using System;

using System.Collections.Generic;

using System.Xml;

using HtmlAgilityPack;

using System.Web;

using System.Text;

public class Program

{

    public static void Main()

    {

        BuildImageSiteMap();

​

    }

public static void BuildImageSiteMap(){

​

  string domainUrl = @"https://www.ynet.co.il/home/0,7340,L-8,00.html";

    Uri inputUri = new Uri(domainUrl); 

    string host =inputUri.Scheme +Uri.SchemeDelimiter +inputUri.Host;

​

  List<string> links = GetLinkTags(domainUrl);  

  GenerateImageSiteMap(domainUrl, links);

​

}

    private static void GenerateImageSiteMap(string domainUrl, List<string> links){

    StringBuilder builder = new StringBuilder();

        builder.Append("<urlset>");

        builder.AppendLine();

        foreach(string url in links){

        //  List<Image>images = new List<Image>(){new Image(){Src="aaaa.xa",Alt="robi"}};

            List<Image>images = GetImgTags(url);

            builder.Append("<url>");                

            builder.AppendLine();

                builder.Append("<loc>"+url+"</loc>");

                builder.AppendLine();

                foreach(Image img in images){

                    builder.Append("<image:image>");

                    builder.AppendLine();

                    builder.Append("<image:loc>"+img.Src+"</image:loc>");

                    builder.AppendLine();

                    builder.Append("<image:title>"+img.Alt+"</image:title>");

                    builder.AppendLine();

                    builder.Append("</image:image>");

                    builder.AppendLine();

                }

            builder.Append("</url>");

            builder.AppendLine();

        }

        builder.Append("</urlset>");

        string xmlResult = builder.ToString();

        Console.WriteLine(xmlResult);

    }

    private static List<string> GetLinkTags(string baseUrl){            

        List<string> links = new List<string>();

​

        HtmlWeb hw = new HtmlWeb();

        HtmlDocument doc = new HtmlDocument();

        doc = hw.Load( baseUrl);

        foreach (HtmlNode link in doc.DocumentNode.SelectNodes("//a[@href]"))

        {

            string href = link.GetAttributeValue("href", string.Empty);

            //todo: check if schema + host exists in href - if not add it

                  //  string host =inputUri.Scheme +Uri.SchemeDelimiter +inputUri.Host;

            links.Add(href);

        }

    return links;

    }

    private static List<Image> GetImgTags(string url){

            HtmlWeb hw = new HtmlWeb();

            HtmlDocument doc = hw.Load(url);

            List<Image> images = new List<Image>();

            foreach (HtmlNode link in doc.DocumentNode.SelectNodes("//img"))

            {

                Image i = new Image();

                i.Src = link.GetAttributeValue("src", string.Empty);

                i.Alt = link.GetAttributeValue("alt", string.Empty);

                images.Add(i);

                Console.WriteLine(i.Alt);

            }

    return images;

    }

}

​

public class Image{

    public string Src{get;set;}

    public string Alt {get;set;}

}