public PostTreeIconExtension ParseIcon(string str)
{
if (string.IsNullOrWhiteSpace(str))
{
return null;
}
try
{
var html = new HtmlDocument();
html.LoadHtml(str);
var result = html
.WalkTemplate(obj => obj.DocumentNode)
.WalkTemplate(obj => obj.FirstNonTextChild())
.WalkTemplate(obj => obj.Name.EqualsNc("img"), obj => obj)
.WalkTemplate(
obj =>
obj.GetAttributeValue("src", null) != null && obj.GetAttributeValue("title", null) != null,
obj =>
new PostTreeIconExtension()
{
Uri = obj.GetAttributeValue("src", null),
Description = obj.GetAttributeValue("title", null)
});
return result;
}
catch
{
return null;
}
}