XSD question

[Mike P]

In an XSD, I want to check for my XML having at least one <folder> tag
within a <folders> tag e.g.

<?xml version="1.0" encoding="utf-8" ?>
<folders xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<folder>
<source>\\lpt0224\c$\testfolder</source>
<destination>\\slnapp02\c$\testfolder</destination>
<frequency>daily</frequency>
<backupbeforedelete>5</backupbeforedelete>
<backedup>0</backedup>
<lastbackup>23/10/2008</lastbackup>
</folder>
<folder>
<source>\\lpt0224\c$\testfolder2</source>
<destination>\\slnapp02\c$\testfolder2</destination>
<frequency>weekly</frequency>
<backupbeforedelete>2</backupbeforedelete>
<backedup>1</backedup>
<lastbackup>22/10/2008</lastbackup>
</folder>
</folders>

What is wrong with my XSD below?

<?xml version="1.0" encoding="iso-8859-1" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="folders">
<xs:complexType>
<xs:sequence>
<xs:element name="folder" minOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element name="source" type="xs:string"
minOccurs="1" />
<xs:element name="destination"
type="xs:string" minOccurs="1" />
<xs:element name="frequency"
type="Frequency" minOccurs="1" />
<xs:element name="backupbeforedelete"
type="xs:integer"
minOccurs="1" />
<xs:element name="backedup"
type="xs:integer" minOccurs="1" />
<xs:element name="lastbackup"
type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:simpleType name="Frequency">
<xs:restriction base="xs:string">
<xs:enumeration value="daily" />
<xs:enumeration value="weekly" />
<xs:enumeration value="monthly" />
</xs:restriction>
</xs:simpleType>
</xs:schema>

 

[Martin Honnen]

In an XSD, I want to check for my XML having at least one <folder> tag
within a <folders> tag e.g.

<?xml version="1.0" encoding="utf-8" ?>
<folders xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<folder>
<source>\\lpt0224\c$\testfolder</source>
<destination>\\slnapp02\c$\testfolder</destination>
<frequency>daily</frequency>
<backupbeforedelete>5</backupbeforedelete>
<backedup>0</backedup>
<lastbackup>23/10/2008</lastbackup>
</folder>
<folder>
<source>\\lpt0224\c$\testfolder2</source>
<destination>\\slnapp02\c$\testfolder2</destination>
<frequency>weekly</frequency>
<backupbeforedelete>2</backupbeforedelete>
<backedup>1</backedup>
<lastbackup>22/10/2008</lastbackup>
</folder>
</folders>

What is wrong with my XSD below?

<?xml version="1.0" encoding="iso-8859-1" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="folders">
<xs:complexType>
<xs:sequence>
<xs:element name="folder" minOccurs="1">

You need maxOccurs="unbounded" for the folder element, or at least
maxOccurs="2" to match the input sample you posted.

 

[Marc Gravell]

Do you need to set maxOccurs to "unbounded"?

According to http://www.w3schools.com/schema/el_element.asp, the default
value is 1.

Marc

 

[Mike P]

When I try to validate the XML against the schema I get the following
error :

'Data at the root level is invalid. Line 1, position 1'


Any ideas why?

 

[Martin Honnen]

When I try to validate the XML against the schema I get the following
error :

'Data at the root level is invalid. Line 1, position 1'


Any ideas why?

How exactly do you try to validate the XML? Are you using .NET code do
to that? Which one exactly?

 

[Mike P]

I am putting the XSD file on a web server, referencing it in the XML
file, and then using the following code :

xmlDoc = new XmlDocument();

xmlDoc.Load(@"c:\copyfolder\copydetails.xml");

//validate xml against xsd
XmlTextReader tr = new XmlTextReader(new
StringReader(xmlDoc.ToString()));
XmlValidatingReader trv = new XmlValidatingReader(tr);

trv.ValidationType = ValidationType.Schema;

while (trv.Read())
{
}

public void ValidateAgainstSchema(object sender, ValidationEventArgs
args)
{
blnInvalidXML = true;
}

 

[Martin Honnen]

I am putting the XSD file on a web server, referencing it in the XML
file, and then using the following code :

xmlDoc = new XmlDocument();

xmlDoc.Load(@"c:\copyfolder\copydetails.xml");

//validate xml against xsd
XmlTextReader tr = new XmlTextReader(new
StringReader(xmlDoc.ToString()));

That is completely wrong and can't work as the ToString() call on an
XmlDocument instance does not give you the document's XML markup. You
would need xmlDoc.OuterXml for that.

But the whole approach is wrong:
If you use .NET 2.0 and later then you should and could simply use an
XmlReader created with the proper XmlReaderSettings for validation. If
you also want to have an XmlDocument then pass that XmlReader to the
Load method.

If you really want to validate after creating your XmlDocument then
there is a Validate method
http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.validate.aspx

 

[Mike P]

But the whole approach is wrong:
Do you have a code example of this?

 

[Martin Honnen]

Do you have a code example of this?

XmlReaderSettings xrs = new XmlReaderSettings();
xrs.ValidationType = ValidationType.Schema;
xrs.ValidationFlags |=
XmlSchemaValidationFlags.ReportValidationWarnings;
xrs.Schemas.Add(null, "schema1.xsd");
// add further schemas if needed
xrs.ValidationEventHandler += delegate(object sender,
ValidationEventArgs vargs)
{
Console.WriteLine("{0}: {1}", vargs.Severity,
vargs.Message);
};

XmlDocument doc = new XmlDocument();
using (XmlReader rd = XmlReader.Create("file.xml", xrs))
{
doc.Load(rd);
}

 

[Mike P]

When specifying the schema in the code example, does this mean I no
longer need to reference the schema in my XML file in
xsi:noNamespaceSchemaLocation?

 

[Martin Honnen]

When specifying the schema in the code example, does this mean I no
longer need to reference the schema in my XML file in
xsi:noNamespaceSchemaLocation?

No, you don't need that, you can simply call
xrs.Schemas.Add(null, "schema1.xsd");
to add schemas as needed the XmlSchemaSet the XmlReader created from
your XmlReaderSettings xrs is going to use.