Hello,

I've written a method that checks it a XML file conforms to a specific
XML schema. One of my XML schemas is rather complex and involves
namespaces etc.

Now I'm having the problem, that if I use my method with any general
XML file, that does not even has the right root element, it returns
true, which means the xml file conforms to that xsd. Bad problem :-(
When i check the XML file with XMLSpy (i have to assign the schema
first), XMLSpy says the XML file is not valid - of course.

If I use my method with a XML file, that has the right root element,
but some small error, my method complains that the XML file is not
valid - which is the right behaviour.

Valid XML files are correctly recognized as valid.

I suppose that has something to do with XML namespaces or with the
complex schema itself, because my method works well with less complex
schemas that do not contain namespaces.

So my question is, if someone can imagine what problem that could be (a
general problem in the schema, or incorrect handling of xml namespaces
in my code?). I do not want to burden you with my schema file - because
it's rather complex and huge.

Here's my method:

public static bool isXmlFileValid (string sXmlFilename, string
sXProtSchema)
        {
            Common.Reject.ifNull (sXmlFilename);
            Common.Reject.ifNull (sXProtSchema);
            bool bStatus = true;
            XmlDocument xmlDoc = new XmlDocument ();
            XmlReader xmlReader = null;
            XmlReaderSettings xmlReaderSettings = new XmlReaderSettings
();

            try
            {
                xmlReaderSettings.Schemas.Add (null, sXProtSchema);
            }
            catch (ApplicationException)
            {
                return false;
            }

            xmlReaderSettings.ValidationType = ValidationType.Schema;
            xmlReaderSettings.ConformanceLevel =
ConformanceLevel.Document;

            try
            {
                xmlReader = XmlReader.Create (sXmlFilename,
xmlReaderSettings);

                if (xmlReader != null)
                {
                    if (xmlDoc != null)
                    {
                        xmlDoc.Load (xmlReader);
                    }
                    else
                    {
                        bStatus = false;
                    }
                }
                else
                {
                    bStatus = false;
                }
            }
            catch (System.InvalidOperationException)
            {
                bStatus = false;
            }
            catch (System.Xml.Schema.XmlSchemaValidationException ex)
            {
                bStatus = false;
            }
            catch (System.Xml.XmlException)
            {
                bStatus = false;
            }
            catch (System.Exception e)
            {
                System.Console.WriteLine (e.GetType ().ToString ());
                System.Console.WriteLine (e.Message + ": " +
e.StackTrace);
                throw;
            }
            finally
            {
                if (xmlReader != null)
                {
                    xmlDoc = null;
                    xmlReader.Close ();
                    xmlReader = null;
                }
            }
            return bStatus;
        }

Thank you very much for your time.

Carsten