XML Validation

[uttara]

Hello All,
I am trying to validate XML file against a XSD. The trouble is, it
does not validate my file if I have the following header:
<?xml version='1.0' encoding='utf-8'?>
It gives me this error:
The data at the root level is invalid. Line 1, position 1.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.Xml.XmlException: The data at the root level
is invalid. Line 1, position 1.

Source Error:
Line 198: vr.Schemas.Add(Nothing, schemaUrl)
Line 199: AddHandler vr.ValidationEventHandler, AddressOf
ValidationHandler
Line 200: While vr.Read()
Line 201: End While
Line 202:


If I remove the encoding i.e if I have this as follows:
<?xml version='1.0'?>
it works.

Can anyone suggest what could be the problem.

[Derek Harmon]

"uttara" <pl*******@hotmail.com> wrote in message news:e3***************@TK2MSFTNGP10.phx.gbl...

I am trying to validate XML file against a XSD. The trouble is, it
does not validate my file if I have the following header:
<?xml version='1.0' encoding='utf-8'?>
It gives me this error:
The data at the root level is invalid. Line 1, position 1. : : If I remove the encoding i.e if I have this as follows:
<?xml version='1.0'?>
it works.

The explanation is elementary: your XML file is NOT encoded as UTF-8.

One possible (albeit not the only) cause: have you loaded the XML into a String
(which is UTF-16 encoded)? The XmlValidatingReader when reading it from String
source detects this discrepancy and will throw this XmlException.

If you aren't positive about the encoding, remove encoding from the XML declaration,
then add this following diagnostic after the first vr.Read( ) statement (you must read at
least once from the XmlValidatingReader for the Encoding property to be initialized):

Debug.WriteLine( vr.Encoding.EncodingName );

If that displays "Unicode (UTF-8)" to the Output window, then you have a UTF-8 file,
otherwise your file has the encoding detected.
Derek Harmon