XmlSchemaChoice Class
Important
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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.
public ref class XmlSchemaChoice : System::Xml::Schema::XmlSchemaGroupBase
public class XmlSchemaChoice : System.Xml.Schema.XmlSchemaGroupBase
type XmlSchemaChoice = class
inherit XmlSchemaGroupBase
Public Class XmlSchemaChoice
Inherits XmlSchemaGroupBase
- Inheritance
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;
};
using System;
using System.Xml;
using System.Xml.Schema;
class XMLSchemaExamples
{
public static void Main()
{
XmlSchema schema = new XmlSchema();
// <xs:element name="selected"/>
XmlSchemaElement xeSelected = new XmlSchemaElement();
xeSelected.Name = "selected";
schema.Items.Add(xeSelected);
// <xs:element name="unselected"/>
XmlSchemaElement xeUnselected = new XmlSchemaElement();
xeUnselected.Name = "unselected";
schema.Items.Add(xeUnselected);
// <xs:element name="dimpled"/>
XmlSchemaElement xeDimpled = new XmlSchemaElement();
xeDimpled.Name = "dimpled";
schema.Items.Add(xeDimpled);
// <xs:element name="perforated"/>
XmlSchemaElement xePerforated = new XmlSchemaElement();
xePerforated.Name = "perforated";
schema.Items.Add(xePerforated);
// <xs:complexType name="chadState">
XmlSchemaComplexType chadState = new XmlSchemaComplexType();
schema.Items.Add(chadState);
chadState.Name = "chadState";
// <xs:choice minOccurs="1" maxOccurs="1">
XmlSchemaChoice choice = new XmlSchemaChoice();
chadState.Particle = choice;
choice.MinOccurs = 1;
choice.MaxOccurs = 1;
// <xs:element ref="selected"/>
XmlSchemaElement elementSelected = new XmlSchemaElement();
choice.Items.Add(elementSelected);
elementSelected.RefName = new XmlQualifiedName("selected");
// <xs:element ref="unselected"/>
XmlSchemaElement elementUnselected = new XmlSchemaElement();
choice.Items.Add(elementUnselected);
elementUnselected.RefName = new XmlQualifiedName("unselected");
// <xs:element ref="dimpled"/>
XmlSchemaElement elementDimpled = new XmlSchemaElement();
choice.Items.Add(elementDimpled);
elementDimpled.RefName = new XmlQualifiedName("dimpled");
// <xs:element ref="perforated"/>
XmlSchemaElement elementPerforated = new XmlSchemaElement();
choice.Items.Add(elementPerforated);
elementPerforated.RefName = new XmlQualifiedName("perforated");
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);
}
}
Option Strict On
Option Explicit On
Imports System.Xml
Imports System.Xml.Schema
Class XMLSchemaExamples
Public Shared Sub Main()
Dim schema As New XmlSchema()
' <xs:element name="selected"/>
Dim xeSelected As New XmlSchemaElement()
xeSelected.Name = "selected"
schema.Items.Add(xeSelected)
' <xs:element name="unselected"/>
Dim xeUnselected As New XmlSchemaElement()
xeUnselected.Name = "unselected"
schema.Items.Add(xeUnselected)
' <xs:element name="dimpled"/>
Dim xeDimpled As New XmlSchemaElement()
xeDimpled.Name = "dimpled"
schema.Items.Add(xeDimpled)
' <xs:element name="perforated"/>
Dim xePerforated As New XmlSchemaElement()
xePerforated.Name = "perforated"
schema.Items.Add(xePerforated)
' <xs:complexType name="chadState">
Dim chadState As New XmlSchemaComplexType()
schema.Items.Add(chadState)
chadState.Name = "chadState"
' <xs:choice minOccurs="1" maxOccurs="1">
Dim choice As New XmlSchemaChoice()
chadState.Particle = choice
choice.MinOccurs = 1
choice.MaxOccurs = 1
' <xs:element ref="selected"/>
Dim elementSelected As New XmlSchemaElement()
choice.Items.Add(elementSelected)
elementSelected.RefName = New XmlQualifiedName("selected")
' <xs:element ref="unselected"/>
Dim elementUnselected As New XmlSchemaElement()
choice.Items.Add(elementUnselected)
elementUnselected.RefName = New XmlQualifiedName("unselected")
' <xs:element ref="dimpled"/>
Dim elementDimpled As New XmlSchemaElement()
choice.Items.Add(elementDimpled)
elementDimpled.RefName = New XmlQualifiedName("dimpled")
' <xs:element ref="perforated"/>
Dim elementPerforated As New XmlSchemaElement()
choice.Items.Add(elementPerforated)
elementPerforated.RefName = New XmlQualifiedName("perforated")
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
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>
Xml |
Initializes a new instance of the XmlSchemaChoice class. |
Annotation |
Gets or sets the |
Id |
Gets or sets the string id. (Inherited from XmlSchemaAnnotated) |
Items |
Gets the collection of the elements contained with the compositor ( |
Line |
Gets or sets the line number in the file to which the |
Line |
Gets or sets the line position in the file to which the |
Max |
Gets or sets the maximum number of times the particle can occur. (Inherited from XmlSchemaParticle) |
Max |
Gets or sets the number as a string value. Maximum number of times the particle can occur. (Inherited from XmlSchemaParticle) |
Min |
Gets or sets the minimum number of times the particle can occur. (Inherited from XmlSchemaParticle) |
Min |
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) |
Source |
Gets or sets the source location for the file that loaded the schema. (Inherited from XmlSchemaObject) |
Unhandled |
Gets or sets the qualified attributes that do not belong to the current schema's target namespace. (Inherited from XmlSchemaAnnotated) |
Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
Get |
Serves as the default hash function. (Inherited from Object) |
Get |
Gets the Type of the current instance. (Inherited from Object) |
Memberwise |
Creates a shallow copy of the current Object. (Inherited from Object) |
To |
Returns a string that represents the current object. (Inherited from Object) |
منتج | الإصدارات |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
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