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XmlSchemaSimpleType Class

Class defines a simple type that determines the information and constraints for the values of attributes or elements with text-only content. Represents the World Wide Web Consortium (W3C) simpleType element.

For a list of all members of this type, see XmlSchemaSimpleType Members.

System.Object
   System.Xml.Schema.XmlSchemaObject
      System.Xml.Schema.XmlSchemaAnnotated
         System.Xml.Schema.XmlSchemaType
            System.Xml.Schema.XmlSchemaSimpleType

[Visual Basic]
Public Class XmlSchemaSimpleType
   Inherits XmlSchemaType
[C#]
public class XmlSchemaSimpleType : XmlSchemaType
[C++]
public __gc class XmlSchemaSimpleType : public XmlSchemaType
[JScript]
public class XmlSchemaSimpleType extends XmlSchemaType

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Remarks

Simple types are defined by deriving them from existing simple types (built-in data types and derived simple types). A simple type cannot contain elements and cannot have attributes.

Example

[Visual Basic, C#, C++] The following example shows the use of the XmlSchemaSimpleType class.

[Visual Basic] 
Option Strict
Option Explicit

Imports System
Imports System.Xml
Imports System.Xml.Schema

Class XMLSchemaExamples
    
    Public Shared Sub Main()
        
        Dim schema As New XmlSchema()
        
        ' <xs:simpleType name="LotteryNumber">
        Dim LotteryNumberType As New XmlSchemaSimpleType()
        LotteryNumberType.Name = "LotteryNumber"
        
        ' <xs:restriction base="xs:int">
        Dim LotteryNumberRestriction As New XmlSchemaSimpleTypeRestriction()
        LotteryNumberRestriction.BaseTypeName = New XmlQualifiedName("int", "http://www.w3.org/2001/XMLSchema")
        
        ' <xs:minInclusive value="1"/>
        Dim minInclusive As New XmlSchemaMinInclusiveFacet()
        minInclusive.Value = "1"
        LotteryNumberRestriction.Facets.Add(minInclusive)
        
        ' <xs:maxInclusive value="99"/>
        Dim maxInclusive As New XmlSchemaMaxInclusiveFacet()
        maxInclusive.Value = "99"
        LotteryNumberRestriction.Facets.Add(maxInclusive)
        
        LotteryNumberType.Content = LotteryNumberRestriction
        schema.Items.Add(LotteryNumberType)
        
        ' <xs:simpleType name="LotteryNumberList">
        Dim LotteryNumberListType As New XmlSchemaSimpleType()
        LotteryNumberListType.Name = "LotteryNumberList"
        
        ' <xs:list itemType="LotteryNumber"/>
        Dim list As New XmlSchemaSimpleTypeList()
        list.ItemTypeName = New XmlQualifiedName("LotteryNumber", "")
        LotteryNumberListType.Content = list
        
        schema.Items.Add(LotteryNumberListType)
        
        ' <xs:simpleType name="LotteryNumbers">
        Dim LotteryNumbersType As New XmlSchemaSimpleType()
        LotteryNumbersType.Name = "LotteryNumbers"
        
        ' <xs:restriction base="LotteryNumberList">
        Dim LotteryNumbersRestriction As New XmlSchemaSimpleTypeRestriction()
        LotteryNumbersRestriction.BaseTypeName = New XmlQualifiedName("LotteryNumberList", "")
        
        ' <xs:length value="5"/>
        Dim length As New XmlSchemaLengthFacet()
        length.Value = "5"
        LotteryNumbersRestriction.Facets.Add(length)
        
        LotteryNumbersType.Content = LotteryNumbersRestriction
        
        schema.Items.Add(LotteryNumbersType)
        
        ' <xs:element name="TodaysLottery" type="LotteryNumbers">
        Dim TodaysLottery As New XmlSchemaElement()
        TodaysLottery.Name = "TodaysLottery"
        TodaysLottery.SchemaTypeName = New XmlQualifiedName("LotteryNumbers", "")
        
        schema.Items.Add(TodaysLottery)
        
    schema.Compile(AddressOf ValidationCallbackOne)
    Dim nsmgr As New XmlNamespaceManager(New NameTable())
    nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema")
    schema.Write(Console.Out, nsmgr)
    End Sub 'Main
    
    
    Public Shared Sub ValidationCallbackOne(sender As Object, args As ValidationEventArgs)

        Console.WriteLine(args.Message)
    End Sub 'ValidationCallbackOne
End Class 'XMLSchemaExamples

[C#] 
using System;
using System.Xml;  
using System.Xml.Schema;

class XMLSchemaExamples {
    public static void Main() {
 
        XmlSchema schema = new XmlSchema();

        // <xs:simpleType name="LotteryNumber">
        XmlSchemaSimpleType LotteryNumberType = new XmlSchemaSimpleType();
        LotteryNumberType.Name = "LotteryNumber";

        // <xs:restriction base="xs:int">
        XmlSchemaSimpleTypeRestriction LotteryNumberRestriction = new XmlSchemaSimpleTypeRestriction();
        LotteryNumberRestriction.BaseTypeName = new XmlQualifiedName("int", "http://www.w3.org/2001/XMLSchema");

        // <xs:minInclusive value="1"/>
        XmlSchemaMinInclusiveFacet minInclusive = new XmlSchemaMinInclusiveFacet();
        minInclusive.Value = "1";
        LotteryNumberRestriction.Facets.Add(minInclusive);

        // <xs:maxInclusive value="99"/>
        XmlSchemaMaxInclusiveFacet maxInclusive = new XmlSchemaMaxInclusiveFacet();
        maxInclusive.Value = "99";
        LotteryNumberRestriction.Facets.Add(maxInclusive);

        LotteryNumberType.Content = LotteryNumberRestriction;
        schema.Items.Add(LotteryNumberType);

        // <xs:simpleType name="LotteryNumberList">
        XmlSchemaSimpleType LotteryNumberListType = new XmlSchemaSimpleType();
        LotteryNumberListType.Name = "LotteryNumberList";

        // <xs:list itemType="LotteryNumber"/>
        XmlSchemaSimpleTypeList list = new XmlSchemaSimpleTypeList();
        list.ItemTypeName = new XmlQualifiedName("LotteryNumber", "");
        LotteryNumberListType.Content = list;

        schema.Items.Add(LotteryNumberListType);

        // <xs:simpleType name="LotteryNumbers">
        XmlSchemaSimpleType LotteryNumbersType = new XmlSchemaSimpleType();
        LotteryNumbersType.Name = "LotteryNumbers";

        // <xs:restriction base="LotteryNumberList">
        XmlSchemaSimpleTypeRestriction LotteryNumbersRestriction = new XmlSchemaSimpleTypeRestriction();
        LotteryNumbersRestriction.BaseTypeName = new XmlQualifiedName("LotteryNumberList", "");
                
        // <xs:length value="5"/>
        XmlSchemaLengthFacet length = new XmlSchemaLengthFacet();
        length.Value = "5";
        LotteryNumbersRestriction.Facets.Add(length);

        LotteryNumbersType.Content = LotteryNumbersRestriction;

        schema.Items.Add(LotteryNumbersType);

        // <xs:element name="TodaysLottery" type="LotteryNumbers">
        XmlSchemaElement TodaysLottery = new XmlSchemaElement();
        TodaysLottery.Name = "TodaysLottery";
        TodaysLottery.SchemaTypeName = new XmlQualifiedName("LotteryNumbers", "");
        
        schema.Items.Add(TodaysLottery);

        schema.Compile(new ValidationEventHandler(ValidationCallbackOne));
     XmlNamespaceManager nsmgr = new XmlNamespaceManager(new NameTable());
        nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema");
        schema.Write(Console.Out, nsmgr);
    }

    public static void ValidationCallbackOne(object sender, ValidationEventArgs args) {

        Console.WriteLine(args.Message);
    }
}

[C++] 
#using <mscorlib.dll>
#using <System.Xml.dll>
using namespace System;
using namespace System::Xml;  
using namespace System::Xml::Schema;

__gc class XMLSchemaExamples {
public:
    static void main() {
 
        XmlSchema* schema = new XmlSchema();

        // <xs:simpleType name="LotteryNumber">
        XmlSchemaSimpleType* LotteryNumberType = new XmlSchemaSimpleType();
        LotteryNumberType->Name = S"LotteryNumber";

        // <xs:restriction base="xs:int">
        XmlSchemaSimpleTypeRestriction* LotteryNumberRestriction = new XmlSchemaSimpleTypeRestriction();
        LotteryNumberRestriction->BaseTypeName = new XmlQualifiedName(S"int", S"http://www.w3.org/2001/XMLSchema");

        // <xs:minInclusive value="1"/>
        XmlSchemaMinInclusiveFacet* minInclusive = new XmlSchemaMinInclusiveFacet();
        minInclusive->Value = S"1";
        LotteryNumberRestriction->Facets->Add(minInclusive);

        // <xs:maxInclusive value="99"/>
        XmlSchemaMaxInclusiveFacet* maxInclusive = new XmlSchemaMaxInclusiveFacet();
        maxInclusive->Value = S"99";
        LotteryNumberRestriction->Facets->Add(maxInclusive);

        LotteryNumberType->Content = LotteryNumberRestriction;
        schema->Items->Add(LotteryNumberType);

        // <xs:simpleType name="LotteryNumberList">
        XmlSchemaSimpleType* LotteryNumberListType = new XmlSchemaSimpleType();
        LotteryNumberListType->Name = S"LotteryNumberList";

        // <xs:list itemType="LotteryNumber"/>
        XmlSchemaSimpleTypeList* list = new XmlSchemaSimpleTypeList();
        list->ItemTypeName = new XmlQualifiedName(S"LotteryNumber", S"");
        LotteryNumberListType->Content = list;

        schema->Items->Add(LotteryNumberListType);

        // <xs:simpleType name="LotteryNumbers">
        XmlSchemaSimpleType* LotteryNumbersType = new XmlSchemaSimpleType();
        LotteryNumbersType->Name = S"LotteryNumbers";

        // <xs:restriction base="LotteryNumberList">
        XmlSchemaSimpleTypeRestriction* LotteryNumbersRestriction = new XmlSchemaSimpleTypeRestriction();
        LotteryNumbersRestriction->BaseTypeName = new XmlQualifiedName(S"LotteryNumberList", S"");
                
        // <xs:length value="5"/>
        XmlSchemaLengthFacet* length = new XmlSchemaLengthFacet();
        length->Value = S"5";
        LotteryNumbersRestriction->Facets->Add(length);

        LotteryNumbersType->Content = LotteryNumbersRestriction;

        schema->Items->Add(LotteryNumbersType);

        // <xs:element name="TodaysLottery" type="LotteryNumbers">
        XmlSchemaElement* TodaysLottery = new XmlSchemaElement();
        TodaysLottery->Name = S"TodaysLottery";
        TodaysLottery->SchemaTypeName = new XmlQualifiedName(S"LotteryNumbers", S"");
        
        schema->Items->Add(TodaysLottery);

        schema->Compile(new ValidationEventHandler(0, ValidationCallbackOne));
     XmlNamespaceManager* nsmgr = new XmlNamespaceManager(new NameTable());
        nsmgr->AddNamespace(S"xs", S"http://www.w3.org/2001/XMLSchema");
        schema->Write(Console::Out,nsmgr);
    }

    static void ValidationCallbackOne(Object* /*sender*/, ValidationEventArgs* args) {

        Console::WriteLine(args->Message);
    }
};

int main()
{
    XMLSchemaExamples::main();
}

[Visual Basic, C#, C++] 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:simpleType name="LotteryNumber">
        <xs:restriction base="xs:int">
            <xs:minInclusive value="1"/>
            <xs:maxInclusive value="99"/>
        </xs:restriction>
    </xs:simpleType>

    <xs:simpleType name="LotteryNumberList">
        <xs:list itemType="LotteryNumber"/>
    </xs:simpleType>
    
    <xs:simpleType name="LotteryNumbers">
        <xs:restriction base="LotteryNumberList">
            <xs:length value="5"/>
        </xs:restriction>
    </xs:simpleType>
    
    <xs:element name="TodaysLottery" type="LotteryNumbers">
    </xs:element>
    
</xs:schema>

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Namespace: System.Xml.Schema

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Assembly: System.Xml (in System.Xml.dll)

See Also

XmlSchemaSimpleType Members | System.Xml.Schema Namespace

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