XmlAnyElementAttributes Class
Represents a collection of XmlAnyElementAttribute objects.
Assembly: System.Xml (in System.Xml.dll)
Use the XmlAnyElementAttributes to override the behavior of a set of XmlAnyElementAttribute objects. Multiple instances of the XmlAnyElementAttribute class can be applied to a class member, as long as each instance has a distinct Name property value; this instructs the XmlSerializer to collect unknown elements under the named element into the appropriate array. It is for this reason that multiple instances of the XmlAnyElementAttribute class can be added to the XmlAnyElementAttributes.
To override a set of XmlAnyElementAttribute objects:
Create an XmlAnyElementAttributes.
Create the set of XmlAnyElementAttribute objects, and add each object to the collection using the Add method.
Create an XmlAttributes.
Set the XmlAnyElements property to the XmlAnyElementAttributes.
Create an XmlAttributeOverrides.
Add the XmlAttributes to the XmlAttributeOverrides using the Add method.
Create an instance of the XmlSerializer using the XmlAttributeOverrides.
Serialize or deserialize an object that contains the set of XmlAnyElementAttribute objects.
The following example creates a new XmlAnyElementAttribute and adds it to the collection of objects accessed through the XmlAnyElements property. The XmlAttributes is then added to a XmlAttributeOverrides which is used to create an XmlSerializer. The XmlSerializer is used to serialize or deserialize an object. To see the effect of using the XmlAnyElementAttributes property, create an XML document named UnknownElements.xml by running the SerializeObject method in the Main method. Edit the resulting document to include other (unknown) elements. Comment out the SerializeObject call in the Main method, and uncomment the call to the DeserializeObject method, which prints out the name and value of any unknown XML element.
Imports System Imports System.IO Imports System.Xml.Serialization Imports System.Xml Public Class Group Public GroupName As String <XmlAnyElement> _ Public Things () As object End Class Public Class Test Shared Sub Main() Dim t As Test = New Test() ' 1 Run this and create the XML document. ' 2 Add New elements to the XML document. ' 3 Comment out the New line, and uncomment ' the DeserializeObject line to deserialize the ' XML document and see unknown elements. t.SerializeObject("UnknownElements.xml") 't.DeserializeObject("UnknownElements.xml") End Sub Private Sub SerializeObject(filename As String) Dim ser As XmlSerializer = New XmlSerializer(GetType (Group)) Dim writer As TextWriter = New StreamWriter(filename) Dim g As Group = New Group() g.GroupName = "MyGroup" ser.Serialize(writer, g) writer.Close() End Sub Private Sub DeserializeObject(filename As String) Dim ser As XmlSerializer = CreateOverrideSerializer() ' A FileStream is needed to read the XML document. Dim fs As FileStream = New FileStream(filename, FileMode.Open) Dim g As Group = CType( _ ser.Deserialize(fs), Group) fs.Close() Console.WriteLine(g.GroupName) Console.WriteLine(g.Things.Length) Dim xelement As XmlELement for each xelement in g.Things Console.WriteLine(xelement.Name &": " & xelement.InnerXml) next End Sub Private Function CreateOverrideSerializer() As XmlSerializer Dim myAnyElement As XmlAnyElementAttribute = _ New XmlAnyElementAttribute() Dim xOverride As XmlAttributeOverrides = _ New XmlAttributeOverrides() Dim xAtts As XmlAttributes = New XmlAttributes() xAtts.XmlAnyElements.Add(myAnyElement) xOverride.Add(GetType(Group), "Things", xAtts) return New XmlSerializer(GetType(Group) , xOverride) End Function End Class
#using <mscorlib.dll>
#using <System.dll>
#using <System.xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml::Serialization;
using namespace System::Xml;
public __gc class Group
{
public:
String* GroupName;
[XmlAnyElement]
Object* Things[];
};
void SerializeObject(String* filename);
void DeserializeObject(String* filename);
XmlSerializer* CreateOverrideSerializer();
int main()
{
// 1 Run this and create the XML document.
// 2 Add new elements to the XML document.
// 3 Comment out the next line, and uncomment
// the DeserializeObject line to deserialize the
// XML document and see unknown elements.
SerializeObject(S"UnknownElements.xml");
// DeserializeObject(S"UnknownElements.xml");
}
void SerializeObject(String* filename)
{
XmlSerializer* ser = new XmlSerializer( __typeof(Group));
TextWriter* writer = new StreamWriter(filename);
Group* g = new Group();
g->GroupName = S"MyGroup";
ser->Serialize(writer, g);
writer->Close();
}
void DeserializeObject(String* filename)
{
XmlSerializer* ser = CreateOverrideSerializer();
// A FileStream is needed to read the XML document.
FileStream* fs = new FileStream(filename, FileMode::Open);
Group* g = __try_cast<Group*>( ser->Deserialize(fs ));
fs->Close();
Console::WriteLine(g->GroupName);
Console::WriteLine(g->Things->Length);
for ( int i = 0; i < g->Things->Length; ++i )
{
XmlElement* xelement = __try_cast<XmlElement*>( g->Things[i] );
Console::WriteLine( S"{0}: {1}", xelement->Name, xelement->InnerXml );
}
}
XmlSerializer* CreateOverrideSerializer()
{
XmlAnyElementAttribute* myAnyElement = new XmlAnyElementAttribute();
XmlAttributeOverrides* xOverride = new XmlAttributeOverrides();
XmlAttributes* xAtts = new XmlAttributes();
xAtts->XmlAnyElements->Add(myAnyElement);
xOverride->Add(__typeof(Group), S"Things", xAtts);
return new XmlSerializer(__typeof(Group) , xOverride);
}
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.