XmlSchemaChoice Class
Represents the choice element (compositor) from the XML Schema as specified by the World Wide Web Consortium (W3C). The choice allows only one of its children to appear in an instance.
Assembly: System.Xml (in System.Xml.dll)
| Name | Description | |
|---|---|---|
![]() | XmlSchemaChoice() | Initializes a new instance of the XmlSchemaChoice class. |
| Name | Description | |
|---|---|---|
![]() | Annotation | Gets or sets the annotation property.(Inherited from XmlSchemaAnnotated.) |
![]() | Id | Gets or sets the string id.(Inherited from XmlSchemaAnnotated.) |
![]() | Items | Gets the collection of the elements contained with the compositor (choice): XmlSchemaElement, XmlSchemaGroupRef, XmlSchemaChoice, XmlSchemaSequence, or XmlSchemaAny.(Overrides XmlSchemaGroupBase::Items.) |
![]() | 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.) |
![]() | MaxOccurs | Gets or sets the maximum number of times the particle can occur.(Inherited from XmlSchemaParticle.) |
![]() | MaxOccursString | Gets or sets the number as a string value. Maximum number of times the particle can occur.(Inherited from XmlSchemaParticle.) |
![]() | MinOccurs | Gets or sets the minimum number of times the particle can occur.(Inherited from XmlSchemaParticle.) |
![]() | MinOccursString | Gets or sets the number as a string value. The minimum number of times the particle can occur.(Inherited from XmlSchemaParticle.) |
![]() | 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.) |
![]() | 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 the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | MemberwiseClone() | |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
The following example creates a choice element.
#using <mscorlib.dll> #using <System.Xml.dll> using namespace System; using namespace System::Xml; using namespace System::Xml::Schema; class XmlSchemaExamples { public: static void Main() { XmlSchema^ schema = gcnew XmlSchema(); // <xs:element name="selected"/> XmlSchemaElement^ xeSelected = gcnew XmlSchemaElement(); xeSelected->Name = "selected"; schema->Items->Add(xeSelected); // <xs:element name="unselected"/> XmlSchemaElement^ xeUnselected = gcnew XmlSchemaElement(); xeUnselected->Name = "unselected"; schema->Items->Add(xeUnselected); // <xs:element name="dimpled"/> XmlSchemaElement^ xeDimpled = gcnew XmlSchemaElement(); xeDimpled->Name = "dimpled"; schema->Items->Add(xeDimpled); // <xs:element name="perforated"/> XmlSchemaElement^ xePerforated = gcnew XmlSchemaElement(); xePerforated->Name = "perforated"; schema->Items->Add(xePerforated); // <xs:complexType name="chadState"> XmlSchemaComplexType^ chadState = gcnew XmlSchemaComplexType(); schema->Items->Add(chadState); chadState->Name = "chadState"; // <xs:choice minOccurs="1" maxOccurs="1"> XmlSchemaChoice^ choice = gcnew XmlSchemaChoice(); chadState->Particle = choice; choice->MinOccurs = 1; choice->MaxOccurs = 1; // <xs:element ref="selected"/> XmlSchemaElement^ elementSelected = gcnew XmlSchemaElement(); choice->Items->Add(elementSelected); elementSelected->RefName = gcnew XmlQualifiedName("selected"); // <xs:element ref="unselected"/> XmlSchemaElement^ elementUnselected = gcnew XmlSchemaElement(); choice->Items->Add(elementUnselected); elementUnselected->RefName = gcnew XmlQualifiedName("unselected"); // <xs:element ref="dimpled"/> XmlSchemaElement^ elementDimpled = gcnew XmlSchemaElement(); choice->Items->Add(elementDimpled); elementDimpled->RefName = gcnew XmlQualifiedName("dimpled"); // <xs:element ref="perforated"/> XmlSchemaElement^ elementPerforated = gcnew XmlSchemaElement(); choice->Items->Add(elementPerforated); elementPerforated->RefName = gcnew XmlQualifiedName("perforated"); XmlSchemaSet^ schemaSet = gcnew XmlSchemaSet(); schemaSet->ValidationEventHandler += gcnew ValidationEventHandler(ValidationCallbackOne); schemaSet->Add(schema); schemaSet->Compile(); XmlSchema^ compiledSchema; 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); } static void ValidationCallbackOne(Object^ sender, ValidationEventArgs^ args) { Console::WriteLine(args->Message); } }; int main() { XmlSchemaExamples::Main(); return 0; };
The following XML file is generated for the preceding code example.
<?xml version="1.0" encoding="IBM437"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="selected"/> <xs:element name="unselected"/> <xs:element name="dimpled"/> <xs:element name="perforated"/> <xs:complexType name="chadState"> <xs:choice minOccurs="1" maxOccurs="1"> <xs:element ref="selected"/> <xs:element ref="unselected"/> <xs:element ref="dimpled"/> <xs:element ref="perforated"/> </xs:choice> </xs:complexType> </xs:schema>
Available since 1.1
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.


