.All)]
public sealed class MatchAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.All)>]
type MatchAttribute = class
    inherit Attribute

Public NotInheritable Class MatchAttribute
Inherits Attribute

繼承

Object

Attribute

MatchAttribute

屬性

AttributeUsageAttribute

範例

#using <System.dll>
#using <System.Web.Services.dll>

using namespace System;
using namespace System::Web::Services::Protocols;

public ref class Example_Headers
{
public:

   [MatchAttribute("TITLE>(.*?)<")]
   String^ Title;

   [MatchAttribute("",Pattern="h1>(.*?)<",IgnoreCase=true)]
   String^ H1;

   [MatchAttribute("H2>((([^<,]*),?)+)<",Group=3,Capture=4)]
   String^ Element;

   [MatchAttribute("H2>((([^<,]*),?){2,})<",Group=3,MaxRepeats=0)]
   array<String^>^ Elements1;

   [MatchAttribute("H2>((([^<,]*),?){2,})<",Group=3,MaxRepeats=1)]
   array<String^>^ Elements2;

   [MatchAttribute("H3 ([^=]*)=([^>]*)",Group=1)]
   String^ Attribute;

   [MatchAttribute("H3 ([^=]*)=([^>]*)",Group=2)]
   String^ Value;
};

public ref class MatchAttribute_Example: public HttpGetClientProtocol
{
public:
   MatchAttribute_Example()
   {
      Url = "http://localhost";
   }

   [HttpMethodAttribute(TextReturnReader::typeid,UrlParameterWriter::typeid)]
   Example_Headers^ GetHeaders()
   {
      return ((Example_Headers^)(Invoke( "GetHeaders", ( Url + "/MyHeaders.html" ),
         gcnew array<Object^>(0) )));
   }

   System::IAsyncResult^ BeginGetHeaders( System::AsyncCallback^ callback,
      Object^ asyncState )
   {
      return BeginInvoke( "GetHeaders", ( Url + "/MyHeaders.html" ),
         gcnew array<Object^>(0), callback, asyncState );
   }

   Example_Headers^ EndGetHeaders( System::IAsyncResult^ asyncResult )
   {
      return (Example_Headers^)(EndInvoke( asyncResult ));
   }
};

using System;
using System.Web.Services.Protocols;

public class MatchAttribute_Example : HttpGetClientProtocol
{
    public MatchAttribute_Example()
    {
        Url = "http://localhost";
    }

    [HttpMethodAttribute(typeof(TextReturnReader), typeof(UrlParameterWriter))]
    public Example_Headers GetHeaders()
    {
        return ((Example_Headers)Invoke("GetHeaders", (Url + "/MyHeaders.html"),
            new object[0]));
    }

    public System.IAsyncResult BeginGetHeaders(System.AsyncCallback callback,
        object asyncState)
    {
        return BeginInvoke("GetHeaders", (Url + "/MyHeaders.html"),
            new object[0], callback, asyncState);
    }

    public Example_Headers EndGetHeaders(System.IAsyncResult asyncResult)
    {
        return (Example_Headers)(EndInvoke(asyncResult));
    }
}
public class Example_Headers
{
    [MatchAttribute("TITLE>(.*?)<")]
    public string Title;

    [MatchAttribute("", Pattern="h1>(.*?)<", IgnoreCase=true)]
    public string H1;

    [MatchAttribute("H2>((([^<,]*),?)+)<", Group=3, Capture=4)]
    public string Element;

    [MatchAttribute("H2>((([^<,]*),?){2,})<", Group=3, MaxRepeats=0)]
    public string[] Elements1;

    [MatchAttribute("H2>((([^<,]*),?){2,})<", Group=3, MaxRepeats=1)]
    public string[] Elements2;

    [MatchAttribute("H3 ([^=]*)=([^>]*)", Group=1)]
    public string Attribute;

    [MatchAttribute("H3 ([^=]*)=([^>]*)", Group=2)]
    public string Value;
}

Imports System.Web.Services.Protocols


Public Class MatchAttribute_Example
    Inherits HttpGetClientProtocol

    Public Sub New()
        Url = "http://localhost"
    End Sub

    <HttpMethodAttribute(GetType(TextReturnReader), GetType(UrlParameterWriter))> _
    Public Function GetHeaders() As Headers
        Return CType(Invoke("GetHeaders", Url + "/MyHeaders.html", New Object(0) {}), Headers)
    End Function 'GetHeaders


    Public Function BeginGetHeaders(ByVal callback As System.AsyncCallback, ByVal asyncState As Object) As _
                                                                         System.IAsyncResult
        Return BeginInvoke("GetHeaders", Url + "/MyHeaders.html", New Object(0) {}, _
                                                                          callback, asyncState)
    End Function 'BeginGetHeaders


    Public Function EndGetHeaders(ByVal asyncResult As System.IAsyncResult) As Headers
        Return CType(EndInvoke(asyncResult), Headers)
    End Function 'EndGetHeaders
End Class

Public Class Headers

    <MatchAttribute("TITLE>(.*?)<")> _
    Public Title As String

    <MatchAttribute("", Pattern:="h1>(.*?)<", IgnoreCase:=True)> _
    Public H1 As String

    <MatchAttribute("H2>((([^<,]*),?)+)<", Group:=3, Capture:=4)> _
    Public Element As String

    <MatchAttribute("H2>((([^<,]*),?){2,})<", Group:=3, MaxRepeats:=0)> _
    Public Elements1() As String

    <MatchAttribute("H2>((([^<,]*),?){2,})<", Group:=3, MaxRepeats:=1)> _
    Public Elements2() As String

    <MatchAttribute("H3 ([^=]*)=([^>]*)", Group:=1)> _
    Public Attribute As String

    <MatchAttribute("H3 ([^=]*)=([^>]*)", Group:=2)> _
    Public Value As String
End Class

備註

文字模式匹配允許 XML 網路服務利用現有 HTML 內容，透過正則表達式進行解析。 XML 網路服務透過匹配元素指定它想解析的服務描述內容。 這些匹配元素指定了幾個項目：解析現有 HTML 頁面內容的正則表達式、解析是否必須不區分大小寫，以及應回傳多少個與正則表達式相符的內容實例。 當客戶端使用 Wsdl.exe 工具建立代理類別時，代理類別的方法會詳細 MatchAttribute 說明服務描述中所找到的匹配元素。

欲了解更多文字模式匹配的資訊，請參閱 《如何建立解析網頁內容的網路服務》。