Force the prefix of the document element

[BizTalk Benjamin]

Hi, I have an XmlDocument loaded from a memory stream. I set the document
element prefix in this way

XmlElement e = xDoc.DocumentEl ement;
e.Prefix = "abc"

When i simply write the document element to the command line it shows the
prefix. However, it does not persist in the XmlDoc so when i save the XmlDoc
into a file, the prefix is no longer there.

Can anyone help? I need to sort this out rather urgently.

Thanks,
Benjy

[Martin Honnen]

BizTalk Benjamin wrote:

Hi, I have an XmlDocument loaded from a memory stream. I set the document
element prefix in this way

XmlElement e = xDoc.DocumentEl ement;
e.Prefix = "abc"

When i simply write the document element to the command line it shows the
prefix. However, it does not persist in the XmlDoc so when i save the XmlDoc
into a file, the prefix is no longer there.

Can anyone help? I need to sort this out rather urgently.

What exactly do you want to achieve? Once a node has been created you
can't change its namespace.
See the documentation of prefix
<http://msdn.microsoft. com/library/default.asp?url =/library/en-us/cpref/html/frlrfSystemXmlX mlElementClassP refixTopic.asp>
which says
"Setting this property changes the Name property, which holds the
qualified name for an XmlElement. However, changing the prefix does not
change the namespace URI of the element."

So you can change the prefix if you want but the namespace of the
element does not change, e.g.

XmlDocument xmlDocument = new XmlDocument();
xmlDocument.Loa dXml(
"<g:gods xmlns:g=\"http://example.com/2006/gods\" />");
xmlDocument.Sav e(Console.Out);
xmlDocument.Doc umentElement.Pr efix = "h";
xmlDocument.Sav e(Console.Out);

outputs

<g:gods xmlns:g="http://example.com/2006/gods" />

for the first Save call and

<h:gods xmlns:g="http://example.com/2006/gods"
xmlns:h="http://example.com/2006/gods" />

for the second Save call.

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

[BizTalk Benjamin]

Martin,
thanks for getting back. I want to achieve the result shown by the second
save, but the difference is that when i load the file, the root element does
not have a prefix and i want it to have one at the end .

Basically i am trying to send data to a Biztalk webservice and a file with
this format
"<gods xmlns ="http://example.com/2006/gods\" />") will not validate
successfully. I need to set the g: prefix for gods in the root element and
the namespace. in the ,NET component where i am serialising a class that
represents this XSD, i can set the prefix of the namespace, but i cannot make
it set the prefix for the root element.

After the save I wrote the xmlDOc OuterXml and InnerXml to the console and a
file but the prefix didnt show up.

Benjy

"Martin Honnen" wrote:

BizTalk Benjamin wrote:

Hi, I have an XmlDocument loaded from a memory stream. I set the document
element prefix in this way

XmlElement e = xDoc.DocumentEl ement;
e.Prefix = "abc"

When i simply write the document element to the command line it shows the
prefix. However, it does not persist in the XmlDoc so when i save the XmlDoc
into a file, the prefix is no longer there.

Can anyone help? I need to sort this out rather urgently.

What exactly do you want to achieve? Once a node has been created you
can't change its namespace.
See the documentation of prefix
<http://msdn.microsoft. com/library/default.asp?url =/library/en-us/cpref/html/frlrfSystemXmlX mlElementClassP refixTopic.asp>
which says
"Setting this property changes the Name property, which holds the
qualified name for an XmlElement. However, changing the prefix does not
change the namespace URI of the element."

So you can change the prefix if you want but the namespace of the
element does not change, e.g.

XmlDocument xmlDocument = new XmlDocument();
xmlDocument.Loa dXml(
"<g:gods xmlns:g=\"http://example.com/2006/gods\" />");
xmlDocument.Sav e(Console.Out);
xmlDocument.Doc umentElement.Pr efix = "h";
xmlDocument.Sav e(Console.Out);

outputs

<g:gods xmlns:g="http://example.com/2006/gods" />

for the first Save call and

<h:gods xmlns:g="http://example.com/2006/gods"
xmlns:h="http://example.com/2006/gods" />

for the second Save call.

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

[Martin Honnen]

BizTalk Benjamin wrote:

Basically i am trying to send data to a Biztalk webservice and a file with
this format
"<gods xmlns ="http://example.com/2006/gods\" />") will not validate
successfully. I need to set the g: prefix for gods in the root element and
the namespace.

Once a node has been created you cannot change/set the namespace.
Setting a prefix works for me (tested with .NET 1.1):

XmlDocument xmlDocument = new XmlDocument();
xmlDocument.Loa dXml(
"<gods xmlns=\"http://example.com/2006/gods\" />");
xmlDocument.Sav e(Console.Out);
Console.WriteLi ne();
xmlDocument.Doc umentElement.Pr efix = "h";
xmlDocument.Sav e(Console.Out);

gives

<?xml version="1.0" encoding="utf-8"?>
<gods xmlns="http://example.com/2006/gods" />
<?xml version="1.0" encoding="utf-8"?>
<h:gods xmlns="http://example.com/2006/gods"
xmlns:h="http://example.com/2006/gods" />
--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

[BizTalk Benjamin]

Okay, thanks ..I'll look into other options to force prefixes when needed.

cheers,
benjy
"Martin Honnen" wrote:

BizTalk Benjamin wrote:

Basically i am trying to send data to a Biztalk webservice and a file with
this format
"<gods xmlns ="http://example.com/2006/gods\" />") will not validate
successfully. I need to set the g: prefix for gods in the root element and
the namespace.

Once a node has been created you cannot change/set the namespace.
Setting a prefix works for me (tested with .NET 1.1):

XmlDocument xmlDocument = new XmlDocument();
xmlDocument.Loa dXml(
"<gods xmlns=\"http://example.com/2006/gods\" />");
xmlDocument.Sav e(Console.Out);
Console.WriteLi ne();
xmlDocument.Doc umentElement.Pr efix = "h";
xmlDocument.Sav e(Console.Out);

gives

<?xml version="1.0" encoding="utf-8"?>
<gods xmlns="http://example.com/2006/gods" />
<?xml version="1.0" encoding="utf-8"?>
<h:gods xmlns="http://example.com/2006/gods"
xmlns:h="http://example.com/2006/gods" />
--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/