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.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
);

For more information on members inherited from System.Object click on the link above.

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Method: Finalize()
Inherited
See base class member description: System.Object.Finalize
C# Syntax:
~XmlSchemaSimpleTypeUnion();

For more information on members inherited from System.Object click on the link above.

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Method: GetHashCode()
Inherited
See base class member description: System.Object.GetHashCode
C# Syntax:
public virtual int GetHashCode();

For more information on members inherited from System.Object click on the link above.

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Method: GetType()
Inherited
See base class member description: System.Object.GetType
C# Syntax:
public Type GetType();

For more information on members inherited from System.Object click on the link above.

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Method: MemberwiseClone()
Inherited
See base class member description: System.Object.MemberwiseClone
C# Syntax:
protected object MemberwiseClone();

For more information on members inherited from System.Object click on the link above.

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Method: ToString()
Inherited
See base class member description: System.Object.ToString
C# Syntax:
public virtual string ToString();

For more information on members inherited from System.Object click on the link above.

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