XmlAttributes.XmlAttribute プロパティ

定義

XmlSerializer が、パブリック フィールドまたはパブリックな読み取り/書き込みプロパティを XML 属性としてシリアル化する方法を指定するオブジェクトを取得または設定します。Gets or sets an object that specifies how the XmlSerializer serializes a public field or public read/write property as an XML attribute.

public:
 property System::Xml::Serialization::XmlAttributeAttribute ^ XmlAttribute { System::Xml::Serialization::XmlAttributeAttribute ^ get(); void set(System::Xml::Serialization::XmlAttributeAttribute ^ value); };
public System.Xml.Serialization.XmlAttributeAttribute XmlAttribute { get; set; }
member this.XmlAttribute : System.Xml.Serialization.XmlAttributeAttribute with get, set
Public Property XmlAttribute As XmlAttributeAttribute

プロパティ値

パブリック フィールドまたは読み取り/書き込みプロパティを XML 属性としてシリアル化する方法を制御する XmlAttributeAttributeAn XmlAttributeAttribute that controls the serialization of a public field or read/write property as an XML attribute.

次の例では、GroupNameという名前のプロパティを含む Group という名前のクラスをシリアル化します。GroupName プロパティは、XML 属性としてシリアル化されます。The following example serializes a class named Group that contains a property named GroupName; the GroupName property is serialized as an XML attribute. この例では、XmlAttributeOverrides を作成し、フィールドの既定のシリアル化をオーバーライドする XmlAttributes オブジェクトを作成します。The example creates an XmlAttributeOverrides and an XmlAttributes object to override the default serialization of the field. 次に、プロパティを明示的にオーバーライドする XmlAttributeAttribute を作成し、オブジェクトを XmlAttribute プロパティに設定します。 XmlAttributes オブジェクトは、指定されたオーバーライドされるメンバーの名前を使用して XmlAttributeOverrides オブジェクトに追加されます。The example then creates an XmlAttributeAttribute to specifically override the property, and the object is set to the XmlAttribute property The XmlAttributes object is added to the XmlAttributeOverrides object with the name of the overridden member specified. 最後に、XmlAttributeOverrides オブジェクトを使用して XmlSerializer が構築され、返されます。Finally, an XmlSerializer is constructed and returned using the XmlAttributeOverrides object.

#using <System.Xml.dll>
#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Serialization;

// This is the class that will be serialized.
public ref class Group
{
public:

   // This is the attribute that will be overridden.

   [XmlAttributeAttribute]
   String^ GroupName;
   int GroupNumber;
};

// Return an XmlSerializer used for overriding. 
XmlSerializer^ CreateOverrider()
{
   // Create the XmlAttributeOverrides and XmlAttributes objects.
   XmlAttributeOverrides^ xOver = gcnew XmlAttributeOverrides;
   XmlAttributes^ xAttrs = gcnew XmlAttributes;

   /* Create an overriding XmlAttributeAttribute set it to 
      the XmlAttribute property of the XmlAttributes object.*/
   XmlAttributeAttribute^ xAttribute = gcnew XmlAttributeAttribute( "SplinterName" );
   xAttrs->XmlAttribute = xAttribute;

   // Add to the XmlAttributeOverrides. Specify the member name.
   xOver->Add( Group::typeid, "GroupName", xAttrs );

   // Create the XmlSerializer and return it.
   return gcnew XmlSerializer( Group::typeid,xOver );
}

void SerializeObject( String^ filename )
{
   // Create an instance of the XmlSerializer class.
   XmlSerializer^ mySerializer = CreateOverrider();

   // Writing the file requires a TextWriter.
   TextWriter^ writer = gcnew StreamWriter( filename );

   // Create an instance of the class that will be serialized.
   Group^ myGroup = gcnew Group;

   /* Set the Name property, which will be generated 
      as an XML attribute. */
   myGroup->GroupName = ".NET";
   myGroup->GroupNumber = 1;

   // Serialize the class, and close the TextWriter.
   mySerializer->Serialize( writer, myGroup );
   writer->Close();
}

void DeserializeObject( String^ filename )
{
   XmlSerializer^ mySerializer = CreateOverrider();
   FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
   Group^ myGroup = dynamic_cast<Group^>(mySerializer->Deserialize( fs ));
   Console::WriteLine( myGroup->GroupName );
   Console::WriteLine( myGroup->GroupNumber );
}

int main()
{
   SerializeObject( "OverrideAttribute.xml" );
   DeserializeObject( "OverrideAttribute.xml" );
}
using System;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

// This is the class that will be serialized.
public class Group
{
   // This is the attribute that will be overridden.
   [XmlAttribute]
   public string GroupName;
   public int GroupNumber;
}
 
public class Run
{
   public static void Main()
   {
      Run test = new Run();
      test.SerializeObject("OverrideAttribute.xml");
      test.DeserializeObject("OverrideAttribute.xml");
   }
   // Return an XmlSerializer used for overriding. 
   public XmlSerializer CreateOverrider()
   {
      // Create the XmlAttributeOverrides and XmlAttributes objects.
      XmlAttributeOverrides xOver = new XmlAttributeOverrides();
      XmlAttributes xAttrs = new XmlAttributes();

      /* Create an overriding XmlAttributeAttribute set it to 
      the XmlAttribute property of the XmlAttributes object.*/
      XmlAttributeAttribute xAttribute = new XmlAttributeAttribute("SplinterName");
      xAttrs.XmlAttribute = xAttribute;

      // Add to the XmlAttributeOverrides. Specify the member name.
      xOver.Add(typeof(Group), "GroupName", xAttrs);

      // Create the XmlSerializer and return it.
      return new XmlSerializer(typeof(Group), xOver);
   }
 
   public void SerializeObject(string filename)
   {
      // Create an instance of the XmlSerializer class.
      XmlSerializer mySerializer =  CreateOverrider();
      // Writing the file requires a TextWriter.
      TextWriter writer = new StreamWriter(filename);

      // Create an instance of the class that will be serialized.
      Group myGroup = new Group();

      /* Set the Name property, which will be generated 
      as an XML attribute. */
      myGroup.GroupName = ".NET";
      myGroup.GroupNumber = 1;
      // Serialize the class, and close the TextWriter.
      mySerializer.Serialize(writer, myGroup);
       writer.Close();
   }

   public void DeserializeObject(string filename)
   {
      XmlSerializer mySerializer = CreateOverrider();
      FileStream fs = new FileStream(filename, FileMode.Open);
      Group myGroup = (Group) 
      mySerializer.Deserialize(fs);
      
      Console.WriteLine(myGroup.GroupName);
      Console.WriteLine(myGroup.GroupNumber);
   }
}
   
Imports System.IO
Imports System.Xml
Imports System.Xml.Serialization


' This is the class that will be serialized.
Public Class Group
    ' This is the attribute that will be overridden.
    <XmlAttribute()> Public GroupName As String
    Public GroupNumber As Integer
End Class


Public Class Run
    
    Public Shared Sub Main()
        Dim test As New Run()
        test.SerializeObject("OverrideAttribute.xml")
        test.DeserializeObject("OverrideAttribute.xml")
    End Sub
    
    ' Return an XmlSerializer used for overriding. 
    Public Function CreateOverrider() As XmlSerializer
        ' Create the XmlAttributeOverrides and XmlAttributes objects.
        Dim xOver As New XmlAttributeOverrides()
        Dim xAttrs As New XmlAttributes()
        
        ' Create an overriding XmlAttributeAttribute set it to
        ' the XmlAttribute property of the XmlAttributes object.
        Dim xAttribute As New XmlAttributeAttribute("SplinterName")
        xAttrs.XmlAttribute = xAttribute
        
        ' Add to the XmlAttributeOverrides. Specify the member name.
        xOver.Add(GetType(Group), "GroupName", xAttrs)
        
        ' Create the XmlSerializer and return it.
        Return New XmlSerializer(GetType(Group), xOver)
    End Function 'CreateOverrider
    
    
    Public Sub SerializeObject(ByVal filename As String)
        ' Create an instance of the XmlSerializer class.
        Dim mySerializer As XmlSerializer = CreateOverrider()
        ' Writing the file requires a TextWriter.
        Dim writer As New StreamWriter(filename)
        
        ' Create an instance of the class that will be serialized.
        Dim myGroup As New Group()
        
        ' Set the Name property, which will be generated
        ' as an XML attribute. 
        myGroup.GroupName = ".NET"
        myGroup.GroupNumber = 1
        ' Serialize the class, and close the TextWriter.
        mySerializer.Serialize(writer, myGroup)
        writer.Close()
    End Sub
    
    
    Public Sub DeserializeObject(ByVal filename As String)
        Dim mySerializer As XmlSerializer = CreateOverrider()
        Dim fs As New FileStream(filename, FileMode.Open)
        Dim myGroup As Group = CType(mySerializer.Deserialize(fs), Group)

        Console.WriteLine(myGroup.GroupName)
        Console.WriteLine(myGroup.GroupNumber)
    End Sub
End Class

注釈

既定では、パブリックフィールドまたはパブリックの読み取り/書き込みプロパティに属性が適用されていない場合は、XML 要素としてシリアル化されます。By default, if no attribute is applied to a public field or public read/write property, it is serialized as an XML element. フィールドまたはプロパティに XmlAttributeAttribute を適用することによって、XML 属性を生成するように XmlSerializer に指示することもできます。You can also instruct the XmlSerializer to generate an XML attribute by applying an XmlAttributeAttribute to the field or property.

XmlAttribute プロパティを使用すると、既定のシリアル化と、メンバーに XmlAttributeAttribute を適用することによって制御されるシリアル化をオーバーライドできます。The XmlAttribute property allows you to override the default serialization, as well as the serialization controlled by applying an XmlAttributeAttribute to the member. これを行うには、XmlAttributeAttribute を作成し、そのプロパティ (AttributeNameなど) を設定します。To do this, create an XmlAttributeAttribute and set its properties (such as AttributeName). 新しいオブジェクトを XmlAttributes オブジェクトの XmlAttribute プロパティに割り当てます。Assign the new object to the XmlAttribute property of an XmlAttributes object. XmlAttributes オブジェクトを XmlAttributeOverrides オブジェクトに追加し、フィールドまたはプロパティを含むオブジェクトの型、およびフィールドまたはプロパティの名前を指定します。Add the XmlAttributes object to an XmlAttributeOverrides object and specify the type of the object that contains the field or property, and the name of the field or property. 最後に、XmlAttributeOverrides オブジェクトを使用して XmlSerializer を作成し、Serialize または Deserialize メソッドを呼び出します。Lastly, create an XmlSerializer using the XmlAttributeOverrides object and call the Serialize or Deserialize method.

適用対象