This article describes how WinForm uses regular expressions to extract content. Share it for your reference, as follows:
Create a new WinForm program with VS, and there are three text boxes and a button on the form.
You can construct regular expressions yourself and modify the matching content yourself
The part to be extracted is hewenqitext
The code is as follows:
using System;
using ;
using ;
namespace
{
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=""Batch 2"" href=""http://localhost/hvtimg/201601/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201601/p3t2ldyr_l.png"" style=""width:180px;height:140px;"" /></a><a title=""VS2015 Developer Command Prompt View PublicKeyToken(Public Key Tag)"" href=""http://localhost/hvtimg/201601/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201601/wn0bamxp_l.png"" style=""width:180px;height:140px;"" /></a><a title=""Zombie Game"" href=""http://localhost/hvtimg/201601/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201601/q47add2k_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""Pure CSS3 beautiful house with good weather"" href=""http://localhost/hvtimg/201601/" 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/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201601/thbniyjx_l.png"" style=""width:180px;height:140px;"" /></a><a title=""javascript New Year's Day countdown special effect"" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/o9qashmi_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""Raining"" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/f748s0ko_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""Speak directly like you! "" href=""http://localhost/hvtimg/201512/" 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 rewrite module tool"" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/ew4yb78b_l.png"" style=""width:180px;height:140px;"" /></a><a title=""landscape painting"" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/agagq0or_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""Andy Lau"" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/r51a22uy_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""IIS sets a domain name for a website"" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/69yoeuhf_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""HoverTreeCMS divided into"" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201512/jgi94fdf_l.png"" style=""width:180px;height:140px;"" /></a><a title=""Fan Bingbing"" href=""http://localhost/hvtimg/201511/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201511/6j9j6tk5_l.png"" style=""width:180px;height:140px;"" /></a><a title=""Happy weekend"" href=""http://localhost/hvtimg/201511/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201511/60mj4wsb_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""Nickname Tse mobile phone background image"" href=""http://localhost/hvtimg/201508/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201508/cnvkv745_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""Modern dancer Martha Gram Animation Logo"" href=""http://localhost/hvtimg/201506/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201506/ufigfjvn_l.jpg"" style=""width:180px;height:140px;"" /></a><a title=""Every time I quarrel, I hope that the male vote will resolve the battle in this way. . . "" href=""http://localhost/hvtimg/201506/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201506/iqoqrhfn_l.gif"" style=""width:180px;height:140px;"" /></a><a title=""Modern dancer Martha Gram Animation Logo"" href=""http://localhost/hvtimg/201506/" rel="external nofollow" rel="external nofollow" "><img src=""http://localhost/hvtimg/201506/xlyxp4wg_l.png"" style=""width:180px;height:140px;"" /></a><a title=""beauty"" href=""http://localhost/hvtimg/201506/" 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, );
//Search for matching stringsMatchCollection hewenqi_matches;
try
{
hewenqi_matches = m_hvtRegImg.Matches(textBox_content.Text);
// Get the match listforeach (Match match in hewenqi_matches)
{
textBox_result.Text = textBox_result.Text + ["hewenqitext"].Value + "\r\n";
}
}
catch (Exception ex)
{
textBox_result.Text = ();
}
}
}
}
/*
<div class="dengxaing-hovertree-com">
<a title="Batch 2" href=""http://localhost/hvtimg/201601/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201601/p3t2ldyr_l.png"" style="width:180px;height:140px;" /></a>
<a title="VS2015 Developer Command Prompt View PublicKeyToken(Public Key Tag)" href=""http://localhost/hvtimg/201601/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201601/wn0bamxp_l.png"" style="width:180px;height:140px;" /></a>
<a title="Zombie Elimination Game" href=""http://localhost/hvtimg/201601/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201601/q47add2k_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="Pure CSS3 beautiful house with good weather" href=""http://localhost/hvtimg/201601/" 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/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201601/thbniyjx_l.png"" style="width:180px;height:140px;" /></a>
<a title="javascript New Year's Day countdown special effect" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" >
<img src=""http://localhost/hvtimg/201512/o9qashmi_l.gif" style="width:180px;height:140px;" /></a>
<a title="Raising" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/f748s0ko_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="Speak directly that I like you!" href=""http://localhost/hvtimg/201512/" 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 rewrite module tool" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/ew4yb78b_l.png"" style="width:180px;height:140px;" /></a>
<a title="Landscape Painting" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/agagq0or_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="Andy Lau" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" >
<img src=""http://localhost/hvtimg/201512/r51a22uy_l.gif" style="width:180px;height:140px;" /></a>
<a title="IIS sets a domain name for the website" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/69yoeuhf_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="HoverTreeCMS divided into" href=""http://localhost/hvtimg/201512/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201512/jgi94fdf_l.png"" style="width:180px;height:140px;" /></a>
<a title="Fan Bingbing" href=""http://localhost/hvtimg/201511/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201511/6j9j6tk5_l.png"" style="width:180px;height:140px;" /></a>
<a title="Happy weekend" href=""http://localhost/hvtimg/201511/" rel="external nofollow" rel="external nofollow" >
<img src=""http://localhost/hvtimg/201511/60mj4wsb_l.gif" style="width:180px;height:140px;" /></a>
<a title="Nicholas Tse mobile phone background image" href=""http://localhost/hvtimg/201508/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201508/cnvkv745_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="Modern dancer Martha Gram Animation Logo" href=""http://localhost/hvtimg/201506/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201506/ufigfjvn_l.jpg"" style="width:180px;height:140px;" /></a>
<a title="Every time I quarrel, I hope that the male vote will resolve the battle like this..." href=""http://localhost/hvtimg/201506/" rel="external nofollow" rel="external nofollow" >
<img src=""http://localhost/hvtimg/201506/iqoqrhfn_l.gif" style="width:180px;height:140px;" /></a>
<a title="Modern dancer Martha Gram Animation Logo" href=""http://localhost/hvtimg/201506/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201506/xlyxp4wg_l.png"" style="width:180px;height:140px;" /></a>
<a title="Beauty" href=""http://localhost/hvtimg/201506/" rel="external nofollow" rel="external nofollow" ">
<img src=""http://localhost/hvtimg/201506/m921jw4n_l.jpg"" style="width:180px;height:140px;" /></a>
</div>
*/
PS: Here are two very convenient regular expression tools for your reference:
JavaScript regular expression online testing tool:
http://tools./regex/javascript
Regular expression online generation tool:
http://tools./regex/create_reg
For more information about C# related content, please check out the topic of this site:Summary of WinForm control usage》、《Summary of C# form operation skills》、《C# data structure and algorithm tutorial》、《Tutorial on the usage of common C# controls》、《Introduction to C# object-oriented programming tutorial"and"Summary of thread usage techniques for C# programming》
I hope this article will be helpful to everyone's C# programming.