XmlSchemaUnique XmlSchemaUnique XmlSchemaUnique XmlSchemaUnique Class

定義

W3C (World Wide Web Consortium) によって指定された XML スキーマの unique 要素を表します。Represents the unique element from XML Schema as specified by the World Wide Web Consortium (W3C). このクラスを使用すると、一連の要素に対して一意性を持つという制約を指定できます。This class can be used to identify a unique constraint among a set of elements.

public ref class XmlSchemaUnique : System::Xml::Schema::XmlSchemaIdentityConstraint
public class XmlSchemaUnique : System.Xml.Schema.XmlSchemaIdentityConstraint
type XmlSchemaUnique = class
    inherit XmlSchemaIdentityConstraint
Public Class XmlSchemaUnique
Inherits XmlSchemaIdentityConstraint
継承

XmlSchemaUniqueクラスの使用例を次に示します。The following example shows the use of the XmlSchemaUnique 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:complexType name="customerOrderType">
        XmlSchemaComplexType^ customerOrderType = gcnew XmlSchemaComplexType();
        customerOrderType->Name = "customerOrderType";

        // <xs:sequence>
        XmlSchemaSequence^ sequence1 = gcnew XmlSchemaSequence();

        // <xs:element name="item" minOccurs="0" maxOccurs="unbounded">
        XmlSchemaElement^ item = gcnew XmlSchemaElement();
        item->MinOccurs = 0;
        item->MaxOccursString = "unbounded";
        item->Name = "item";

        // <xs:complexType>
        XmlSchemaComplexType^ ct1 = gcnew XmlSchemaComplexType();

        // <xs:attribute name="itemID" type="xs:string"/>
        XmlSchemaAttribute^ itemID = gcnew XmlSchemaAttribute();
        itemID->Name = "itemID";
        itemID->SchemaTypeName = gcnew XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");

        // </xs:complexType>
        ct1->Attributes->Add(itemID);

        // </xs:element>
        item->SchemaType = ct1;

        // </xs:sequence>
        sequence1->Items->Add(item);
        customerOrderType->Particle = sequence1;

        // <xs:attribute name="CustomerID" type="xs:string"/>
        XmlSchemaAttribute^ CustomerID = gcnew XmlSchemaAttribute();
        CustomerID->Name = "CustomerID";
        CustomerID->SchemaTypeName = gcnew XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");

        customerOrderType->Attributes->Add(CustomerID);

        // </xs:complexType>
        schema->Items->Add(customerOrderType);

        // <xs:element name="ordersByCustomer">
        XmlSchemaElement^ ordersByCustomer = gcnew XmlSchemaElement();
        ordersByCustomer->Name = "ordersByCustomer";

        // <xs:complexType>
        XmlSchemaComplexType^ ct2 = gcnew XmlSchemaComplexType();

        // <xs:sequence>
        XmlSchemaSequence^ sequence2 = gcnew XmlSchemaSequence();

        // <xs:element name="customerOrders" type="customerOrderType" minOccurs="0" maxOccurs="unbounded" />
        XmlSchemaElement^ customerOrders = gcnew XmlSchemaElement();
        customerOrders->MinOccurs = 0;
        customerOrders->MaxOccursString = "unbounded";
        customerOrders->Name = "customerOrders";
        customerOrders->SchemaTypeName = gcnew XmlQualifiedName("customerOrderType", "");

        // </xs:sequence>
        sequence2->Items->Add(customerOrders);

        // </xs:complexType>
        ct2->Particle = sequence2;
        ordersByCustomer->SchemaType = ct2;

        // <xs:unique name="oneCustomerOrdersforEachCustomerID">
        XmlSchemaUnique^ element_unique = gcnew XmlSchemaUnique();
        element_unique->Name = "oneCustomerOrdersforEachCustomerID";

        // <xs:selector xpath="customerOrders"/>
        element_unique->Selector = gcnew XmlSchemaXPath();
        element_unique->Selector->XPath = "customerOrders";

        // <xs:field xpath="@customerID"/>
        XmlSchemaXPath^ field = gcnew XmlSchemaXPath();
        field->XPath = "@customerID";

        // </xs:unique>
        element_unique->Fields->Add(field);
        ordersByCustomer->Constraints->Add(element_unique);

        // </xs:element>
        schema->Items->Add(ordersByCustomer);

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

class XMLSchemaExamples
{
    public static void Main()
    {

        XmlSchema schema = new XmlSchema();

        // <xs:complexType name="customerOrderType">
        XmlSchemaComplexType customerOrderType = new XmlSchemaComplexType();
        customerOrderType.Name = "customerOrderType";

        // <xs:sequence>
        XmlSchemaSequence sequence1 = new XmlSchemaSequence();

        // <xs:element name="item" minOccurs="0" maxOccurs="unbounded">
        XmlSchemaElement item = new XmlSchemaElement();
        item.MinOccurs = 0;
        item.MaxOccursString = "unbounded";
        item.Name = "item";

        // <xs:complexType>
        XmlSchemaComplexType ct1 = new XmlSchemaComplexType();

        // <xs:attribute name="itemID" type="xs:string"/>
        XmlSchemaAttribute itemID = new XmlSchemaAttribute();
        itemID.Name = "itemID";
        itemID.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");

        // </xs:complexType>
        ct1.Attributes.Add(itemID);

        // </xs:element>
        item.SchemaType = ct1;

        // </xs:sequence>
        sequence1.Items.Add(item);
        customerOrderType.Particle = sequence1;

        // <xs:attribute name="CustomerID" type="xs:string"/>
        XmlSchemaAttribute CustomerID = new XmlSchemaAttribute();
        CustomerID.Name = "CustomerID";
        CustomerID.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");

        customerOrderType.Attributes.Add(CustomerID);

        // </xs:complexType>
        schema.Items.Add(customerOrderType);

        // <xs:element name="ordersByCustomer">
        XmlSchemaElement ordersByCustomer = new XmlSchemaElement();
        ordersByCustomer.Name = "ordersByCustomer";

        // <xs:complexType>
        XmlSchemaComplexType ct2 = new XmlSchemaComplexType();

        // <xs:sequence>
        XmlSchemaSequence sequence2 = new XmlSchemaSequence();

        // <xs:element name="customerOrders" type="customerOrderType" minOccurs="0" maxOccurs="unbounded" />
        XmlSchemaElement customerOrders = new XmlSchemaElement();
        customerOrders.MinOccurs = 0;
        customerOrders.MaxOccursString = "unbounded";
        customerOrders.Name = "customerOrders";
        customerOrders.SchemaTypeName = new XmlQualifiedName("customerOrderType", "");

        // </xs:sequence>
        sequence2.Items.Add(customerOrders);

        // </xs:complexType>
        ct2.Particle = sequence2;
        ordersByCustomer.SchemaType = ct2;

        // <xs:unique name="oneCustomerOrdersforEachCustomerID">
        XmlSchemaUnique element_unique = new XmlSchemaUnique();
        element_unique.Name = "oneCustomerOrdersforEachCustomerID";

        // <xs:selector xpath="customerOrders"/>
        element_unique.Selector = new XmlSchemaXPath();
        element_unique.Selector.XPath = "customerOrders";

        // <xs:field xpath="@customerID"/>
        XmlSchemaXPath field = new XmlSchemaXPath();
        field.XPath = "@customerID";

        // </xs:unique>
        element_unique.Fields.Add(field);
        ordersByCustomer.Constraints.Add(element_unique);

        // </xs:element>
        schema.Items.Add(ordersByCustomer);

        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);
    }
}
Imports System.Xml
Imports System.Xml.Schema

Class XMLSchemaExamples
    Public Shared Sub Main()

        Dim schema As New XmlSchema()

        ' <xs:complexType name="customerOrderType">
        Dim customerOrderType As New XmlSchemaComplexType()
        customerOrderType.Name = "customerOrderType"

        ' <xs:sequence>
        Dim sequence1 As New XmlSchemaSequence()

        ' <xs:element name="item" minOccurs="0" maxOccurs="unbounded">
        Dim item As New XmlSchemaElement()
        item.MinOccurs = 0
        item.MaxOccursString = "unbounded"
        item.Name = "item"

        ' <xs:complexType>
        Dim ct1 As New XmlSchemaComplexType()

        ' <xs:attribute name="itemID" type="xs:string"/>
        Dim itemID As New XmlSchemaAttribute()
        itemID.Name = "itemID"
        itemID.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema")

        ' </xs:complexType>
        ct1.Attributes.Add(itemID)

        ' </xs:element>
        item.SchemaType = ct1

        ' </xs:sequence>
        sequence1.Items.Add(item)
        customerOrderType.Particle = sequence1

        ' <xs:attribute name="CustomerID" type="xs:string"/>
        Dim CustomerID As New XmlSchemaAttribute()
        CustomerID.Name = "CustomerID"
        CustomerID.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema")

        customerOrderType.Attributes.Add(CustomerID)

        ' </xs:complexType>
        schema.Items.Add(customerOrderType)

        ' <xs:element name="ordersByCustomer">
        Dim ordersByCustomer As New XmlSchemaElement()
        ordersByCustomer.Name = "ordersByCustomer"

        ' <xs:complexType>
        Dim ct2 As New XmlSchemaComplexType()

        ' <xs:sequence>
        Dim sequence2 As New XmlSchemaSequence()

        ' <xs:element name="customerOrders" type="customerOrderType" minOccurs="0" maxOccurs="unbounded" />
        Dim customerOrders As New XmlSchemaElement()
        customerOrders.MinOccurs = 0
        customerOrders.MaxOccursString = "unbounded"
        customerOrders.Name = "customerOrders"
        customerOrders.SchemaTypeName = New XmlQualifiedName("customerOrderType", "")

        ' </xs:sequence>
        sequence2.Items.Add(customerOrders)

        ' </xs:complexType>
        ct2.Particle = sequence2
        ordersByCustomer.SchemaType = ct2

        ' <xs:unique name="oneCustomerOrdersforEachCustomerID">
        Dim element_unique As New XmlSchemaUnique()
        element_unique.Name = "oneCustomerOrdersforEachCustomerID"

        ' <xs:selector xpath="customerOrders"/>
        element_unique.Selector = New XmlSchemaXPath()
        element_unique.Selector.XPath = "customerOrders"

        ' <xs:field xpath="@customerID"/>
        Dim field As New XmlSchemaXPath()
        field.XPath = "@customerID"

        ' </xs:unique>
        element_unique.Fields.Add(field)
        ordersByCustomer.Constraints.Add(element_unique)

        ' </xs:element>
        schema.Items.Add(ordersByCustomer)

        Dim schemaSet As New XmlSchemaSet()
        AddHandler schemaSet.ValidationEventHandler, AddressOf ValidationCallbackOne

        schemaSet.Add(schema)
        schemaSet.Compile()

        Dim compiledSchema As XmlSchema = Nothing

        For Each schema1 As XmlSchema In schemaSet.Schemas()
            compiledSchema = schema1
        Next

        Dim nsmgr As New XmlNamespaceManager(New NameTable())
        nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema")
        compiledSchema.Write(Console.Out, nsmgr)

    End Sub

    Public Shared Sub ValidationCallbackOne(ByVal sender As Object, ByVal args As ValidationEventArgs)
        Console.WriteLine(args.Message)
    End Sub
End Class

このコード例では、次の XML ファイルが生成されます。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:complexType name="customerOrderType">
		<xs:sequence>
			<xs:element name="item" minOccurs="0" maxOccurs="unbounded">
				<xs:complexType>
					<xs:attribute name="itemID" type="xs:string"/>
				</xs:complexType>
			</xs:element>
		</xs:sequence>
		<xs:attribute name="CustomerID" type="xs:string"/>
	</xs:complexType>

	<xs:element name="ordersByCustomer">
		<xs:complexType>
			<xs:sequence>
				<xs:element name="customerOrders" type="customerOrderType" minOccurs="0" maxOccurs="unbounded" />
			</xs:sequence>
		</xs:complexType>
		<xs:unique name="oneCustomerOrdersforEachCustomerID">
			<xs:selector xpath="customerOrders"/>
			<xs:field xpath="@customerID"/>
		</xs:unique>
	</xs:element>
</xs:schema>

注釈

指定したスコープ内で、属性値または要素値 (あるいは属性値または要素値の組み合わせ) が一意である必要があることを指定します。Specifies that an attribute or element value (or a combination of attribute or element values) must be unique within the specified scope. 制約名は、スキーマ内で一意である必要があります。The constraint name must be unique within a schema.

コンストラクター

XmlSchemaUnique() XmlSchemaUnique() XmlSchemaUnique() XmlSchemaUnique()

XmlSchemaUnique クラスの新しいインスタンスを初期化します。Initializes a new instance of the XmlSchemaUnique class.

メソッド

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

指定したオブジェクトが、現在のオブジェクトと等しいかどうかを判断します。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

既定のハッシュ関数として機能します。Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

現在のインスタンスの Type を取得します。Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

現在の Object の簡易コピーを作成します。Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

現在のオブジェクトを表す文字列を返します。Returns a string that represents the current object.

(Inherited from Object)

プロパティ

Annotation Annotation Annotation Annotation

annotation プロパティを取得または設定します。Gets or sets the annotation property.

(Inherited from XmlSchemaAnnotated)
Fields Fields Fields Fields

XML Path Language (XPath) 式セレクターの子として適用されるフィールドのコレクションを取得します。Gets the collection of fields that apply as children for the XML Path Language (XPath) expression selector.

(Inherited from XmlSchemaIdentityConstraint)
Id Id Id Id

文字列 ID を取得または設定します。Gets or sets the string id.

(Inherited from XmlSchemaAnnotated)
LineNumber LineNumber LineNumber LineNumber

schema 要素が参照するファイルの行番号を取得または設定します。Gets or sets the line number in the file to which the schema element refers.

(Inherited from XmlSchemaObject)
LinePosition LinePosition LinePosition LinePosition

schema 要素が参照するファイルの行番号を取得または設定します。Gets or sets the line position in the file to which the schema element refers.

(Inherited from XmlSchemaObject)
Name Name Name Name

ID 制約の名前を取得または設定します。Gets or sets the name of the identity constraint.

(Inherited from XmlSchemaIdentityConstraint)
Namespaces Namespaces Namespaces Namespaces

このスキーマ オブジェクトと一緒に使用する XmlSerializerNamespaces を取得または設定します。Gets or sets the XmlSerializerNamespaces to use with this schema object.

(Inherited from XmlSchemaObject)
Parent Parent Parent Parent

この XmlSchemaObject の親を取得または設定します。Gets or sets the parent of this XmlSchemaObject.

(Inherited from XmlSchemaObject)
QualifiedName QualifiedName QualifiedName QualifiedName

QualifiedName プロパティのコンパイル後の値を保持する ID 制約の限定名を取得します。Gets the qualified name of the identity constraint, which holds the post-compilation value of the QualifiedName property.

(Inherited from XmlSchemaIdentityConstraint)
Selector Selector Selector Selector

XPath 式 selector 要素を取得または設定します。Gets or sets the XPath expression selector element.

(Inherited from XmlSchemaIdentityConstraint)
SourceUri SourceUri SourceUri SourceUri

スキーマを読み込んだファイルのソース位置を取得または設定します。Gets or sets the source location for the file that loaded the schema.

(Inherited from XmlSchemaObject)
UnhandledAttributes UnhandledAttributes UnhandledAttributes UnhandledAttributes

現在のスキーマのターゲット名前空間に属さない、修飾された属性を取得または設定します。Gets or sets the qualified attributes that do not belong to the current schema's target namespace.

(Inherited from XmlSchemaAnnotated)

適用対象