xml validation against schema

[eXavier]

Hi,
I need to validate XML fragment against XSD schema. The main issue is that
xml fragment does not contain refrence to schema, but I want to force the
validation against the schema I have in XmlSchema object.

The scenario is as follows:
I have

string fragment;

containing xml fragment, e.g. something like
"<bookstore><book
genre="novel"><title>Abc</title><author><first-name>A</first-name><last-name

B</last-name></author><price>8.99</price></book></bookstore>"

but this xml is just fragment of larger xml document received from third
party;
and

XmlSchema schema;

containing loaded XSD of bookstore.

I need code snippet to perform validation of fragment against schema.

Thanks,
eXavier


I played a little with XmlValidatingReader, but I am no guru in XSDs and
..NET System.XML namespace, so I don't much understand what namespaces to set

NameTable nt = new NameTable();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(nt);
nsmgr.AddNamespace(String.Empty, "urn:bookstore-schema");
XmlParserContext ctx = new XmlParserContext(null, nsmgr, null,
XmlSpace.None);
XmlValidatingReader r = new XmlValidatingReader( xmlTxt,
XmlNodeType.Element, ctx);
r.Schemas.Add( schema);
r.ValidationType = ValidationType.Schema;
r.ValidationEventHandler += new ValidationEventHandler (ValidationCallBack);
while (r.Read()){}
The schema was loaded from this:

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns="urn:bookstore-schema"
elementFormDefault="qualified"
targetNamespace="urn:bookstore-schema">

<xsd:element name="bookstore" type="bookstoreType"/>

<xsd:complexType name="bookstoreType">
<xsd:sequence maxOccurs="unbounded">
<xsd:element name="book" type="bookType"/>
</xsd:sequence>
</xsd:complexType>

<xsd:complexType name="bookType">
<xsd:sequence>
<xsd:element name="title" type="xsd:string"/>
<xsd:element name="author" type="authorName"/>
<xsd:element name="price" type="xsd:decimal"/>
</xsd:sequence>
<xsd:attribute name="genre" type="xsd:string"/>
</xsd:complexType>

<xsd:complexType name="authorName">
<xsd:sequence>
<xsd:element name="first-name" type="xsd:string"/>
<xsd:element name="last-name" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>

</xsd:schema>

[SammySam]

I am not sure if one can validate a fragment against its
superset's schema, it basically turns the purpose of
schema upside down. You can for sure, try to validate the
XML before it fragments. You can definitely use
XMLValidatingReader from this link

http://msdn.microsoft.com/library/default.asp?
url=/library/en-
us/cpguide/html/cpconvalidationofxmlwithxmlvalidatingreader
..asp

useful snippets!

-----Original Message-----
Hi,
I need to validate XML fragment against XSD schema. The main issue is thatxml fragment does not contain refrence to schema, but I want to force thevalidation against the schema I have in XmlSchema object.

The scenario is as follows:
I have

string fragment;

containing xml fragment, e.g. something like
"<bookstore><book
genre="novel"><title>Abc</title><author><first- name>A</first-name><last-name

B</last-

name></author><price>8.99</price></book></bookstore>"but this xml is just fragment of larger xml document received from thirdparty;
and

XmlSchema schema;

containing loaded XSD of bookstore.

I need code snippet to perform validation of fragment against schema.
Thanks,
eXavier


I played a little with XmlValidatingReader, but I am no guru in XSDs and..NET System.XML namespace, so I don't much understand what namespaces to set
NameTable nt = new NameTable();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(nt);
nsmgr.AddNamespace(String.Empty, "urn:bookstore-schema");
XmlParserContext ctx = new XmlParserContext(null, nsmgr, null,XmlSpace.None);
XmlValidatingReader r = new XmlValidatingReader( xmlTxt,
XmlNodeType.Element, ctx);
r.Schemas.Add( schema);
r.ValidationType = ValidationType.Schema;
r.ValidationEventHandler += new ValidationEventHandler (ValidationCallBack);while (r.Read()){}
The schema was loaded from this:

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns="urn:bookstore-schema"
elementFormDefault="qualified"
targetNamespace="urn:bookstore-schema">

<xsd:element name="bookstore" type="bookstoreType"/>

<xsd:complexType name="bookstoreType">
<xsd:sequence maxOccurs="unbounded">
<xsd:element name="book" type="bookType"/>
</xsd:sequence>
</xsd:complexType>

<xsd:complexType name="bookType">
<xsd:sequence>
<xsd:element name="title" type="xsd:string"/>
<xsd:element name="author" type="authorName"/>
<xsd:element name="price" type="xsd:decimal"/>

</xsd:sequence>
<xsd:attribute name="genre" type="xsd:string"/>
</xsd:complexType>

<xsd:complexType name="authorName">
<xsd:sequence>
<xsd:element name="first-name" type="xsd:string"/>
<xsd:element name="last-name" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>

</xsd:schema>
.