XmlValidatingReader unbelievable error

[Amar]

Hi everyone, I am trying now for 4-5 hours to write a simple code to
validate a very simple XML and i still get an error. Here is my Code,
and i always get an error at args.Exception

("The 'urn:books:catalog' element is not declared. An error occurred
at file:///c:/inetpub/wwwroot/LakisService/books.xml, (2, 2).")

private void Button2_Click(object sender, System.EventArgs e) {
XmlTextReader r = new XmlTextReader(Server.MapPath("books.xml"));
XmlSchema xs = new XmlSchema();
xs.SourceUri = Server.MapPath("books.xsd");

XmlValidatingReader v = new XmlValidatingReader(r);
v.Schemas.Add(xs);
v.ValidationType = ValidationType.Schema;
v.ValidationEventHandler += new ValidationEventHandler(MyValidation);
while (v.Read()){
}
v.Close();
}

public static void MyValidation(object sender, ValidationEventArgs
args){
string strErr="";
if (args.Exception != null){
strErr = args.Message;
}
}

HERE IS XML FILE
--------------
<?xml version="1.0" encoding="utf-8" ?>
<x:catalog xmlns:x="urn:books">
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An in-depth look at creating applications with
XML.</description>
</book>
</x:catalog>

HERE IS XSD FILE
---------------
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="catalog">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="book" minOccurs="0" maxOccurs="unbounded">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="author" type="xsd:string" />
<xsd:element name="title" type="xsd:string" />
<xsd:element name="genre" type="xsd:string" />
<xsd:element name="price" type="xsd:float" />
<xsd:element name="publish_date" type="xsd:date" />
<xsd:element name="description" type="xsd:string" />
</xsd:sequence>
<xsd:attribute name="id" type="xsd:string" />
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>
Please if anyone knows help!!

Thanks

[Oleg Tkachenko [MVP]]

Amar wrote:

<x:catalog xmlns:x="urn:books">
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An in-depth look at creating applications with
XML.</description>
</book>
</x:catalog>

HERE IS XSD FILE
---------------
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="catalog">

Well, you schema doesn't define catalog element in "urn:books"
namespace. Instead it defines catalog element in no namespace.
So either remove namespace from catalog element in your XML or change
the schema.
--
Oleg Tkachenko [XML MVP]
http://blog.tkachenko.com

[Martin Honnen]

Amar wrote:

("The 'urn:books:catalog' element is not declared. An error occurred
at file:///c:/inetpub/wwwroot/LakisService/books.xml, (2, 2).") HERE IS XML FILE
--------------
<?xml version="1.0" encoding="utf-8" ?>
<x:catalog xmlns:x="urn:books">
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An in-depth look at creating applications with
XML.</description>
</book>
</x:catalog>

HERE IS XSD FILE
---------------
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="catalog">

Well you need to define the element in the right namespace, in your
schema it has no namespace but in the XML instance it has a namespace.
However usually you need to have one schema per namespace.
--

Martin Honnen
http://JavaScript.FAQTs.com/

[Chris Lovett]

Change your schema to the following:
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns="urn:books" targetNamespace="urn:books">
"Amar" <am******@yahoo.com> wrote in message
news:7c**************************@posting.google.c om...

Hi everyone, I am trying now for 4-5 hours to write a simple code to
validate a very simple XML and i still get an error. Here is my Code,
and i always get an error at args.Exception

("The 'urn:books:catalog' element is not declared. An error occurred
at file:///c:/inetpub/wwwroot/LakisService/books.xml, (2, 2).")

private void Button2_Click(object sender, System.EventArgs e) {
XmlTextReader r = new XmlTextReader(Server.MapPath("books.xml"));
XmlSchema xs = new XmlSchema();
xs.SourceUri = Server.MapPath("books.xsd");

XmlValidatingReader v = new XmlValidatingReader(r);
v.Schemas.Add(xs);
v.ValidationType = ValidationType.Schema;
v.ValidationEventHandler += new ValidationEventHandler(MyValidation);
while (v.Read()){
}
v.Close();
}

public static void MyValidation(object sender, ValidationEventArgs
args){
string strErr="";
if (args.Exception != null){
strErr = args.Message;
}
}

HERE IS XML FILE
--------------
<?xml version="1.0" encoding="utf-8" ?>
<x:catalog xmlns:x="urn:books">
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An in-depth look at creating applications with
XML.</description>
</book>
</x:catalog>

HERE IS XSD FILE
---------------
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="catalog">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="book" minOccurs="0" maxOccurs="unbounded">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="author" type="xsd:string" />
<xsd:element name="title" type="xsd:string" />
<xsd:element name="genre" type="xsd:string" />
<xsd:element name="price" type="xsd:float" />
<xsd:element name="publish_date" type="xsd:date" />
<xsd:element name="description" type="xsd:string" />
</xsd:sequence>
<xsd:attribute name="id" type="xsd:string" />
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>
Please if anyone knows help!!

Thanks