Hi to all,

I want to create a document with a namespace like this:

<AuditFile xmlns="urn:OECD:StandardAuditFile-Tax:PT_1.00_01">

with this code:

writer.WriteStartElement("AuditFile");
writer.WriteAttributeString("xmlns", null, null, "urn:OECD:StandardAuditFile-Tax:PT_1.00_01");


But the environment tells me that I cannot redefine the prefix '' from '' to 'urn:OECD:StandardAuditFile-Tax:PT_1.00_01' inside the same tag of the initial element.

I found that

writer.WriteStartElement("AuditFile");
writer.WriteAttributeString("xmlns", "x", null, "urn:OECD:StandardAuditFile-Tax:PT_1.00_01");


gives no problem, but the output is like this:

<AuditFile xmlns:x="urn:OECD:StandardAuditFile-Tax:PT_1.00_01">

I found this information in "o'Reilly XML XSLT XPath Pocket Reference 2nd edition":

In Example 1.1, we scoped each tag with the OReilly name-space. Namespaces are declared using the
xmlns:something attribute, where something defines the prefix of the name-space. The attribute
value is a unique identifier that differentiates this namespace from all other namespaces; the use of a
URI is recommended. In this case, we use the O'Reilly URI http://www.oreilly.com as the default
namespace, which should guarantee uniqueness. A namespace declaration can appear as an attribute
of any element, in which case the namespace remains inside that element's opening and closing tags.
Here are some examples:
<OReilly:Books xmlns:OReilly='http://www.oreilly.com'>
...
</OReilly:Books>
<xsl:stylesheet xmlns:xsl='http://www.w3.org'>
...
</xsl:stylesheet>

Try the following:


/- Sam Judson : Wrox Technical Editor -/

No actually, that doesn't match up with the error you are getting.

What you should really be doing is this:

I suspect your error is because this is not the initial element in your XML stream.

/- Sam Judson : Wrox Technical Editor -/

Hello,

The first system gives the error again, and the second system creates the following structure:

<AuditFile>
  <xmlns xmlns="urn:OECD:StandardAuditFile-Tax:PT_1.00_01">

What I really want to write is:

<AuditFile xmlns="urn:OECD:StandardAuditFile-Tax:PT_1.00_01">

--

Joe (Microsoft MVP - XML)

I don't see the error you are getting with the second code segment. My complete code is as follows, and produces exactly the output you ask for:
If you are still not getting this then it must be something about the way you are setting up your XmlTextWriter, or some of the other code you are writing.

/- Sam Judson : Wrox Technical Editor -/

Hello,

In fact, my code is not exactly in the form I posted, because it's a generic XML generator.

The real instructions are these (I copied and pasted the relevant code):


XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
settings.NewLineOnAttributes = false;
XmlWriter writer = XmlWriter.Create(@sNombreFicheroXML, settings);

writer.WriteStartDocument();
writer.WriteStartElement(arTags[0]);
writer.WriteStartElement(arTags[1], sDatos);
...


where arTags[0] has the value "AuditFile", arTags[1] is "xmlns", and sDatos is "urn:...".

The result (I tested again):

<?xml version="1.0" encoding="utf-8"?>
<AuditFile>
  <xmlns xmlns="urn:OECD:StandardAuditFile-Tax:PT_1.00_01">

Hello,

Sorry, after posting the message I saw the bug. It must be:

XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
settings.NewLineOnAttributes = false;
XmlWriter writer = XmlWriter.Create(@sNombreFicheroXML, settings);

writer.WriteStartElement(arTags[0], sDatos);
...


Thank you!

And to do something like this?

<AuditFile xmlns="urn:OECD:StandardAuditFile-Tax:PT_1.00_01" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="ReadsoftInvoice.xsd ">

That's the line I wanted to write from the beginning... I exclude the other namespaces to simplify.

I found it!


XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
settings.NewLineOnAttributes = false;
XmlWriter writer = XmlWriter.Create(@sNombreFicheroXML, settings);

writer.WriteStartElement("AuditFile", "urn:OECD:StandardAuditFile-Tax:PT_1.00_01");
writer.WriteAttributeString("xmlns", null, null, "urn:OECD:StandardAuditFile-Tax:PT_1.00_01");
writer.WriteAttributeString("xmlns", "xsi", null, "http://www.w3.org/2001/XMLSchema-instance");