XmlSchemaAttributeGroup Class
Assembly: System.Xml (in system.xml.dll)
An attribute group can be defined only as a child of the schema element. In this case, the name attribute must be present and contain the attribute, attributeGroup, or anyAttribute elements that make up the attribute group. When a complexType or an attributeGroup element includes an attribute group, the ref attribute must be present and the name attribute is not allowed.
The following example creates the attributeGroup element.
using System; using System.Xml; using System.Xml.Schema; class XMLSchemaExamples { public static void Main() { XmlSchema schema = new XmlSchema(); // <xs:attributeGroup name="myAttributeGroup"> XmlSchemaAttributeGroup myAttributeGroup = new XmlSchemaAttributeGroup(); schema.Items.Add(myAttributeGroup); myAttributeGroup.Name = "myAttributeGroup"; // <xs:attribute name="someattribute1" type="xs:integer"/> XmlSchemaAttribute someattribute1 = new XmlSchemaAttribute(); myAttributeGroup.Attributes.Add(someattribute1); someattribute1.Name = "someattribute1"; someattribute1.SchemaTypeName = new XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema"); // <xs:attribute name="someattribute2" type="xs:string"/> XmlSchemaAttribute someattribute2 = new XmlSchemaAttribute(); myAttributeGroup.Attributes.Add(someattribute2); someattribute2.Name = "someattribute2"; someattribute2.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema"); // <xs:complexType name="myElementType"> XmlSchemaComplexType myElementType = new XmlSchemaComplexType(); schema.Items.Add(myElementType); myElementType.Name = "myElementType"; // <xs:attributeGroup ref="myAttributeGroup"/> XmlSchemaAttributeGroupRef myAttributeGroupRef = new XmlSchemaAttributeGroupRef(); myElementType.Attributes.Add(myAttributeGroupRef); myAttributeGroupRef.RefName = new XmlQualifiedName("myAttributeGroup"); // <xs:attributeGroup name="myAttributeGroupA"> XmlSchemaAttributeGroup myAttributeGroupA = new XmlSchemaAttributeGroup(); schema.Items.Add(myAttributeGroupA); myAttributeGroupA.Name = "myAttributeGroupA"; // <xs:attribute name="someattribute10" type="xs:integer"/> XmlSchemaAttribute someattribute10 = new XmlSchemaAttribute(); myAttributeGroupA.Attributes.Add(someattribute10); someattribute10.Name = "someattribute10"; someattribute10.SchemaTypeName = new XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema"); // <xs:attribute name="someattribute11" type="xs:string"/> XmlSchemaAttribute someattribute11 = new XmlSchemaAttribute(); myAttributeGroupA.Attributes.Add(someattribute11); someattribute11.Name = "someattribute11"; someattribute11.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema"); // <xs:attributeGroup name="myAttributeGroupB"> XmlSchemaAttributeGroup myAttributeGroupB = new XmlSchemaAttributeGroup(); schema.Items.Add(myAttributeGroupB); myAttributeGroupB.Name = "myAttributeGroupB"; // <xs:attribute name="someattribute20" type="xs:date"/> XmlSchemaAttribute someattribute20 = new XmlSchemaAttribute(); myAttributeGroupB.Attributes.Add(someattribute20); someattribute20.Name = "someattribute20"; someattribute20.SchemaTypeName = new XmlQualifiedName("date", "http://www.w3.org/2001/XMLSchema"); // <xs:attributeGroup ref="myAttributeGroupA"/> XmlSchemaAttributeGroupRef myAttributeGroupRefA = new XmlSchemaAttributeGroupRef(); myAttributeGroupB.Attributes.Add(myAttributeGroupRefA); myAttributeGroupRefA.RefName = new XmlQualifiedName("myAttributeGroupA"); 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:attributeGroup name="myAttributeGroup">
<xs:attribute name="someattribute1" type="xs:integer"/>
<xs:attribute name="someattribute2" type="xs:string"/>
</xs:attributeGroup>
<xs:complexType name="myElementType">
<xs:attributeGroup ref="myAttributeGroup"/>
</xs:complexType>
<xs:attributeGroup name="myAttributeGroupA">
<xs:attribute name="someattribute10" type="xs:integer"/>
<xs:attribute name="someattribute11" type="xs:string"/>
</xs:attributeGroup>
<xs:attributeGroup name="myAttributeGroupB">
<xs:attribute name="someattribute20" type="xs:date"/>
<xs:attributeGroup ref="myAttributeGroupA"/>
</xs:attributeGroup>
</xs:schema>
System.Xml.Schema.XmlSchemaObject
System.Xml.Schema.XmlSchemaAnnotated
System.Xml.Schema.XmlSchemaAttributeGroup
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.