XmlAttributes.Xmlns XmlAttributes.Xmlns XmlAttributes.Xmlns XmlAttributes.Xmlns Property

Definition

Ruft einen Wert ab, der angibt, ob alle Namespacedeklarationen beibehalten werden sollen, wenn ein Objekt überschrieben wird, das einen Member enthält, der ein XmlSerializerNamespaces-Objekt zurückgibt, oder legt diesen fest.Gets or sets a value that specifies whether to keep all namespace declarations when an object containing a member that returns an XmlSerializerNamespaces object is overridden.

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

Eigenschaftswert

true, wenn die Namespacedeklarationen beibehalten werden sollen, andernfalls false.true if the namespace declarations should be kept; otherwise, false.

Beispiele

Das folgende Beispiel enthält eine Klasse mit Studentdem Namen.The following example contains a class named Student. Die-Klasse enthält einen Member MyNamespaces mit dem Namen XmlSerializerNamespaces , der ein Objekt zurückgibt.The class contains a member named MyNamespaces that returns an XmlSerializerNamespaces object. Im Beispiel wird ein XmlAttributes -Objekt erstellt, das einer Instanz XmlAttributeOverrides der-Klasse hinzugefügt wird.The example creates an XmlAttributes object that is added to an instance of the XmlAttributeOverrides class. Die Xmlns -Eigenschaft ist auf truefestgelegt, wodurch der XmlSerializer angewiesen wird, die Student Namespaces beizubehalten, wenn die Serialisierung des Objekts überschrieben wird.The Xmlns property is set to true, which instructs the XmlSerializer to preserve the namespaces when the serialization of the Student object is overridden.

#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 'Student
 

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 

Gilt für: