WinForm使用正則表達(dá)式提取內(nèi)容的方法示例

來源：本站原創(chuàng)|時間：2020-01-10|欄目：C#教程|點擊：次

本文實例講述了WinForm使用正則表達(dá)式提取內(nèi)容的方法。分享給大家供大家參考，具體如下：

用VS新建WinForm程序，窗體上是三個文本框和一個按鈕。

可以自己構(gòu)造正則表達(dá)式，自己修改匹配內(nèi)容

正則表達(dá)是要提取的部分為hewenqitext

代碼如下：

using System;
using System.Text.RegularExpressions;
using System.Windows.Forms;
namespace HoverTreeBatch.HoverTree
{
public partial class RegexForm : Form
{
public RegexForm()
{
InitializeComponent();
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]*>";
textBox_content.Text = @"<div class=""dengxaing-hovertree-com""><a title=""批量2"" href=""http://localhost/hvtimg/201601/p3t2ldyr.png" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201601/p3t2ldyr_l.png"" style=""width:180px;height:140px;"" /></a><a title=""VS2015開發(fā)人員命令提示查看PublicKeyToken(公鑰標(biāo)記)"" href=""http://localhost/hvtimg/201601/wn0bamxp.png" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201601/wn0bamxp_l.png"" style=""width:180px;height:140px;"" /></a><a title=""消滅僵尸游戲"" href=""http://localhost/hvtimg/201601/q47add2k.jpg" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/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://localhost/hvtimg/201601/lbau8hqb.png" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201601/lbau8hqb_l.png"" style=""width:180px;height:140px;"" /></a><a title=""HoverClock"" href=""http://localhost/hvtimg/201601/thbniyjx.png" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201601/thbniyjx_l.png"" style=""width:180px;height:140px;"" /></a><a title=""javascript元旦倒計時特效"" href=""http://localhost/hvtimg/201512/o9qashmi.gif" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/o9qashmi_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""下雨"" href=""http://localhost/hvtimg/201512/f748s0ko.jpg" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/f748s0ko_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""直接說喜歡你！"" href=""http://localhost/hvtimg/201512/vt1tf0xl.jpg" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/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://localhost/hvtimg/201512/ew4yb78b.png" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/ew4yb78b_l.png"" style=""width:180px;height:140px;"" /></a><a title=""山水畫"" href=""http://localhost/hvtimg/201512/agagq0or.jpg" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/agagq0or_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""劉德華"" href=""http://localhost/hvtimg/201512/r51a22uy.gif" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/r51a22uy_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""IIS為網(wǎng)站設(shè)置域名"" href=""http://localhost/hvtimg/201512/69yoeuhf.jpg" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/69yoeuhf_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""HoverTreeCMS分成"" href=""http://localhost/hvtimg/201512/jgi94fdf.png" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/jgi94fdf_l.png"" style=""width:180px;height:140px;"" /></a><a title=""范冰冰"" href=""http://localhost/hvtimg/201511/6j9j6tk5.png" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201511/6j9j6tk5_l.png"" style=""width:180px;height:140px;"" /></a><a title=""周末愉快"" href=""http://localhost/hvtimg/201511/60mj4wsb.gif" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201511/60mj4wsb_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""謝霆鋒手機(jī)背景圖"" href=""http://localhost/hvtimg/201508/cnvkv745.jpg" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201508/cnvkv745_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""現(xiàn)代舞舞蹈家瑪莎·葛蘭姆動畫Logo"" href=""http://localhost/hvtimg/201506/ufigfjvn.jpg" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/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(zhàn)斗。。。"" href=""http://localhost/hvtimg/201506/iqoqrhfn.gif" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201506/iqoqrhfn_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""現(xiàn)代舞舞蹈家瑪莎·葛蘭姆動畫Logo"" href=""http://localhost/hvtimg/201506/xlyxp4wg.png" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201506/xlyxp4wg_l.png"" style=""width:180px;height:140px;"" /></a><a title=""美女"" href=""http://localhost/hvtimg/201506/m921jw4n.jpg" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201506/m921jw4n_l.jpg"" style=""width:180px;height:140px;"" /></a></div>";
}
private void button_ok_Click(object sender, EventArgs e)
{
Regex m_hvtRegImg = new Regex(textBox_regex.Text, RegexOptions.IgnoreCase);
//搜索匹配的字符串
MatchCollection hewenqi_matches;
try
{
hewenqi_matches = m_hvtRegImg.Matches(textBox_content.Text);
// 取得匹配項列表
foreach (Match match in hewenqi_matches)
{
textBox_result.Text = textBox_result.Text + match.Groups["hewenqitext"].Value + "\r\n";
}
}
catch (Exception ex)
{
textBox_result.Text = ex.ToString();
}
}
}
}
/*
<div class="dengxaing-hovertree-com">
<a title="批量2" href=""http://localhost/hvtimg/201601/p3t2ldyr.png" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201601/p3t2ldyr_l.png"" style="width:180px;height:140px;" /></a>
<a title="VS2015開發(fā)人員命令提示查看PublicKeyToken(公鑰標(biāo)記)" href=""http://localhost/hvtimg/201601/wn0bamxp.png" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201601/wn0bamxp_l.png"" style="width:180px;height:140px;" /></a>
<a title="消滅僵尸游戲" href=""http://localhost/hvtimg/201601/q47add2k.jpg" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/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://localhost/hvtimg/201601/lbau8hqb.png" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201601/lbau8hqb_l.png"" style="width:180px;height:140px;" /></a>
<a title="HoverClock" href=""http://localhost/hvtimg/201601/thbniyjx.png" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201601/thbniyjx_l.png"" style="width:180px;height:140px;" /></a>
<a title="javascript元旦倒計時特效" href=""http://localhost/hvtimg/201512/o9qashmi.gif" rel="external nofollow" rel="external nofollow" >
<img src=""http://localhost/hvtimg/201512/o9qashmi_l.gif" style="width:180px;height:140px;" /></a>
<a title="下雨" href=""http://localhost/hvtimg/201512/f748s0ko.jpg" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/f748s0ko_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="直接說喜歡你！" href=""http://localhost/hvtimg/201512/vt1tf0xl.jpg" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/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://localhost/hvtimg/201512/ew4yb78b.png" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/ew4yb78b_l.png"" style="width:180px;height:140px;" /></a>
<a title="山水畫" href=""http://localhost/hvtimg/201512/agagq0or.jpg" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/agagq0or_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="劉德華" href=""http://localhost/hvtimg/201512/r51a22uy.gif" rel="external nofollow" rel="external nofollow" >
<img src=""http://localhost/hvtimg/201512/r51a22uy_l.gif" style="width:180px;height:140px;" /></a>
<a title="IIS為網(wǎng)站設(shè)置域名" href=""http://localhost/hvtimg/201512/69yoeuhf.jpg" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/69yoeuhf_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="HoverTreeCMS分成" href=""http://localhost/hvtimg/201512/jgi94fdf.png" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/jgi94fdf_l.png"" style="width:180px;height:140px;" /></a>
<a title="范冰冰" href=""http://localhost/hvtimg/201511/6j9j6tk5.png" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201511/6j9j6tk5_l.png"" style="width:180px;height:140px;" /></a>
<a title="周末愉快" href=""http://localhost/hvtimg/201511/60mj4wsb.gif" rel="external nofollow" rel="external nofollow" >
<img src=""http://localhost/hvtimg/201511/60mj4wsb_l.gif" style="width:180px;height:140px;" /></a>
<a title="謝霆鋒手機(jī)背景圖" href=""http://localhost/hvtimg/201508/cnvkv745.jpg" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201508/cnvkv745_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="現(xiàn)代舞舞蹈家瑪莎·葛蘭姆動畫Logo" href=""http://localhost/hvtimg/201506/ufigfjvn.jpg" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/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(zhàn)斗。。。" href=""http://localhost/hvtimg/201506/iqoqrhfn.gif" rel="external nofollow" rel="external nofollow" >
<img src=""http://localhost/hvtimg/201506/iqoqrhfn_l.gif" style="width:180px;height:140px;" /></a>
<a title="現(xiàn)代舞舞蹈家瑪莎·葛蘭姆動畫Logo" href=""http://localhost/hvtimg/201506/xlyxp4wg.png" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201506/xlyxp4wg_l.png"" style="width:180px;height:140px;" /></a>
<a title="美女" href=""http://localhost/hvtimg/201506/m921jw4n.jpg" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201506/m921jw4n_l.jpg"" style="width:180px;height:140px;" /></a>
</div>
*/

PS：這里再為大家提供2款非常方便的正則表達(dá)式工具供大家參考使用：

JavaScript正則表達(dá)式在線測試工具：
http://tools.jb51.net/regex/javascript

正則表達(dá)式在線生成工具：
http://tools.jb51.net/regex/create_reg

更多關(guān)于C#相關(guān)內(nèi)容感興趣的讀者可查看本站專題：《WinForm控件用法總結(jié)》、《C#窗體操作技巧匯總》、《C#數(shù)據(jù)結(jié)構(gòu)與算法教程》、《C#常見控件用法教程》、《C#面向?qū)ο蟪绦蛟O(shè)計入門教程》及《C#程序設(shè)計之線程使用技巧總結(jié)》

希望本文所述對大家C#程序設(shè)計有所幫助。

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