XmlSchema Class
Assembly: System.Xml (in system.xml.dll)
Security Note: |
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| Exceptions raised as a result of using the XmlSchema class, such as the XmlSchemaException class may contain sensitive information that should not be exposed in untrusted scenarios. For example, the SourceUri property of an XmlSchemaException returns the URI path to the schema file that caused the exception. The SourceUri property should not be exposed in untrusted scenarios. Exceptions should be properly handled so that this sensitive information is not exposed in untrusted scenarios. |
The following example creates a schema definition.
using System; using System.Xml; using System.Xml.Schema; class XMLSchemaExamples { public static void Main() { XmlSchema schema = new XmlSchema(); // <xs:element name="cat" type="xs:string"/> XmlSchemaElement elementCat = new XmlSchemaElement(); schema.Items.Add(elementCat); elementCat.Name = "cat"; elementCat.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema"); // <xs:element name="dog" type="xs:string"/> XmlSchemaElement elementDog = new XmlSchemaElement(); schema.Items.Add(elementDog); elementDog.Name = "dog"; elementDog.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema"); // <xs:element name="redDog" substitutionGroup="dog" /> XmlSchemaElement elementRedDog = new XmlSchemaElement(); schema.Items.Add(elementRedDog); elementRedDog.Name = "redDog"; elementRedDog.SubstitutionGroup = new XmlQualifiedName("dog"); // <xs:element name="brownDog" substitutionGroup ="dog" /> XmlSchemaElement elementBrownDog = new XmlSchemaElement(); schema.Items.Add(elementBrownDog); elementBrownDog.Name = "brownDog"; elementBrownDog.SubstitutionGroup = new XmlQualifiedName("dog"); // <xs:element name="pets"> XmlSchemaElement elementPets = new XmlSchemaElement(); schema.Items.Add(elementPets); elementPets.Name = "pets"; // <xs:complexType> XmlSchemaComplexType complexType = new XmlSchemaComplexType(); elementPets.SchemaType = complexType; // <xs:choice minOccurs="0" maxOccurs="unbounded"> XmlSchemaChoice choice = new XmlSchemaChoice(); complexType.Particle = choice; choice.MinOccurs = 0; choice.MaxOccursString = "unbounded"; // <xs:element ref="cat"/> XmlSchemaElement catRef = new XmlSchemaElement(); choice.Items.Add(catRef); catRef.RefName = new XmlQualifiedName("cat"); // <xs:element ref="dog"/> XmlSchemaElement dogRef = new XmlSchemaElement(); choice.Items.Add(dogRef); dogRef.RefName = new XmlQualifiedName("dog"); XmlSchemaSet schemaSet = new XmlSchemaSet(); schemaSet.ValidationEventHandler += new ValidationEventHandler(ValidationCallbackOne); schemaSet.Add(schema); schemaSet.Compile(); XmlSchema compiledSchema = null; foreach (XmlSchema schema1 in schemaSet.Schemas()) { compiledSchema = schema1; } XmlNamespaceManager nsmgr = new XmlNamespaceManager(new NameTable()); nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema"); compiledSchema.Write(Console.Out, nsmgr); } public static void ValidationCallbackOne(object sender, ValidationEventArgs args) { Console.WriteLine(args.Message); } }
The following XML file is generated for the preceding code example.
<?xml version="1.0" encoding="IBM437"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="cat" type="xs:string"/>
<xs:element name="dog" type="xs:string"/>
<xs:element name="redDog" type="xs:string" substitutionGroup="dog"/>
<xs:element name="brownDog" type="xs:string" substitutionGroup ="dog" />
<xs:element name="pets">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element ref="cat"/>
<xs:element ref="dog"/>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:schema>
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.
Security Note: