Matches正則使用提取內容

用VS新建WinForm程式，窗體上是三個文本框和一個按鈕。
可以自己構造正則表達式，自己修改匹配內容

正則表達是要提取的部分為hewenqitext

代碼如下：

  1 using System;
  2 using System.Text.RegularExpressions;
  3 using System.Windows.Forms;
  4 
  5 namespace HoverTreeBatch.HoverTree
  6 {
  7 public partial class RegexForm : Form
  8 {
  9 public RegexForm()
 10 {
 11 InitializeComponent();
 12 textBox_regex.Text = @"<img\b[^<>]*?\bsrc[\s\t\r\n]*=[\s\t\r\n]*[""']?[\s\t\r\n]*(?<hewenqitext>[^\s\t\r\n""'<>]*)[^<>]*?/?[\s\t\r\n]*>";
 13 textBox_content.Text = @"<div class=""dengxaing-hovertree-com""><a title=""何問起批量2"" href=""http://hovertree.com/hvtimg/201601/p3t2ldyr.png""><img src=""http://hovertree.com/hvtimg/201601/p3t2ldyr_l.png"" style=""width:180px;height:140px;"" /></a><a title=""VS2015開發人員命令提示查看PublicKeyToken(公鑰標記)"" href=""http://hovertree.com/hvtimg/201601/wn0bamxp.png""><img src=""http://hovertree.com/hvtimg/201601/wn0bamxp_l.png"" style=""width:180px;height:140px;"" /></a><a title=""消滅僵屍游戲"" href=""http://hovertree.com/hvtimg/201601/q47add2k.jpg""><img src=""http://hovertree.com/hvtimg/201601/q47add2k_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""純CSS3漂亮的房子不錯的天氣"" href=""http://hovertree.com/hvtimg/201601/lbau8hqb.png""><img src=""http://hovertree.com/hvtimg/201601/lbau8hqb_l.png"" style=""width:180px;height:140px;"" /></a><a title=""HoverClock"" href=""http://hovertree.com/hvtimg/201601/thbniyjx.png""><img src=""http://hovertree.com/hvtimg/201601/thbniyjx_l.png"" style=""width:180px;height:140px;"" /></a><a title=""javascript元旦倒計時特效"" href=""http://hovertree.com/hvtimg/201512/o9qashmi.gif""><img src=""http://hovertree.com/hvtimg/201512/o9qashmi_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""下雨"" href=""http://hovertree.com/hvtimg/201512/f748s0ko.jpg""><img src=""http://hovertree.com/hvtimg/201512/f748s0ko_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""何問起直接說喜歡你！"" href=""http://hovertree.com/hvtimg/201512/vt1tf0xl.jpg""><img src=""http://hovertree.com/hvtimg/201512/vt1tf0xl_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""IIS7，IIS7.5 URL重寫模塊工具"" href=""http://hovertree.com/hvtimg/201512/ew4yb78b.png""><img src=""http://hovertree.com/hvtimg/201512/ew4yb78b_l.png"" style=""width:180px;height:140px;"" /></a><a title=""山水畫"" href=""http://hovertree.com/hvtimg/201512/agagq0or.jpg""><img src=""http://hovertree.com/hvtimg/201512/agagq0or_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""劉德華"" href=""http://hovertree.com/hvtimg/201512/r51a22uy.gif""><img src=""http://hovertree.com/hvtimg/201512/r51a22uy_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""IIS為網站設置功能變數名稱"" href=""http://hovertree.com/hvtimg/201512/69yoeuhf.jpg""><img src=""http://hovertree.com/hvtimg/201512/69yoeuhf_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""HoverTreeCMS分成"" href=""http://hovertree.com/hvtimg/201512/jgi94fdf.png""><img src=""http://hovertree.com/hvtimg/201512/jgi94fdf_l.png"" style=""width:180px;height:140px;"" /></a><a title=""範冰冰"" href=""http://hovertree.com/hvtimg/201511/6j9j6tk5.png""><img src=""http://hovertree.com/hvtimg/201511/6j9j6tk5_l.png"" style=""width:180px;height:140px;"" /></a><a title=""周末愉快"" href=""http://hovertree.com/hvtimg/201511/60mj4wsb.gif""><img src=""http://hovertree.com/hvtimg/201511/60mj4wsb_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""謝霆鋒手機背景圖"" href=""http://hovertree.com/hvtimg/201508/cnvkv745.jpg""><img src=""http://hovertree.com/hvtimg/201508/cnvkv745_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""現代舞舞蹈家瑪莎·葛蘭姆動畫Logo"" href=""http://hovertree.com/hvtimg/201506/ufigfjvn.jpg""><img src=""http://hovertree.com/hvtimg/201506/ufigfjvn_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""每次吵架，都希望男票這樣解決戰鬥。。。"" href=""http://hovertree.com/hvtimg/201506/iqoqrhfn.gif""><img src=""http://hovertree.com/hvtimg/201506/iqoqrhfn_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""現代舞舞蹈家瑪莎·葛蘭姆動畫Logo"" href=""http://hovertree.com/hvtimg/201506/xlyxp4wg.png""><img src=""http://hovertree.com/hvtimg/201506/xlyxp4wg_l.png"" style=""width:180px;height:140px;"" /></a><a title=""美女"" href=""http://hovertree.com/hvtimg/201506/m921jw4n.jpg""><img src=""http://hovertree.com/hvtimg/201506/m921jw4n_l.jpg"" style=""width:180px;height:140px;"" /></a></div>";
 14 }
 15 
 16 private void button_ok_Click(object sender, EventArgs e)
 17 {
 18 Regex m_hvtRegImg = new Regex(textBox_regex.Text, RegexOptions.IgnoreCase);
 19 
 20 
 21 //搜索匹配的字元串 
 22 MatchCollection hewenqi_matches;
 23 try
 24 {
 25 hewenqi_matches = m_hvtRegImg.Matches(textBox_content.Text);
 26 
 27 // 取得匹配項列表 
 28 foreach (Match match in hewenqi_matches)
 29 {
 30 textBox_result.Text = textBox_result.Text + match.Groups["hewenqitext"].Value + "\r\n";
 31 }
 32 }
 33 catch (Exception ex)
 34 {
 35 textBox_result.Text = ex.ToString();
 36 }
 37 
 38 }
 39 }
 40 }
 41 
 42 /*
 43 <div class="dengxaing-hovertree-com"> 
 44 
 45 <a title="何問起批量2" href=""http://hovertree.com/hvtimg/201601/p3t2ldyr.png"">
 46 <img src=""http://hovertree.com/hvtimg/201601/p3t2ldyr_l.png"" style="width:180px;height:140px;" /></a>
 47 
 48 <a title="VS2015開發人員命令提示查看PublicKeyToken(公鑰標記)" href=""http://hovertree.com/hvtimg/201601/wn0bamxp.png"">
 49 <img src=""http://hovertree.com/hvtimg/201601/wn0bamxp_l.png"" style="width:180px;height:140px;" /></a>
 50 
 51 <a title="消滅僵屍游戲" href=""http://hovertree.com/hvtimg/201601/q47add2k.jpg"">
 52 <img src=""http://hovertree.com/hvtimg/201601/q47add2k_l.jpg"" style="width:180px;height:140px;" /></a>
 53 
 54 <a title="純CSS3漂亮的房子不錯的天氣" href=""http://hovertree.com/hvtimg/201601/lbau8hqb.png"">
 55 <img src=""http://hovertree.com/hvtimg/201601/lbau8hqb_l.png"" style="width:180px;height:140px;" /></a>
 56 
 57 <a title="HoverClock" href=""http://hovertree.com/hvtimg/201601/thbniyjx.png"">
 58 <img src=""http://hovertree.com/hvtimg/201601/thbniyjx_l.png"" style="width:180px;height:140px;" /></a>
 59 
 60 <a title="javascript元旦倒計時特效" href=""http://hovertree.com/hvtimg/201512/o9qashmi.gif">
 61 <img src=""http://hovertree.com/hvtimg/201512/o9qashmi_l.gif" style="width:180px;height:140px;" /></a>
 62 
 63 <a title="下雨" href=""http://hovertree.com/hvtimg/201512/f748s0ko.jpg"">
 64 <img src=""http://hovertree.com/hvtimg/201512/f748s0ko_l.jpg"" style="width:180px;height:140px;" /></a>
 65 
 66 <a title="何問起直接說喜歡你！" href=""http://hovertree.com/hvtimg/201512/vt1tf0xl.jpg"">
 67 <img src=""http://hovertree.com/hvtimg/201512/vt1tf0xl_l.jpg"" style="width:180px;height:140px;" /></a>
 68 
 69 <a title="IIS7，IIS7.5 URL重寫模塊工具" href=""http://hovertree.com/hvtimg/201512/ew4yb78b.png"">
 70 <img src=""http://hovertree.com/hvtimg/201512/ew4yb78b_l.png"" style="width:180px;height:140px;" /></a>
 71 
 72 <a title="山水畫" href=""http://hovertree.com/hvtimg/201512/agagq0or.jpg"">
 73 <img src=""http://hovertree.com/hvtimg/201512/agagq0or_l.jpg"" style="width:180px;height:140px;" /></a>
 74 
 75 <a title="劉德華" href=""http://hovertree.com/hvtimg/201512/r51a22uy.gif">
 76 <img src=""http://hovertree.com/hvtimg/201512/r51a22uy_l.gif" style="width:180px;height:140px;" /></a>
 77 
 78 <a title="IIS為網站設置功能變數名稱" href=""http://hovertree.com/hvtimg/201512/69yoeuhf.jpg"">
 79 <img src=""http://hovertree.com/hvtimg/201512/69yoeuhf_l.jpg"" style="width:180px;height:140px;" /></a>
 80 
 81 <a title="HoverTreeCMS分成" href=""http://hovertree.com/hvtimg/201512/jgi94fdf.png"">
 82 <img src=""http://hovertree.com/hvtimg/201512/jgi94fdf_l.png"" style="width:180px;height:140px;" /></a>
 83 
 84 <a title="範冰冰" href=""http://hovertree.com/hvtimg/201511/6j9j6tk5.png"">
 85 <img src=""http://hovertree.com/hvtimg/201511/6j9j6tk5_l.png"" style="width:180px;height:140px;" /></a>
 86 
 87 <a title="周末愉快" href=""http://hovertree.com/hvtimg/201511/60mj4wsb.gif">
 88 <img src=""http://hovertree.com/hvtimg/201511/60mj4wsb_l.gif" style="width:180px;height:140px;" /></a>
 89 
 90 <a title="謝霆鋒手機背景圖" href=""http://hovertree.com/hvtimg/201508/cnvkv745.jpg"">
 91 <img src=""http://hovertree.com/hvtimg/201508/cnvkv745_l.jpg"" style="width:180px;height:140px;" /></a>
 92 
 93 <a title="現代舞舞蹈家瑪莎·葛蘭姆動畫Logo" href=""http://hovertree.com/hvtimg/201506/ufigfjvn.jpg"">
 94 <img src=""http://hovertree.com/hvtimg/201506/ufigfjvn_l.jpg"" style="width:180px;height:140px;" /></a>
 95 
 96 <a title="每次吵架，都希望男票這樣解決戰鬥。。。" href=""http://hovertree.com/hvtimg/201506/iqoqrhfn.gif">
 97 <img src=""http://hovertree.com/hvtimg/201506/iqoqrhfn_l.gif" style="width:180px;height:140px;" /></a>
 98 
 99 <a title="現代舞舞蹈家瑪莎·葛蘭姆動畫Logo" href=""http://hovertree.com/hvtimg/201506/xlyxp4wg.png"">
100 <img src=""http://hovertree.com/hvtimg/201506/xlyxp4wg_l.png"" style="width:180px;height:140px;" /></a>
101 
102 <a title="美女" href=""http://hovertree.com/hvtimg/201506/m921jw4n.jpg"">
103 <img src=""http://hovertree.com/hvtimg/201506/m921jw4n_l.jpg"" style="width:180px;height:140px;" /></a>
104 </div>
105 */

轉載自：http://hovertree.com/h/bjaf/nxoqir0b.htm

http://www.cnblogs.com/sosoft/p/kaifajishu.html