HtmlMarkupFormatter doesn't write all attributes properly

[jcarrenog]

When I want to serialize an element, the underlying HtmlMarkupFormatter transforms any "&" characters contained in attributes into "&"

Example:

    var btn = document.CreateElement("a");
    btn.InnerHtml = "Test";
    btn.SetAttribute("href", "http://google.com?param=param&q=test");
    var html = btn.OuterHtml; // <-- http://google.com?param=param&amp;q=test

Digging into the code, I've found this in HtmlMarkupFormatter.cs, line 118

String IMarkupFormatter.Attribute(IAttr attribute)
...
    for (var i = 0; i < value.Length; i++)
    {
        switch (value[i])
        {
            case Symbols.Ampersand: temp.Append("&amp;"); break;
            case Symbols.NoBreakSpace: temp.Append("&nbsp;"); break;
            case Symbols.DoubleQuote: temp.Append("&quot;"); break;
            default: temp.Append(value[i]); break;
        }
    }

I think that, apart from the double quote, the rest of symbols are all valid into an attribute value.

[FlorianRappl]

This is by specification, see the string escaping that needs to be applied on attribute values..

[jcarrenog]

You are right. I haven't noticed that any browser behaves this way.

Thank you for your response!