Determine schemas used by document

[Donal McWeeney]

Hi,

Using .Net 2.0 what is the best way to determine the list of schemas used by
a XmlDocument.

Thanks

Donal

[Martin Honnen]

Donal McWeeney wrote:

Using .Net 2.0 what is the best way to determine the list of schemas used by
a XmlDocument.

Each XmlDocument instance has a property named Schemas
<http://msdn2.microsoft .com/en-us/library/system.xml.xmld ocument.schemas (VS.80).aspx>
Is that what you are looking for? Note sure what kind of "use" you have
in mind.

--

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

[Donal McWeeney]

Schemas is empty and only used (I think) for the purposes of validation.

I want to do two things:

- dynamically determine what schemas are referenced in a document so I can
build a XmlSchemaSet with the correct file paths to the actual schema files
for validating the document.

- check if a document uses a specific schema and if it does change that
schema name to a different schema...

Thanks

Donal

"Martin Honnen" <ma*******@yaho o.de> wrote in message
news:ug******** ******@TK2MSFTN GP05.phx.gbl...

Donal McWeeney wrote:

Using .Net 2.0 what is the best way to determine the list of schemas used
by a XmlDocument.

Each XmlDocument instance has a property named Schemas
<http://msdn2.microsoft .com/en-us/library/system.xml.xmld ocument.schemas (VS.80).aspx>
Is that what you are looking for? Note sure what kind of "use" you have in
mind.

--

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

[Martin Honnen]

Donal McWeeney wrote:

Schemas is empty and only used (I think) for the purposes of validation.

I want to do two things:

- dynamically determine what schemas are referenced in a document so I can
build a XmlSchemaSet with the correct file paths to the actual schema files
for validating the document.

So currently you simply load an XML document into an XmlDocument object
but you want to validate while loading using the xsi:schemaLocat ion (or
xsi:noNamespace SchemaLocaton) hints in the document?
Then you need to use an XmlReader with the proper settings e.g.

XmlReaderSettin gs readerSettings = new XmlReaderSettin gs();
readerSettings. ValidationType = ValidationType. Schema;
readerSettings. ValidationFlags |=
XmlSchemaValida tionFlags.Proce ssSchemaLocatio n;
readerSettings. ValidationEvent Handler += new
ValidationEvent Handler(Validat ionHandler);
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.Loa d(XmlReader.Cre ate(@"file.xml" , readerSettings) );
// now Schemas is a filled XmlSchemaSet
Console.WriteLi ne(xmlDocument. Schemas.Count);

I don't think there is any need to look for the schemas yourself, the
framework does that automatically if you use the proper settings as
shown above.
--

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

[Martin Honnen]

Donal McWeeney wrote:

- check if a document uses a specific schema and if it does change that
schema name to a different schema...

Does that mean you want to read out the xsi:schemaLocat ion attribute and
then change its value?

--

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

[Donal McWeeney]

Hi Martin,

thanks for the info...

- check if a document uses a specific schema and if it does change that
schema name to a different schema...

Does that mean you want to read out the xsi:schemaLocat ion attribute and
then change its value?

In this case changing the namespace name.

I dont think xsi:schemaLocat ion will work for me... thats why I have to do a
manual mapping.