提取网页中的所有链接、点击第 n 个链接 - 回复 "刘丽" 的问题

问题来源: http://www.cnblogs.com/del/archive/2009/01/08/1370907.html#1425544

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本例效果图:

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代码文件:

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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, OleCtrls, SHDocVw;

type
  TForm1 = class(TForm)
    WebBrowser1: TWebBrowser;
    ListBox1: TListBox;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{控件初始化}
procedure TForm1.FormCreate(Sender: TObject);
begin
  WebBrowser1.Align := alTop;
  WebBrowser1.Navigate('http://del.cnblogs.com');
  ListBox1.Align := alClient;

  Button1.Caption := '提取网页所有链接地址';
  Button2.Caption := '提取网页所有链接文本';
  Button3.Caption := '模拟点击指定的链接';
end;

{提取网页所有链接地址}
procedure TForm1.Button1Click(Sender: TObject);
var
  i: Integer;
begin
  ListBox1.Clear;
  for i := 0 to WebBrowser1.OleObject.document.anchors.Length - 1 do
    ListBox1.Items.Add(WebBrowser1.OleObject.document.anchors.item(i).href);
end;

{提取网页所有链接文本}
procedure TForm1.Button2Click(Sender: TObject);
var
  i: Integer;
begin
  ListBox1.Clear;
  for i := 0 to WebBrowser1.OleObject.document.anchors.Length - 1 do
    ListBox1.Items.Add(WebBrowser1.OleObject.document.anchors.item(i).innerText);
end;

{模拟点击指定的链接}
procedure TForm1.Button3Click(Sender: TObject);
begin
//  WebBrowser1.OleObject.document.anchors.item(0).click; {假如是第一个链接}
  if ListBox1.ItemIndex <> -1 then
    WebBrowser1.OleObject.document.anchors.item(ListBox1.ItemIndex).click;

  ListBox1.Clear;
end;

end.

窗体文件:

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object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 229
  ClientWidth = 626
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  OnCreate = FormCreate
  PixelsPerInch = 96
  TextHeight = 13
  object ListBox1: TListBox
    Left = 8
    Top = 127
    Width = 185
    Height = 130
    ItemHeight = 13
    TabOrder = 4
  end
  object WebBrowser1: TWebBrowser
    Left = 8
    Top = 8
    Width = 300
    Height = 113
    TabOrder = 0
    ControlData = {
      4C000000021F0000AE0B00000000000000000000000000000000000000000000
      000000004C000000000000000000000001000000E0D057007335CF11AE690800
      2B2E126208000000000000004C0000000114020000000000C000000000000046
      8000000000000000000000000000000000000000000000000000000000000000
      00000000000000000100000000000000000000000000000000000000}
  end
  object Button1: TButton
    Left = 451
    Top = 127
    Width = 151
    Height = 25
    Caption = 'Button1'
    TabOrder = 1
    OnClick = Button1Click
  end
  object Button2: TButton
    Left = 451
    Top = 158
    Width = 151
    Height = 25
    Caption = 'Button2'
    TabOrder = 2
    OnClick = Button2Click
  end
  object Button3: TButton
    Left = 451
    Top = 189
    Width = 151
    Height = 25
    Caption = 'Button3'
    TabOrder = 3
    OnClick = Button3Click
  end
end