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【CSharp】 RegHelper.cs

作者:Ingram / 发布于2016/1/8/ 1508


	<div id="article_content" class="article_content">using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Text;
	using System.Text.RegularExpressions;namespace Common
	{
	 public class RegHelper
	 {
	 //返回单个路径 public static string GetImgUrl(string HTMLStr)
	 {
	 string str = string.Empty;
	 //string sPattern = @"^<img/s+[^>]*>";
	 Regex r = new Regex(@"<img/s+[^>]*/s*src/s*=/s*([']?)(?<url>/S+)'?[^>]*>",
	 RegexOptions.Compiled);
	 Match m = r.Match(HTMLStr.ToLower());
	 if (m.Success)
	 str = m.Result("${url}");
	 return str;
	 }
	 //返回多个路径的情况
	 public static StringBuilder MyGetImgUrl(string text)
	 {
	 StringBuilder str = new StringBuilder();
	 string pat = @"<img/s+[^>]*/s*src/s*=/s*([']?)(?<url>/S+)'?[^>]*>"; Regex r = new Regex(pat, RegexOptions.Compiled); Match m = r.Match(text.ToLower());
	 //int matchCount = 0;
	 while (m.Success)
	 {
	 Group g = m.Groups[2];
	 str.Append(g).Append(",");
	 m = m.NextMatch();
	 }
	 return str;
	 }
	 /// <summary>
	 /// 根据id过滤div内容
	 /// </summary>
	 /// <param name="html"></param>
	 /// <param name="id">id</param>
	 /// <param name="include_div_mask">是否包含div标记</param>
	 /// <returns></returns>
	 public static string GetDivByID(string html, string id, bool include_div_mask)
	 {
	 string regex_pattern = string.Format(include_div_mask ? @"(?is)<div[^>]*?id=""{0}.+?</div>" : @"(?is)(?<=<div[^>]*?id=""{0}[^>]+>).+?(?=</div>)", Regex.Escape(id));
	 Match m = Regex.Match(html, regex_pattern);
	 if (m.Success) return m.Value;
	 else return "";
	 }
	 }
	}</div>

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