Best way to read, modify, and write XML

Question

My plan is to read in an XML document using my C# program, search for particular entries which I\'d like to change, and then write out the modified document. However, I\'ve bec

Answer 1

My favorite tool for this kind of thing is HtmlAgilityPack. I use it to parse complex HTML documents into LINQ-queryable collections. It is an extremely useful tool for querying and parsing HTML (which is often not valid XML).

For your problem, the code would look like:

var htmlDoc = HtmlAgilityPack.LoadDocument(stringOfHtml);
var images = htmlDoc.DocumentNode.SelectNodes("//img[id=lookforthis]");

if(images != null)
{
  foreach (HtmlNode node in images)  
  {  
      node.Attributes.Append("alt", "added an alt to lookforthis images.");  
  }  
}

htmlDoc.Save('output.html');