নিম্নলিখিত উদাহরণটি একটি এক্সএমএল ফাইলকে বৈধতা দেয় এবং উপযুক্ত ত্রুটি বা সতর্কতা উত্পন্ন করে।
using System;
using System.IO;
using System.Xml;
using System.Xml.Schema;
public class Sample
{
public static void Main()
{
//Load the XmlSchemaSet.
XmlSchemaSet schemaSet = new XmlSchemaSet();
schemaSet.Add("urn:bookstore-schema", "books.xsd");
//Validate the file using the schema stored in the schema set.
//Any elements belonging to the namespace "urn:cd-schema" generate
//a warning because there is no schema matching that namespace.
Validate("store.xml", schemaSet);
Console.ReadLine();
}
private static void Validate(String filename, XmlSchemaSet schemaSet)
{
Console.WriteLine();
Console.WriteLine("\r\nValidating XML file {0}...", filename.ToString());
XmlSchema compiledSchema = null;
foreach (XmlSchema schema in schemaSet.Schemas())
{
compiledSchema = schema;
}
XmlReaderSettings settings = new XmlReaderSettings();
settings.Schemas.Add(compiledSchema);
settings.ValidationEventHandler += new ValidationEventHandler(ValidationCallBack);
settings.ValidationType = ValidationType.Schema;
//Create the schema validating reader.
XmlReader vreader = XmlReader.Create(filename, settings);
while (vreader.Read()) { }
//Close the reader.
vreader.Close();
}
//Display any warnings or errors.
private static void ValidationCallBack(object sender, ValidationEventArgs args)
{
if (args.Severity == XmlSeverityType.Warning)
Console.WriteLine("\tWarning: Matching schema not found. No validation occurred." + args.Message);
else
Console.WriteLine("\tValidation error: " + args.Message);
}
}
পূর্ববর্তী উদাহরণটি নিম্নলিখিত ইনপুট ফাইলগুলি ব্যবহার করে।
<?xml version='1.0'?>
<bookstore xmlns="urn:bookstore-schema" xmlns:cd="urn:cd-schema">
<book genre="novel">
<title>The Confidence Man</title>
<price>11.99</price>
</book>
<cd:cd>
<title>Americana</title>
<cd:artist>Offspring</cd:artist>
<price>16.95</price>
</cd:cd>
</bookstore>
books.xsd
<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>