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XmlSchemaKeyref Class
Visual Studio 2010
This class represents the keyref element from XMLSchema as specified by the .
System::Object
System.Xml.Schema::XmlSchemaObject
System.Xml.Schema::XmlSchemaAnnotated
System.Xml.Schema::XmlSchemaIdentityConstraint
System.Xml.Schema::XmlSchemaKeyref
System.Xml.Schema::XmlSchemaObject
System.Xml.Schema::XmlSchemaAnnotated
System.Xml.Schema::XmlSchemaIdentityConstraint
System.Xml.Schema::XmlSchemaKeyref
Assembly: System.Xml (in System.Xml.dll)
The XmlSchemaKeyref type exposes the following members.
| Name | Description | |
|---|---|---|
![]() ![]() | Annotation | Gets or sets the annotation property. (Inherited from XmlSchemaAnnotated.) |
![]() ![]() | Fields | Gets the collection of fields that apply as children for the XML Path Language (XPath) expression selector. (Inherited from XmlSchemaIdentityConstraint.) |
![]() ![]() | Id | Gets or sets the string id. (Inherited from XmlSchemaAnnotated.) |
![]() ![]() | LineNumber | Gets or sets the line number in the file to which the schema element refers. (Inherited from XmlSchemaObject.) |
![]() ![]() | LinePosition | Gets or sets the line position in the file to which the schema element refers. (Inherited from XmlSchemaObject.) |
![]() ![]() | Name | Gets or sets the name of the identity constraint. (Inherited from XmlSchemaIdentityConstraint.) |
![]() ![]() | Namespaces | Gets or sets the XmlSerializerNamespaces to use with this schema object. (Inherited from XmlSchemaObject.) |
![]() ![]() | Parent | Gets or sets the parent of this XmlSchemaObject. (Inherited from XmlSchemaObject.) |
![]() ![]() | QualifiedName | Gets the qualified name of the identity constraint, which holds the post-compilation value of the QualifiedName property. (Inherited from XmlSchemaIdentityConstraint.) |
![]() ![]() | Refer | Gets or sets the name of the key that this constraint refers to in another simple or complex type. |
![]() ![]() | Selector | Gets or sets the XPath expression selector element. (Inherited from XmlSchemaIdentityConstraint.) |
![]() ![]() | SourceUri | Gets or sets the source location for the file that loaded the schema. (Inherited from XmlSchemaObject.) |
![]() ![]() | UnhandledAttributes | Gets or sets the qualified attributes that do not belong to the current schema's target namespace. (Inherited from XmlSchemaAnnotated.) |
| Name | Description | |
|---|---|---|
![]() ![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() ![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() ![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() ![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() ![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() ![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
The following example creates a key element.
#using <System.Xml.dll> #using <System.dll> using namespace System; using namespace System::Collections; using namespace System::IO; using namespace System::Xml; using namespace System::Xml::Xsl; using namespace System::Xml::Schema; public ref class XmlSchemaObjectGenerator { private: static void ValidationCallback( Object^ /*sender*/, ValidationEventArgs^ args ) { if ( args->Severity == XmlSeverityType::Warning ) Console::Write( "WARNING: " ); else if ( args->Severity == XmlSeverityType::Error ) Console::Write( "ERROR: " ); Console::WriteLine( args->Message ); } // XmlSchemaObjectGenerator int main() { XmlTextReader^ tr = gcnew XmlTextReader( "empty.xsd" ); XmlSchema^ schema = XmlSchema::Read( tr, gcnew ValidationEventHandler( XmlSchemaObjectGenerator::ValidationCallback ) ); schema->ElementFormDefault = XmlSchemaForm::Qualified; schema->TargetNamespace = "http://www.example.com/Report"; { XmlSchemaElement^ element = gcnew XmlSchemaElement; element->Name = "purchaseReport"; XmlSchemaComplexType^ element_complexType = gcnew XmlSchemaComplexType; XmlSchemaSequence^ element_complexType_sequence = gcnew XmlSchemaSequence; { XmlSchemaElement^ element_complexType_sequence_element = gcnew XmlSchemaElement; element_complexType_sequence_element->Name = "region"; element_complexType_sequence_element->SchemaTypeName = gcnew XmlQualifiedName( "String*","http://www.w3.org/2001/XMLSchema" ); { XmlSchemaKeyref^ element_complexType_sequence_element_keyref = gcnew XmlSchemaKeyref; element_complexType_sequence_element_keyref->Name = "dummy2"; element_complexType_sequence_element_keyref->Selector = gcnew XmlSchemaXPath; element_complexType_sequence_element_keyref->Selector->XPath = "r:zip/r:part"; { XmlSchemaXPath^ field = gcnew XmlSchemaXPath; field->XPath = "@number"; element_complexType_sequence_element_keyref->Fields->Add( field ); } element_complexType_sequence_element_keyref->Refer = gcnew XmlQualifiedName( "pNumKey","http://www.example.com/Report" ); element_complexType_sequence_element->Constraints->Add( element_complexType_sequence_element_keyref ); } element_complexType_sequence->Items->Add( element_complexType_sequence_element ); } element_complexType->Particle = element_complexType_sequence; { XmlSchemaAttribute^ element_complexType_attribute = gcnew XmlSchemaAttribute; element_complexType_attribute->Name = "periodEnding"; element_complexType_attribute->SchemaTypeName = gcnew XmlQualifiedName( "date","http://www.w3.org/2001/XMLSchema" ); element_complexType->Attributes->Add( element_complexType_attribute ); } element->SchemaType = element_complexType; { XmlSchemaKey^ element_key = gcnew XmlSchemaKey; element_key->Name = "pNumKey"; element_key->Selector = gcnew XmlSchemaXPath; element_key->Selector->XPath = "r:parts/r:part"; { XmlSchemaXPath^ field = gcnew XmlSchemaXPath; field->XPath = "@number"; element_key->Fields->Add( field ); } element->Constraints->Add( element_key ); } schema->Items->Add( element ); } schema->Write( Console::Out ); return 0; } // main };
The following XML file is generated for the preceding code example.
<?xml version="1.0" encoding="IBM437"?>
<xs:schema xmlns:r="http://www.example.com/Report" elementFormDefault="qualified" targetNamespace="http://www.example.com/Report" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="purchaseReport">
<xs:complexType>
<xs:sequence>
<xs:element name="region" type="xs:string">
<xs:keyref name="dummy2" refer="r:pNumKey">
<xs:selector xpath="r:zip/r:part" />
<xs:field xpath="@number" />
</xs:keyref>
</xs:element>
</xs:sequence>
<xs:attribute name="periodEnding" type="xs:date" />
</xs:complexType>
<xs:key name="pNumKey">
<xs:selector xpath="r:parts/r:part" />
<xs:field xpath="@number" />
</xs:key>
</xs:element>
</xs:schema>
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.
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