Type: System.Xml.Schema.XmlSchemaSimpleTypeUnion

System.Xml.Schema.XmlSchemaSimpleTypeUnion Class

Assembly: System.Xml.dll
Namespace: System.Xml.Schema

Summary: Class for the union of simpleType elements. Defines a simpleType element as a list of values of a specified data type. Represents the World Wide Web Consortium (W3C) union element.

C# Syntax:


        public class XmlSchemaSimpleTypeUnion : XmlSchemaSimpleTypeContent

Remarks

A union type enables an element or attribute value to be one or more instances of one type drawn from the union of multiple atomic and list types.

Example

The following example shows the use of XmlSchemaSimpleTypeUnion class.

using System;
using System.Xml;  
using System.Xml.Schema;

class XMLSchemaExamples {
	public static void Main() {
 
		XmlSchema schema = new XmlSchema();
		
        //<xs:simpleType name="StringOrIntType">
        XmlSchemaSimpleType StringOrIntType = new XmlSchemaSimpleType();
        StringOrIntType.Name = "StringOrIntType";
        schema.Items.Add(StringOrIntType);
        
        // <xs:union>
        XmlSchemaSimpleTypeUnion union = new XmlSchemaSimpleTypeUnion();
        StringOrIntType.Content = union;
        
        // <xs:simpleType>
        XmlSchemaSimpleType simpleType1 = new XmlSchemaSimpleType();
        union.BaseTypes.Add(simpleType1);
        
        // <xs:restriction base="xs:string"/>
        XmlSchemaSimpleTypeRestriction restriction1 = new XmlSchemaSimpleTypeRestriction();
        restriction1.BaseTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");
        simpleType1.Content = restriction1;
        
        // <xs:simpleType>
        XmlSchemaSimpleType simpleType2 = new XmlSchemaSimpleType();
        union.BaseTypes.Add(simpleType2);
        
        // <xs:restriction base="xs:int"/>
        XmlSchemaSimpleTypeRestriction restriction2 = new XmlSchemaSimpleTypeRestriction();
        restriction2.BaseTypeName = new XmlQualifiedName("int", "http://www.w3.org/2001/XMLSchema");
        simpleType2.Content = restriction2;
        

		// <xs:element name="size" type="StringOrIntType"/>
		XmlSchemaElement elementSize = new XmlSchemaElement();
		elementSize.Name = "size";
		elementSize.SchemaTypeName = new XmlQualifiedName("StringOrIntType");
		schema.Items.Add(elementSize);
		
        schema.Compile(new ValidationEventHandler(ValidationCallbackOne));
 	XmlNamespaceManager nsmgr = new XmlNamespaceManager(new NameTable());
        nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema");
        schema.Write(Console.Out, nsmgr);
	}

    public static void ValidationCallbackOne(object sender, ValidationEventArgs args) {
        Console.WriteLine(args.Message);
    }
}

The following XML file is generated for this code example.

<?xml version="1.0" encoding="IBM437"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

    <xs:simpleType name="StringOrIntType">
        <xs:union>
            <xs:simpleType>
                <xs:restriction base="xs:string"/>
            </xs:simpleType>
    
            <xs:simpleType>
                <xs:restriction base="xs:int"/>
            </xs:simpleType>
        </xs:union>
    </xs:simpleType>
    
    <xs:element name="size" type="StringOrIntType"/>
</xs:schema>

See also:

System.Xml.Schema Namespace

System.Xml.Schema.XmlSchemaSimpleTypeUnion Member List:

Public Constructors

ctor #1

Default constructor. This constructor is called by derived class constructors to initialize state in this type.

Public Properties

Annotation (inherited from System.Xml.Schema.XmlSchemaAnnotated)	Read-write See base class member description: System.Xml.Schema.XmlSchemaAnnotated.Annotation Gets or sets the annotation property.
BaseTypes	Read-only Gets the collection of base types.
Id (inherited from System.Xml.Schema.XmlSchemaAnnotated)	Read-write See base class member description: System.Xml.Schema.XmlSchemaAnnotated.Id Gets or sets the string id.
LineNumber (inherited from System.Xml.Schema.XmlSchemaObject)	Read-write See base class member description: System.Xml.Schema.XmlSchemaObject.LineNumber Gets or sets the line number in the file to which the schema element refers.
LinePosition (inherited from System.Xml.Schema.XmlSchemaObject)	Read-write See base class member description: System.Xml.Schema.XmlSchemaObject.LinePosition Gets or sets the line position in the file to which the schema element refers.
MemberTypes	Read-write Gets or sets the array of qualified member names of built-in data types or simpleType elements defined in this schema (or another schema indicated by the specified namespace).
Namespaces (inherited from System.Xml.Schema.XmlSchemaObject)	Read-write See base class member description: System.Xml.Schema.XmlSchemaObject.Namespaces
SourceUri (inherited from System.Xml.Schema.XmlSchemaObject)	Read-write See base class member description: System.Xml.Schema.XmlSchemaObject.SourceUri Gets or sets the source location for the file that loaded the schema.
UnhandledAttributes (inherited from System.Xml.Schema.XmlSchemaAnnotated)	Read-write See base class member description: System.Xml.Schema.XmlSchemaAnnotated.UnhandledAttributes Gets or sets the qualified attributes that do not belong to the schema target namespace.

Public Methods

Equals (inherited from System.Object)	See base class member description: System.Object.Equals Derived from System.Object, the primary base class for all objects.
GetHashCode (inherited from System.Object)	See base class member description: System.Object.GetHashCode Derived from System.Object, the primary base class for all objects.
GetType (inherited from System.Object)	See base class member description: System.Object.GetType Derived from System.Object, the primary base class for all objects.
ToString (inherited from System.Object)	See base class member description: System.Object.ToString Derived from System.Object, the primary base class for all objects.

Protected Methods

Finalize (inherited from System.Object)	See base class member description: System.Object.Finalize Derived from System.Object, the primary base class for all objects.
MemberwiseClone (inherited from System.Object)	See base class member description: System.Object.MemberwiseClone Derived from System.Object, the primary base class for all objects.

Hierarchy:

System.Object

System.Xml.Schema.XmlSchemaObject

System.Xml.Schema.XmlSchemaAnnotated

System.Xml.Schema.XmlSchemaSimpleTypeContent

System.Xml.Schema.XmlSchemaSimpleTypeUnion

System.Xml.Schema.XmlSchemaSimpleTypeUnion Member Details

ctor #1

Summary:: Default constructor. This constructor is called by derived class constructors to initialize state in this type.

C# Syntax:


            public XmlSchemaSimpleTypeUnion();

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Property: Annotation (read-write)

Inherited
See base class member description: System.Xml.Schema.XmlSchemaAnnotated.Annotation

Summary: Gets or sets the annotation property.

C# Syntax:


            public XmlSchemaAnnotation Annotation {get; set;}

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Property: BaseTypes (read-only)

Summary: Gets the collection of base types.

C# Syntax:


            public XmlSchemaObjectCollection BaseTypes {get;}

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Property: Id (read-write)

Inherited
See base class member description: System.Xml.Schema.XmlSchemaAnnotated.Id

Summary: Gets or sets the string id.

C# Syntax:


            public string Id {get; set;}

Remarks

The id value must be of type ID and be unique within the document containing this element.

Optional.

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Property: LineNumber (read-write)

Inherited
See base class member description: System.Xml.Schema.XmlSchemaObject.LineNumber

Summary: Gets or sets the line number in the file to which the schema element refers.

C# Syntax:


            public int LineNumber {get; set;}

Remarks

LineNumber is used to store the line number when a schema is read from a file. This is reported through XmlSchemaException for error handling.

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Property: LinePosition (read-write)

Inherited
See base class member description: System.Xml.Schema.XmlSchemaObject.LinePosition

Summary: Gets or sets the line position in the file to which the schema element refers.

C# Syntax:


            public int LinePosition {get; set;}

Remarks

This is used to store the line position when a schema is read from a file. This is reported through XmlSchemaException for error handling.

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Property: MemberTypes (read-write)

Summary: Gets or sets the array of qualified member names of built-in data types or simpleType elements defined in this schema (or another schema indicated by the specified namespace).

C# Syntax:


            public XmlQualifiedName[] MemberTypes {get; set;}

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Property: Namespaces (read-write)

Inherited
See base class member description: System.Xml.Schema.XmlSchemaObject.Namespaces

C# Syntax:


            public XmlSerializerNamespaces Namespaces {get; set;}

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Property: SourceUri (read-write)

Inherited
See base class member description: System.Xml.Schema.XmlSchemaObject.SourceUri

Summary: Gets or sets the source location for the file that loaded the schema.

C# Syntax:


            public string SourceUri {get; set;}

Remarks

Provides information for exception handling.

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Property: UnhandledAttributes (read-write)

Inherited
See base class member description: System.Xml.Schema.XmlSchemaAnnotated.UnhandledAttributes

Summary: Gets or sets the qualified attributes that do not belong to the schema target namespace.

C# Syntax:


            public XmlAttribute[] UnhandledAttributes {get; set;}

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Method: Equals(
object obj
)

Inherited
See base class member description: System.Object.Equals

C# Syntax:


            public virtual bool Equals(
   object obj
);