XmlElementAttribute.Type 屬性

定義

命名空間:

System.Xml.Serialization

組件:

System.Xml.XmlSerializer.dll

組件:

System.Xml.ReaderWriter.dll

組件:

System.Xml.dll

組件:

netstandard.dll

取得或設定用來表示 XML 項目的物件類型。

public:
 property Type ^ Type { Type ^ get(); void set(Type ^ value); };

public Type Type { get; set; }

public Type? Type { get; set; }

member this.Type : Type with get, set

Public Property Type As Type

屬性值

Type

成員的 Type。

範例

下列範例會 Type 使用 屬性來指定 的衍生物件 XmlElementAttribute 。 此範例也會將 的 XmlElementAttribute 三個實例套用至傳回 的 ArrayList 欄位。 每個實例都會指定欄位中允許的類型。

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

using namespace System;
using namespace System::Collections;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Serialization;
public ref class Employee
{
public:
   String^ Name;
};

public ref class Manager: public Employee
{
public:
   int Level;
};

public ref class Group
{
public:

   [XmlElement(Manager::typeid)]
   array<Employee^>^Staff;

   [XmlElement(Int32::typeid),
   XmlElement(String::typeid),
   XmlElement(DateTime::typeid)]
   ArrayList^ ExtraInfo;
};

void SerializeObject( String^ filename )
{
   // Create an XmlSerializer instance.
   XmlSerializer^ xSer = gcnew XmlSerializer( Group::typeid );

   // Create object and serialize it.
   Group^ myGroup = gcnew Group;
   Manager^ e1 = gcnew Manager;
   e1->Name = "Manager1";
   Manager^ m1 = gcnew Manager;
   m1->Name = "Manager2";
   m1->Level = 4;
   array<Employee^>^emps = {e1,m1};
   myGroup->Staff = emps;
   myGroup->ExtraInfo = gcnew ArrayList;
   myGroup->ExtraInfo->Add( ".NET" );
   myGroup->ExtraInfo->Add( 42 );
   myGroup->ExtraInfo->Add( DateTime(2001,1,1) );
   TextWriter^ writer = gcnew StreamWriter( filename );
   xSer->Serialize( writer, myGroup );
   writer->Close();
}

int main()
{
   SerializeObject( "TypeEx.xml" );
}

using System;
using System.Collections;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

public class Group
{
   [XmlElement(typeof(Manager))]
   public Employee [] Staff;

   [XmlElement (typeof(int)),
   XmlElement (typeof(string)),
   XmlElement (typeof(DateTime))]
   public ArrayList ExtraInfo;
}

public class Employee
{
   public string Name;
}

public class Manager:Employee
{
   public int Level;
}

public class Run
{
   public static void Main()
   {
      Run test = new Run();
      test.SerializeObject("TypeEx.xml");
   }

   public void SerializeObject(string filename)
   {
      // Create an XmlSerializer instance.
      XmlSerializer xSer =
      new XmlSerializer(typeof(Group));

      // Create object and serialize it.
      Group myGroup = new Group();

      Manager e1 = new Manager();
      e1.Name = "Manager1";
      Manager m1 =  new Manager();
      m1.Name = "Manager2";
      m1.Level = 4;

      Employee[] emps = {e1, m1};
      myGroup.Staff = emps;

      myGroup.ExtraInfo = new ArrayList();
      myGroup.ExtraInfo.Add(".NET");
      myGroup.ExtraInfo.Add(42);
      myGroup.ExtraInfo.Add(new DateTime(2001,1,1));

      TextWriter writer = new StreamWriter(filename);
      xSer.Serialize(writer, myGroup);
      writer.Close();
   }
}

Imports System.Collections
Imports System.IO
Imports System.Xml
Imports System.Xml.Serialization


Public Class Group
    <XmlElement(GetType(Manager))> _    
    Public Staff() As Employee
    
    <XmlElement(GetType(Integer)), _
     XmlElement(GetType(String)), _
     XmlElement(GetType(DateTime))> _
    Public ExtraInfo As ArrayList
End Class

Public Class Employee
    Public Name As String
End Class

Public Class Manager
    Inherits Employee
    Public Level As Integer
End Class

Public Class Run
    
    Public Shared Sub Main()
        Dim test As New Run()
        test.SerializeObject("TypeEx.xml")
    End Sub    
    
    Public Sub SerializeObject(filename As String)
        ' Create an XmlSerializer instance.
        Dim xSer As New XmlSerializer(GetType(Group))
        
        ' Create an object and serialize it.
        Dim myGroup As New Group()
        
        Dim e1 As New Manager()
        e1.Name = "Manager1"
        Dim m1 As New Manager()
        m1.Name = "Manager2"
        m1.Level = 4
        
        Dim emps() As Employee = {e1, m1}
        myGroup.Staff = emps
        
        myGroup.ExtraInfo = New ArrayList()
        myGroup.ExtraInfo.Add(".NET")
        myGroup.ExtraInfo.Add(42)
        myGroup.ExtraInfo.Add(New DateTime(2001, 1, 1))
        
        Dim writer As New StreamWriter(filename)
        xSer.Serialize(writer, myGroup)
        writer.Close()
    End Sub
End Class

備註

Type使用 屬性來指定欄位或屬性的衍生類型。

如果欄位或屬性傳 ArrayList 回 ，您可以將 的 XmlElementAttribute 多個實例套用至成員。 針對每個實例，將 Type 屬性設定為可以插入陣列的物件類型。