Export (0) Print
Expand All

XmlAttributes::Xmlns Property

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.

Namespace:  System.Xml.Serialization
Assembly:  System.Xml (in System.Xml.dll)

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

Property Value

Type: System::Boolean
true if the namespace declarations should be kept; otherwise, false.

The following example contains a class named Student. The class contains a member named MyNamespaces that returns an XmlSerializerNamespaces object. The example creates an XmlAttributes object that is added to an instance of the XmlAttributeOverrides class. 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 );

   }
}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Show:
© 2014 Microsoft