using System;

using System.Text.RegularExpressions;   

​

​

    public class HTMLUtil

    {

        /// <summary>

        /// Doplni Guid na vsechny html prvky, kde chybi

        /// </summary>

        /// <param name="HTML">HTML kod</param>

        /// <param name="attrName">jmeno atributu, kde ma byt guid</param>

        /// <returns>upraveny HTML kod</returns>

        public string PrepareHTMLForCommenting (string HTML, string attrName = "data-guid") {

            Regex regex = new Regex(@"<(?!\/)\w+?(?=>)");

            if (attrName.Length == 0) throw new ArgumentException("Atribut musí mít délku alespoň jeden znak.");

            this.AttrNameForGuidCommenting = attrName;

            return regex.Replace(HTML, new MatchEvaluator(RegexReadTermForCommenting));

        }

​

        private string AttrNameForGuidCommenting { get; set; }

​

        private string RegexReadTermForCommenting(Match m)

        {

            return m.Groups[0] + " " + this.AttrNameForGuidCommenting + "=\"" + Guid.NewGuid().ToString() + "\"";

        }

    }

​

​

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(new HTMLUtil().PrepareHTMLForCommenting("<div><p></p></div>"));

    }

}