XmlAttributeEventArgs Class
Provides data for the UnknownAttribute event.
Assembly: System.Xml (in System.Xml.dll)
The XmlAttributeEventArgs type exposes the following members.
| Name | Description | |
|---|---|---|
![]() ![]() | Attr | Gets an object that represents the unknown XML attribute. |
![]() | ExpectedAttributes | Gets a comma-delimited list of XML attribute names expected to be in an XML document instance. |
![]() ![]() | LineNumber | Gets the line number of the unknown XML attribute. |
![]() ![]() | LinePosition | Gets the position in the line of the unknown XML attribute. |
![]() ![]() | ObjectBeingDeserialized | Gets the object being deserialized. |
| Name | Description | |
|---|---|---|
![]() ![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() ![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() ![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() ![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() ![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() ![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
For more information about handling events, see Events Overview (Windows Forms).
The UnknownAttribute event occurs only when you call the Deserialize method.
The following example deserializes a class named Group from a file named UnknownAttributes.xml. Whenever an element is found in the file that has no corresponding member in the class, the UnknownAttribute event occurs. To try the example, paste the following XML code into a file named UnknownAttributes.xml.
<?xml version="1.0" encoding="utf-8"?> <Group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" GroupType = 'Technical' GroupNumber = '42' GroupBase = 'Red'> <GroupName>MyGroup</GroupName> </Group>
#using <System.Xml.dll> #using <System.dll> using namespace System; using namespace System::IO; using namespace System::Xml::Serialization; using namespace System::Xml; using namespace System::Xml::Schema; public ref class Group { public: String^ GroupName; }; public ref class Test { public: static void main() { Test^ t = gcnew Test; // Deserialize the file containing unknown elements. t->DeserializeObject( "UnknownAttributes.xml" ); } private: void Serializer_UnknownAttribute( Object^ sender, XmlAttributeEventArgs^ e ) { Console::WriteLine( "Unknown Attribute" ); Console::WriteLine( "\t{0} {1}", e->Attr->Name, e->Attr->InnerXml ); Console::WriteLine( "\t LineNumber: {0}", e->LineNumber ); Console::WriteLine( "\t LinePosition: {0}", e->LinePosition ); Group^ x = dynamic_cast<Group^>(e->ObjectBeingDeserialized); Console::WriteLine( x->GroupName ); Console::WriteLine( sender ); } void DeserializeObject( String^ filename ) { XmlSerializer^ ser = gcnew XmlSerializer( Group::typeid ); // Add a delegate to handle unknown element events. ser->UnknownAttribute += gcnew XmlAttributeEventHandler( this, &Test::Serializer_UnknownAttribute ); // A FileStream is needed to read the XML document. FileStream^ fs = gcnew FileStream( filename,FileMode::Open ); Group^ g = dynamic_cast<Group^>(ser->Deserialize( fs )); fs->Close(); } }; int main() { Test::main(); }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
