转：C# 正则表达式提取指定文本内的内容

C# 正则表达式提取指定文本内的内容_c#正则表达式提取文本-CSDN博客

/// <summary>
        /// 截取字符串中开始和结束字符串中间的字符串
        /// </summary>
        /// <param name="source">源字符串</param>
        /// <param name="startStr">开始字符串</param>
        /// <param name="endStr">结束字符串</param>
        /// <returns>中间字符串</returns>
        public string SubstringSingle(string source, string startStr, string endStr)
        {
            Regex rg = new Regex("(?<=(" + startStr + "))[.\\s\\S]*?(?=(" + endStr + "))", RegexOptions.Multiline | RegexOptions.Singleline);
            return rg.Match(source).Value;
        }
 
        /// <summary>
        /// （批量）截取字符串中开始和结束字符串中间的字符串
        /// </summary>
        /// <param name="source">源字符串</param>
        /// <param name="startStr">开始字符串</param>
        /// <param name="endStr">结束字符串</param>
        /// <returns>中间字符串</returns>
        public List<string> SubstringMultiple(string source, string startStr, string endStr)
        {
            Regex rg = new Regex("(?<=(" + startStr + "))[.\\s\\S]*?(?=(" + endStr + "))", RegexOptions.Multiline | RegexOptions.Singleline);
            
            MatchCollection matches = rg.Matches(source);
 
            List<string> resList=new List<string>();
 
            foreach (Match item in matches)
                resList.Add(item.Value);
 
            return resList;
        }

以上可以从html中代码中提取一些数据，如从table中取表数据等。