XmlSchemaObject クラスとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

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XmlSchemaObject クラス

Xml スキーマオブジェクトモデルの階層構造におけるルートクラスを表し、XmlSchema などのクラスの基本クラスとして機能します。

名前空間: System.Xml.Schema
アセンブリ: System.Xml (system.xml.dll 内)
構文

Visual Basic (宣言)

Public MustInherit Class
 XmlSchemaObject

Visual Basic (使用法)

Dim instance As XmlSchemaObject

public abstract class XmlSchemaObject

C++

public ref class XmlSchemaObject abstract

public abstract class XmlSchemaObject

JScript

public abstract class XmlSchemaObject

使用例

各スキーマオブジェクトを表示する例を次に示します。

Visual Basic

Option Strict On
Option Explicit On

Imports System
Imports System.Xml
Imports System.Xml.Schema
Imports System.IO
Imports System.Reflection
Imports Microsoft.VisualBasic

Public Class ValidXSD

    Public Shared Sub Main()

        Dim xsd As String
 = "example.xsd"

        Dim fs As FileStream
        Dim schema As XmlSchema
        Try
            fs = New FileStream(xsd, FileMode.Open)
            schema = XmlSchema.Read(fs, New ValidationEventHandler(AddressOf
 ShowCompileError))

            Dim schemaSet As New
 XmlSchemaSet()
            AddHandler schemaSet.ValidationEventHandler, AddressOf
 ShowCompileError

            schemaSet.Add(schema)
            schemaSet.Compile()

            Dim compiledSchema As XmlSchema
 = Nothing

            For Each schema1 As
 XmlSchema In schemaSet.Schemas()
                compiledSchema = schema1
            Next

            schema = compiledSchema

            If schema.IsCompiled Then
                DisplayObjects(schema)
            End If

        Catch e As XmlSchemaException
            Console.WriteLine("LineNumber = {0}",
 e.LineNumber)
            Console.WriteLine("LinePosition = {0}",
 e.LinePosition)
            Console.WriteLine("Message = {0}", e.Message)
            Console.WriteLine("Source = {0}", e.Source)

        End Try
    End Sub 'Main


    Private Overloads Shared
 Sub DisplayObjects(ByVal o As
 Object)
        DisplayObjects(o, "")
    End Sub 'DisplayObjects

    Private Overloads Shared
 Sub DisplayObjects(ByVal o As
 Object, ByVal indent As String)
        Console.WriteLine("{0}{1}", indent, o)

        Dim property1 As PropertyInfo
        For Each property1 In
 o.GetType().GetProperties()
            If property1.PropertyType.FullName = "System.Xml.Schema.XmlSchemaObjectCollection"
 Then

                Dim childObjectCollection As
 XmlSchemaObjectCollection = CType(property1.GetValue(o, Nothing),
 XmlSchemaObjectCollection)

                Dim schemaObject As XmlSchemaObject
                For Each schemaObject In
 childObjectCollection
                    DisplayObjects(schemaObject, indent + ControlChars.Tab)
                Next schemaObject
            End If
        Next property1
    End Sub 'DisplayObjects

    Private Shared Sub ShowCompileError(ByVal
 sender As Object, ByVal
 e As ValidationEventArgs)
        Console.WriteLine("Validation Error: {0}",
 e.Message)
    End Sub 'ShowCompileError
End Class 'ValidXSD

using System;
using System.Xml;
using System.Xml.Schema;
using System.IO;
using System.Reflection;

public class ValidXSD
{
    public static int Main()
    {

        string xsd = "example.xsd";

        FileStream fs;
        XmlSchema schema;
        try
        {
            fs = new FileStream(xsd, FileMode.Open);
            schema = XmlSchema.Read(fs, new ValidationEventHandler(ShowCompileError));

            XmlSchemaSet schemaSet = new XmlSchemaSet();
            schemaSet.ValidationEventHandler += new ValidationEventHandler(ShowCompileError);
            schemaSet.Add(schema);
            schemaSet.Compile();

            XmlSchema compiledSchema = null;

            foreach (XmlSchema schema1 in schemaSet.Schemas())
            {
                compiledSchema = schema1;
            }

            schema = compiledSchema;

            if (schema.IsCompiled)
            {
                DisplayObjects(schema);
            }
            return 0;
        }
        catch (XmlSchemaException e)
        {
            Console.WriteLine("LineNumber = {0}", e.LineNumber);
            Console.WriteLine("LinePosition = {0}", e.LinePosition);
            Console.WriteLine("Message = {0}", e.Message);
            Console.WriteLine("Source = {0}", e.Source);
            return -1;
        }
    }

    private static void
 DisplayObjects(object o)
    {
        DisplayObjects(o, "");
    }
    private static void
 DisplayObjects(object o, string indent)
    {
        Console.WriteLine("{0}{1}", indent, o);

        foreach (PropertyInfo property in o.GetType().GetProperties())
        {
            if (property.PropertyType.FullName == "System.Xml.Schema.XmlSchemaObjectCollection")
            {

                XmlSchemaObjectCollection childObjectCollection = (XmlSchemaObjectCollection)property.GetValue(o,
 null);

                foreach (XmlSchemaObject schemaObject in
 childObjectCollection)
                {
                    DisplayObjects(schemaObject, indent + "\t");
                }
            }
        }
    }
    private static void
 ShowCompileError(object sender, ValidationEventArgs e)
    {
        Console.WriteLine("Validation Error: {0}", e.Message);
    }
}

この例では、入力として、example.xsd というファイルを使用しています。

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:group name="testGroup">
  <xs:choice>
    <xs:any namespace="##any"/>
  </xs:choice>
  </xs:group>
  <xs:element name="myElement"
 >
  <xs:complexType>
    <xs:choice maxOccurs="unbounded">
      <xs:group ref="testGroup"
 />
    </xs:choice>
  </xs:complexType>
  </xs:element>
</xs:schema>