Microsoft XML - How to handle control characters in XML?

Author

How to handle control characters in XML?

Gustavo Echevarria

2006-06-27, 8:27 pm

Hello all

As is well know the control characters below 1F cannot be written in a XML,
nor in entities nor in characters. But what happens if i want to serialize a
XML with those chars? how can i make the transition inside the XML from
text? i saw that the internet explorer (for example) allows the load of such
a XML ... how it do the parse? The thing i want to make is the following, i
get a text from a control, encapsulate it inside a XML, transfer and read,
get the original text.

This is a XML example
<P V="?"/> or <P V=""/>

i can make the XML, but i can't load it using the MSXML.

Thanks in advance
Gustavo Echevarria

Oleg Tkachenko [MVP]

2006-06-27, 8:27 pm

Gustavo Echevarria wrote:
> Hello all
>
> As is well know the control characters below 1F cannot be written in a XML,
> nor in entities nor in characters. But what happens if i want to serialize a
> XML with those chars? how can i make the transition inside the XML from
> text? i saw that the internet explorer (for example) allows the load of such
> a XML ... how it do the parse?

That's a bug in IE, it's too forgiving.

> The thing i want to make is the following, i
> get a text from a control, encapsulate it inside a XML, transfer and read,
> get the original text.

One way is to use Base64 encoding, another - to replace control
characters with your own encoding scheme, e.g. "__0x5__".

--
Oleg Tkachenko [XML MVP, MCAD]
http://www.XmlLab.Net | http://www.XLinq.Net | http://blog.tkachenko.com