发布：2020/6/9 9:10:23作者：管理员 来源：本站 浏览次数：1086
//读取网页htmlstring text = File.ReadAllText(Environment.CurrentDirectory + "//test.txt", Encoding.GetEncoding("gb2312"));
string prttern = "<a(\\s+(href=\"(?<url>([^\"])*)\"|'([^'])*'|\\w+=\"(([^\"])*)\"|'([^'])*'))+>(?<text>(.*?))</a>";
var maths = Regex.Matches(text, prttern);
//抓取出来写入的文件
using (FileStream w = new FileStream(Environment.CurrentDirectory + "//wirter.txt", FileMode.Create))
{
for (int i = 0; i < maths.Count; i++)
{
byte[] bs = Encoding.UTF8.GetBytes(string.Format("链接地址:{0}, innerhtml：{1}", maths[i].Groups["url"].Value,
maths[i].Groups["text"].Value) + "\r\n");
w.Write(bs, 0, bs.Length);
Console.WriteLine();
}
}
Console.ReadKey();
图解正则
朋友需要截取img标签的src 和data-url 跟上面差不多。。顺便附上
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
string text =File.ReadAllText(Environment.CurrentDirectory + "//test.txt", Encoding.GetEncoding("gb2312"));
string prttern = "<img(\\s*(src=\"(?<src>[^\"]*?)\"|data-url=\"(?<dataurl>[^\"]*?)\"|[-\\w]+=\"[^\"]*?\"))*\\s*/>";
var maths = Regex.Matches(text, prttern);
//抓取出来写入的文件
using (FileStream w = new FileStream(Environment.CurrentDirectory + "//wirter.txt", FileMode.Create))
{
for (int i = 0; i < maths.Count; i++)
{
byte[] bs = Encoding.UTF8.GetBytes(string.Format("图片src:{0}, 图片data-url：{1}", maths[i].Groups["src"].Value,
maths[i].Groups["dataurl"].Value) + "\r\n");
w.Write(bs, 0, bs.Length);
Console.WriteLine();
}
}
|
