XmlSchemaElement Class
Important
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Represents the element
element from XML Schema as specified by the World Wide Web Consortium (W3C). This class is the base class for all particle types and is used to describe an element in an XML document.
public ref class XmlSchemaElement : System::Xml::Schema::XmlSchemaParticle
public class XmlSchemaElement : System.Xml.Schema.XmlSchemaParticle
type XmlSchemaElement = class
inherit XmlSchemaParticle
Public Class XmlSchemaElement
Inherits XmlSchemaParticle
- Inheritance
The following example creates the element
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="cat" type="string"/>
XmlSchemaElement^ elementCat = gcnew XmlSchemaElement();
schema->Items->Add(elementCat);
elementCat->Name = "cat";
elementCat->SchemaTypeName = gcnew XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");
// <xs:element name="dog" type="string"/>
XmlSchemaElement^ elementDog = gcnew XmlSchemaElement();
schema->Items->Add(elementDog);
elementDog->Name = "dog";
elementDog->SchemaTypeName = gcnew XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");
// <xs:element name="redDog" substitutionGroup="dog" />
XmlSchemaElement^ elementRedDog = gcnew XmlSchemaElement();
schema->Items->Add(elementRedDog);
elementRedDog->Name = "redDog";
elementRedDog->SubstitutionGroup = gcnew XmlQualifiedName("dog");
// <xs:element name="brownDog" substitutionGroup ="dog" />
XmlSchemaElement^ elementBrownDog = gcnew XmlSchemaElement();
schema->Items->Add(elementBrownDog);
elementBrownDog->Name = "brownDog";
elementBrownDog->SubstitutionGroup = gcnew XmlQualifiedName("dog");
// <xs:element name="pets">
XmlSchemaElement^ elementPets = gcnew XmlSchemaElement();
schema->Items->Add(elementPets);
elementPets->Name = "pets";
// <xs:complexType>
XmlSchemaComplexType^ complexType = gcnew XmlSchemaComplexType();
elementPets->SchemaType = complexType;
// <xs:choice minOccurs="0" maxOccurs="unbounded">
XmlSchemaChoice^ choice = gcnew XmlSchemaChoice();
complexType->Particle = choice;
choice->MinOccurs = 0;
choice->MaxOccursString = "unbounded";
// <xs:element ref="cat"/>
XmlSchemaElement^ catRef = gcnew XmlSchemaElement();
choice->Items->Add(catRef);
catRef->RefName = gcnew XmlQualifiedName("cat");
// <xs:element ref="dog"/>
XmlSchemaElement^ dogRef = gcnew XmlSchemaElement();
choice->Items->Add(dogRef);
dogRef->RefName = gcnew XmlQualifiedName("dog");
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="cat" type="string"/>
XmlSchemaElement elementCat = new XmlSchemaElement();
schema.Items.Add(elementCat);
elementCat.Name = "cat";
elementCat.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");
// <xs:element name="dog" type="string"/>
XmlSchemaElement elementDog = new XmlSchemaElement();
schema.Items.Add(elementDog);
elementDog.Name = "dog";
elementDog.SchemaTypeName = new XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema");
// <xs:element name="redDog" substitutionGroup="dog" />
XmlSchemaElement elementRedDog = new XmlSchemaElement();
schema.Items.Add(elementRedDog);
elementRedDog.Name = "redDog";
elementRedDog.SubstitutionGroup = new XmlQualifiedName("dog");
// <xs:element name="brownDog" substitutionGroup ="dog" />
XmlSchemaElement elementBrownDog = new XmlSchemaElement();
schema.Items.Add(elementBrownDog);
elementBrownDog.Name = "brownDog";
elementBrownDog.SubstitutionGroup = new XmlQualifiedName("dog");
// <xs:element name="pets">
XmlSchemaElement elementPets = new XmlSchemaElement();
schema.Items.Add(elementPets);
elementPets.Name = "pets";
// <xs:complexType>
XmlSchemaComplexType complexType = new XmlSchemaComplexType();
elementPets.SchemaType = complexType;
// <xs:choice minOccurs="0" maxOccurs="unbounded">
XmlSchemaChoice choice = new XmlSchemaChoice();
complexType.Particle = choice;
choice.MinOccurs = 0;
choice.MaxOccursString = "unbounded";
// <xs:element ref="cat"/>
XmlSchemaElement catRef = new XmlSchemaElement();
choice.Items.Add(catRef);
catRef.RefName = new XmlQualifiedName("cat");
// <xs:element ref="dog"/>
XmlSchemaElement dogRef = new XmlSchemaElement();
choice.Items.Add(dogRef);
dogRef.RefName = new XmlQualifiedName("dog");
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:element name="cat" type="string"/>
Dim elementCat As New XmlSchemaElement()
schema.Items.Add(elementCat)
elementCat.Name = "cat"
elementCat.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema")
' <xs:element name="dog" type="string"/>
Dim elementDog As New XmlSchemaElement()
schema.Items.Add(elementDog)
elementDog.Name = "dog"
elementDog.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema")
' <xs:element name="redDog" substitutionGroup="dog" />
Dim elementRedDog As New XmlSchemaElement()
schema.Items.Add(elementRedDog)
elementRedDog.Name = "redDog"
elementRedDog.SubstitutionGroup = New XmlQualifiedName("dog")
' <xs:element name="brownDog" substitutionGroup ="dog" />
Dim elementBrownDog As New XmlSchemaElement()
schema.Items.Add(elementBrownDog)
elementBrownDog.Name = "brownDog"
elementBrownDog.SubstitutionGroup = New XmlQualifiedName("dog")
' <xs:element name="pets">
Dim elementPets As New XmlSchemaElement()
schema.Items.Add(elementPets)
elementPets.Name = "pets"
' <xs:complexType>
Dim complexType As New XmlSchemaComplexType()
elementPets.SchemaType = complexType
' <xs:choice minOccurs="0" maxOccurs="unbounded">
Dim choice As New XmlSchemaChoice()
complexType.Particle = choice
choice.MinOccurs = 0
choice.MaxOccursString = "unbounded"
' <xs:element ref="cat"/>
Dim catRef As New XmlSchemaElement()
choice.Items.Add(catRef)
catRef.RefName = New XmlQualifiedName("cat")
' <xs:element ref="dog"/>
Dim dogRef As New XmlSchemaElement()
choice.Items.Add(dogRef)
dogRef.RefName = New XmlQualifiedName("dog")
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 used for the preceding code example.
<?xml version="1.0" encoding="IBM437"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="cat" type="xs:string"/>
<xs:element name="dog" type="xs:string"/>
<xs:element name="redDog" substitutionGroup="dog" />
<xs:element name="brownDog" substitutionGroup ="dog" />
<xs:element name="pets">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element ref="cat"/>
<xs:element ref="dog"/>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:schema>
חשוב
- Do not use schemas from unknown or untrusted sources or locations. Doing so will compromise the security of your code.
- XML schemas (including inline schemas) are inherently vulnerable to denial of service attacks; do not accept them in untrusted scenarios.
- Schema validation error messages and exceptions may expose sensitive information about the content model or URI paths to the schema file. Be careful not to expose this information to untrusted callers.
Xml |
Initializes a new instance of the XmlSchemaElement class. |
Annotation |
Gets or sets the |
Block |
Gets or sets a |
Block |
Gets the post-compilation value of the |
Constraints |
Gets the collection of constraints on the element. |
Default |
Gets or sets the default value of the element if its content is a simple type or content of the element is |
Element |
Gets an XmlSchemaType object representing the type of the element based on the SchemaType or SchemaTypeName values of the element. |
Element |
Obsolete.
Obsolete.
Obsolete.
Gets a common language runtime (CLR) object based on the XmlSchemaElement or XmlSchemaElement of the element, which holds the post-compilation value of the |
Final |
Gets or sets the |
Final |
Gets the post-compilation value of the |
Fixed |
Gets or sets the fixed value. |
Form |
Gets or sets the form for the element. |
Id |
Gets or sets the string id. (Inherited from XmlSchemaAnnotated) |
Is |
Gets or sets information to indicate if the element can be used in an instance document. |
Is |
Gets or sets information that indicates if |
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) |
Name |
Gets or sets the name of the element. |
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) |
Qualified |
Gets the actual qualified name for the given element. |
Ref |
Gets or sets the reference name of an element declared in this schema (or another schema indicated by the specified namespace). |
Schema |
Gets or sets the type of the element. This can either be a complex type or a simple type. |
Schema |
Gets or sets the name of a built-in data type defined in this schema or another schema indicated by the specified namespace. |
Source |
Gets or sets the source location for the file that loaded the schema. (Inherited from XmlSchemaObject) |
Substitution |
Gets or sets the name of an element that is being substituted by this element. |
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) |
מוצר | גירסאות |
---|---|
.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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