XmlAttributes.Xmlns Proprietà

Riferimento

Definizione

Spazio dei nomi:: System.Xml.Serialization

Assembly:: System.Xml.XmlSerializer.dll

Assembly:: System.Xml.dll

Assembly:: netstandard.dll

Importante

Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.

Ottiene o imposta un valore che specifica se mantenere tutte le dichiarazioni degli spazi dei nomi quando un oggetto contenente un membro che restituisce un oggetto XmlSerializerNamespaces viene sottoposto a override.

public:
 property bool Xmlns { bool get(); void set(bool value); };

public bool Xmlns { get; set; }

member this.Xmlns : bool with get, set

Public Property Xmlns As Boolean

Valore della proprietà

Boolean

true se le dichiarazioni degli spazi dei nomi devono essere mantenute; in caso contrario false.

Esempio

L'esempio seguente contiene una classe denominata Student. La classe contiene un membro denominato MyNamespaces che restituisce un XmlSerializerNamespaces oggetto . Nell'esempio viene creato un XmlAttributes oggetto aggiunto a un'istanza della XmlAttributeOverrides classe . La Xmlns proprietà è impostata su true, che indica XmlSerializer a di mantenere gli spazi dei nomi quando viene eseguito l'override della serializzazione dell'oggetto Student .

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

using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Serialization;
public ref class Student
{
public:

   [XmlAttributeAttribute]
   String^ Name;

   [XmlNamespaceDeclarationsAttribute]
   XmlSerializerNamespaces^ myNamespaces;
};

void SerializeStudent( String^ filename );
void DeserializeStudent( String^ filename );
int main()
{
   SerializeStudent( "Student.xml" );
   DeserializeStudent( "Student.xml" );
}

void SerializeStudent( String^ filename )
{
   XmlAttributes^ atts = gcnew XmlAttributes;

   // Set to true to preserve namespaces, 
   // or false to ignore them.
   atts->Xmlns = true;
   XmlAttributeOverrides^ xover = gcnew XmlAttributeOverrides;

   // Add the XmlAttributes and specify the name of the element 
   // containing namespaces.
   xover->Add( Student::typeid, "myNamespaces", atts );

   // Create the XmlSerializer using the 
   // XmlAttributeOverrides object.
   XmlSerializer^ xser = gcnew XmlSerializer( Student::typeid,xover );
   Student^ myStudent = gcnew Student;
   XmlSerializerNamespaces^ ns = gcnew XmlSerializerNamespaces;
   ns->Add( "myns1", "http://www.cpandl.com" );
   ns->Add( "myns2", "http://www.cohowinery.com" );
   myStudent->myNamespaces = ns;
   myStudent->Name = "Student1";
   FileStream^ fs = gcnew FileStream( filename,FileMode::Create );
   xser->Serialize( fs, myStudent );
   fs->Close();
}

void DeserializeStudent( String^ filename )
{
   XmlAttributes^ atts = gcnew XmlAttributes;

   // Set to true to preserve namespaces, or false to ignore them.
   atts->Xmlns = true;
   XmlAttributeOverrides^ xover = gcnew XmlAttributeOverrides;

   // Add the XmlAttributes and specify the name of the 
   // element containing namespaces.
   xover->Add( Student::typeid, "myNamespaces", atts );

   // Create the XmlSerializer using the 
   // XmlAttributeOverrides object.
   XmlSerializer^ xser = gcnew XmlSerializer( Student::typeid,xover );
   FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
   Student^ myStudent;
   myStudent = safe_cast<Student^>(xser->Deserialize( fs ));
   fs->Close();

   // Use the ToArray method to get an array of 
   // XmlQualifiedName objects.
   array<XmlQualifiedName^>^qNames = myStudent->myNamespaces->ToArray();
   for ( int i = 0; i < qNames->Length; i++ )
   {
      Console::WriteLine( "{0}:{1}", qNames[ i ]->Name, qNames[ i ]->Namespace );

   }
}

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

public class Student
{
    [XmlAttributeAttribute]
    public string Name;

    [XmlNamespaceDeclarationsAttribute]
    public XmlSerializerNamespaces myNamespaces;
}
    
public class Run
{
    public static void Main()
    {
        Run test = new Run();
        test.SerializeStudent("Student.xml");
        test.DeserializeStudent("Student.xml");
    }

    public void SerializeStudent(string filename)
    {
        XmlAttributes atts = new XmlAttributes();
        // Set to true to preserve namespaces, 
    // or false to ignore them.
        atts.Xmlns=true;

        XmlAttributeOverrides xover = new XmlAttributeOverrides();
        // Add the XmlAttributes and specify the name of the element 
    // containing namespaces.
        xover.Add(typeof(Student),"myNamespaces", atts);
        // Create the XmlSerializer using the 
        // XmlAttributeOverrides object.
        XmlSerializer xser = new XmlSerializer(typeof (Student),xover);

        Student myStudent = new Student();
        XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
        ns.Add("myns1", "http://www.cpandl.com");
        ns.Add("myns2", "http://www.cohowinery.com");
        myStudent.myNamespaces= ns;
        myStudent.Name= "Student1";

        FileStream fs = new FileStream(filename,FileMode.Create);

        xser.Serialize(fs,myStudent);
        fs.Close();
    }

    private void DeserializeStudent(string filename)
    {
        XmlAttributes atts = new XmlAttributes();
        // Set to true to preserve namespaces, or false to ignore them.
        atts.Xmlns=true;

        XmlAttributeOverrides xover = new XmlAttributeOverrides();
        // Add the XmlAttributes and specify the name of the 
        // element containing namespaces.
        xover.Add(typeof(Student),"myNamespaces", atts);

        // Create the XmlSerializer using the 
        // XmlAttributeOverrides object.
        XmlSerializer xser = 
        new XmlSerializer(typeof (Student),xover);

        FileStream fs = new FileStream(filename,FileMode.Open);

        Student myStudent;
        myStudent= (Student) xser.Deserialize(fs);
        fs.Close();

        // Use the ToArray method to get an array of 
        // XmlQualifiedName objects.
        XmlQualifiedName[] qNames= myStudent.myNamespaces.ToArray();
        for(int i = 0; i < qNames.Length;i++)
        {
            Console.WriteLine("{0}:{1}", 
        qNames[i].Name,qNames[i].Namespace);
        }
    }
}

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

 
Public Class Student
   <XmlAttributeAttribute()> _
   Public Name As String

   <XmlNamespaceDeclarationsAttribute()> _   
   Public myNamespaces As XmlSerializerNamespaces
End Class
 

Public Class Run
   
   Public Shared Sub Main()
      Dim test As New Run()
      test.SerializeStudent("Student_v.xml")
      test.DeserializeStudent("Student_v.xml")
   End Sub 
   
   
   Public Sub SerializeStudent(filename As String)
      Dim atts As New XmlAttributes()
      ' Set to true to preserve namespaces, or false to ignore them.
      atts.Xmlns = True
      
      Dim xover As New XmlAttributeOverrides()
      ' Add the XmlAttributes and specify the name of 
      ' the element containing namespaces.
      xover.Add(GetType(Student), "myNamespaces", atts)
      ' Create the XmlSerializer using the 
      ' XmlAttributeOverrides object.
      Dim xser As New XmlSerializer(GetType(Student), xover)
      
      Dim myStudent As New Student()
      Dim ns As New XmlSerializerNamespaces()
      ns.Add("myns1", "http://www.cpandl.com")
      ns.Add("myns2", "http://www.cohowinery.com")
      myStudent.myNamespaces = ns
      myStudent.Name = "Student1"
      
      Dim fs As New FileStream(filename, FileMode.Create)
      
      xser.Serialize(fs, myStudent)
      fs.Close()
   End Sub 
       
   Private Sub DeserializeStudent(filename As String)
      Dim atts As New XmlAttributes()
      ' Set to true to preserve namespaces, or false to ignore them.
      atts.Xmlns = True
      
      Dim xover As New XmlAttributeOverrides()
      ' Add the XmlAttributes and specify the name 
      ' of the element containing namespaces.
      xover.Add(GetType(Student), "myNamespaces", atts)
      
      ' Create the XmlSerializer using the 
      ' XmlAttributeOverrides object.
      Dim xser As New XmlSerializer(GetType(Student), xover)
      
      Dim fs As New FileStream(filename, FileMode.Open)
      
      Dim myStudent As Student
      myStudent = CType(xser.Deserialize(fs), Student)
      fs.Close()
      
      ' Use the ToArray method to get an array 
      ' of XmlQualifiedName objects.
      Dim qNames As XmlQualifiedName() = _
           myStudent.myNamespaces.ToArray()
      Dim i As Integer
      For i = 0 To qNames.Length - 1
         Console.WriteLine("{0}:{1}", _
              qNames(i).Name, qNames(i).Namespace)
      Next i
   End Sub 
End Class

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XmlAttributes.Xmlns Proprietà

Definizione

Valore della proprietà

Esempio

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