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XmlSchemaSimpleTypeUnion Class

Represents the union element for simple types from XML Schema as specified by the . A union datatype can be used to specify the content of a simpleType. The value of the simpleType element must be any one of a set of alternative datatypes specified in the union. Union types are always derived types and must comprise at least two alternative datatypes.

Namespace:  System.Xml.Schema
Assembly:  System.Xml (in System.Xml.dll)

public ref class XmlSchemaSimpleTypeUnion : public XmlSchemaSimpleTypeContent

The XmlSchemaSimpleTypeUnion type exposes the following members.

  NameDescription
Public methodSupported by the XNA FrameworkXmlSchemaSimpleTypeUnionInitializes a new instance of the XmlSchemaSimpleTypeUnion class.
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  NameDescription
Public propertySupported by the XNA FrameworkAnnotationGets or sets the annotation property. (Inherited from XmlSchemaAnnotated.)
Public propertySupported by the XNA FrameworkBaseMemberTypesGets an array of XmlSchemaSimpleType objects representing the type of the simpleType element based on the BaseTypes and MemberTypes values of the simple type.
Public propertySupported by the XNA FrameworkBaseTypesGets the collection of base types.
Public propertySupported by the XNA FrameworkIdGets or sets the string id. (Inherited from XmlSchemaAnnotated.)
Public propertySupported by the XNA FrameworkLineNumberGets or sets the line number in the file to which the schema element refers. (Inherited from XmlSchemaObject.)
Public propertySupported by the XNA FrameworkLinePositionGets or sets the line position in the file to which the schema element refers. (Inherited from XmlSchemaObject.)
Public propertySupported by the XNA FrameworkMemberTypesGets 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).
Public propertySupported by the XNA FrameworkNamespacesGets or sets the XmlSerializerNamespaces to use with this schema object. (Inherited from XmlSchemaObject.)
Public propertySupported by the XNA FrameworkParentGets or sets the parent of this XmlSchemaObject. (Inherited from XmlSchemaObject.)
Public propertySupported by the XNA FrameworkSourceUriGets or sets the source location for the file that loaded the schema. (Inherited from XmlSchemaObject.)
Public propertySupported by the XNA FrameworkUnhandledAttributesGets or sets the qualified attributes that do not belong to the current schema's target namespace. (Inherited from XmlSchemaAnnotated.)
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  NameDescription
Public methodSupported by the XNA FrameworkEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by the XNA FrameworkFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by the XNA FrameworkGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by the XNA FrameworkGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodSupported by the XNA FrameworkMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by the XNA FrameworkToStringReturns a string that represents the current object. (Inherited from Object.)
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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.

The following example shows the use of XmlSchemaSimpleTypeUnion class.


#using <System.Xml.dll>

using namespace System;
using namespace System::Xml;
using namespace System::Xml::Schema;

ref class XMLSchemaExamples
{
private:
	static void ValidationCallbackOne(Object^ sender, ValidationEventArgs^ args)
    {
		Console::WriteLine(args->Message);
    }
	
public:
    static void Main()
    {
        XmlSchema^ schema = gcnew XmlSchema();

        //<xs:simpleType name="StringOrIntType">
        XmlSchemaSimpleType^ StringOrIntType = gcnew XmlSchemaSimpleType();
        StringOrIntType->Name = "StringOrIntType";
        schema->Items->Add(StringOrIntType);

        // <xs:union>
        XmlSchemaSimpleTypeUnion^ union1 = gcnew XmlSchemaSimpleTypeUnion();
        StringOrIntType->Content = union1;

        // <xs:simpleType>
        XmlSchemaSimpleType^ simpleType1 = gcnew XmlSchemaSimpleType();
        union1->BaseTypes->Add(simpleType1);

        // <xs:restriction base="xs:string"/>
        XmlSchemaSimpleTypeRestriction^ restriction1 = gcnew XmlSchemaSimpleTypeRestriction();
        restriction1->BaseTypeName = gcnew XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");
        simpleType1->Content = restriction1;

        // <xs:simpleType>
        XmlSchemaSimpleType^ simpleType2 = gcnew XmlSchemaSimpleType();
        union1->BaseTypes->Add(simpleType2);

        // <xs:restriction base="xs:int"/>
        XmlSchemaSimpleTypeRestriction^ restriction2 = gcnew XmlSchemaSimpleTypeRestriction();
        restriction2->BaseTypeName = gcnew XmlQualifiedName("int", "http://www.w3.org/2001/XMLSchema");
        simpleType2->Content = restriction2;


        // <xs:element name="size" type="StringOrIntType"/>
        XmlSchemaElement^ elementSize = gcnew XmlSchemaElement();
        elementSize->Name = "size";
        elementSize->SchemaTypeName = gcnew XmlQualifiedName("StringOrIntType");
        schema->Items->Add(elementSize);

        XmlSchemaSet^ schemaSet = gcnew XmlSchemaSet();
        schemaSet->ValidationEventHandler += gcnew ValidationEventHandler(ValidationCallbackOne);
        schemaSet->Add(schema);
        schemaSet->Compile();

        XmlSchema^ compiledSchema = nullptr;

        for each (XmlSchema^ schema1 in schemaSet->Schemas())
        {
            compiledSchema = schema1;
        }

        XmlNamespaceManager^ nsmgr = gcnew XmlNamespaceManager(gcnew NameTable());
        nsmgr->AddNamespace("xs", "http://www.w3.org/2001/XMLSchema");
		compiledSchema->Write(Console::Out, nsmgr);
    }
};

int main()
{
	XMLSchemaExamples::Main();
	return 0;
}


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>


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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