/// <summary>
/// Sets the linked HTML fragment.
/// </summary>
/// <remarks>
/// Note that only simple html text with opening and closing anchor tags and href attribute with double-quotes is supported.
/// No escapes or other tags will be parsed.
/// </remarks>
/// <param name="richTextBlock">The rich text block.</param>
/// <param name="htmlFragment">The HTML fragment.</param>
public static void SetLinkedHtmlFragmentString(this RichTextBlock richTextBlock, string htmlFragment)
{
richTextBlock.Blocks.Clear();
if (string.IsNullOrEmpty(htmlFragment))
{
return;
}
var regEx = new Regex(
@"\<a\s(href\=""|[^\>]+?\shref\="")(?<link>[^""]+)"".*?\>(?<text>.*?)(\<\/a\>|$)",
RegexOptions.IgnoreCase | RegexOptions.Multiline);
int nextOffset = 0;
foreach (Match match in regEx.Matches(htmlFragment))
{
if (match.Index > nextOffset)
{
richTextBlock.AppendText(htmlFragment.Substring(nextOffset, match.Index - nextOffset));
nextOffset = match.Index + match.Length;
richTextBlock.AppendLink(match.Groups["text"].Value, new Uri(match.Groups["link"].Value));
}
//Debug.WriteLine(match.Groups["text"] + ":" + match.Groups["link"]);
}
if (nextOffset < htmlFragment.Length)
{
richTextBlock.AppendText(htmlFragment.Substring(nextOffset));
}
}
