XmlWriter / XmlTextWriter corrupt chars...

[Mat]

Hi all.
I can't understand the problem with my code...
I wrote a simple test function to write an XML document and in the
resulting file I find 3 strange chars before the document starting.

=== CODE ===

using( XmlTextWriter w = new
XmlTextWriter("test2.xml",System.Text.Encoding.UTF 8) )
{
w.Namespaces = false;
w.Indentation = 4;
w.Formatting = Formatting.Indented;
w.WriteStartDocument();
w.WriteStartElement("root");
w.WriteStartElement("item");
w.WriteAttributeString("attr","123");
w.WriteEndElement();
w.WriteEndElement();
w.WriteEndDocument();
w.Close();
}

===

And the result I get is:

===

<?xml version="1.0" encoding="utf-8"?>
<root>
<item attr="123" />
</root>

===

Help me please!

[Mat]

Mat wrote:

>
And the result I get is:

===

<?xml version="1.0" encoding="utf-8"?>
<root>
<item attr="123" />
</root>

===

Help me please!

Sorry, these chars aren't ASCII standards so they are not visible
here...
Value in HEX:

EF BB BF

[Oleg Tkachenko [MVP]]

These are Unicode Byte Order Mark and they are ok.
But if you really really want to omit them (BOM is optional in UTF-8),
use this:
XmlTextWriter("test2.xml", new System.Text.UTF8Encoding(false)) )

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

Hi all.
I can't understand the problem with my code...
I wrote a simple test function to write an XML document and in the
resulting file I find 3 strange chars before the document starting.

=== CODE ===

using( XmlTextWriter w = new
XmlTextWriter("test2.xml",System.Text.Encoding.UTF 8) )
{
w.Namespaces = false;
w.Indentation = 4;
w.Formatting = Formatting.Indented;
w.WriteStartDocument();
w.WriteStartElement("root");
w.WriteStartElement("item");
w.WriteAttributeString("attr","123");
w.WriteEndElement();
w.WriteEndElement();
w.WriteEndDocument();
w.Close();
}

===

And the result I get is:

===

<?xml version="1.0" encoding="utf-8"?>
<root>
<item attr="123" />
</root>

===

Help me please!

[Mat]

Oleg Tkachenko [MVP] wrote:

These are Unicode Byte Order Mark and they are ok.
But if you really really want to omit them (BOM is optional in UTF-8),
use this:
XmlTextWriter("test2.xml", new System.Text.UTF8Encoding(false)) )

Perfect !
Thank you very much Oleg.

Just for reference:
http://en.wikipedia.org/wiki/Byte_Order_Mark
I learnt a new thing :)