XmlAttributeEventArgs Class
Provides data for the UnknownAttribute event.
Assembly: System.Xml (in System.Xml.dll)
| 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 the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | MemberwiseClone() | |
![]() | 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(); }
Available since 1.1
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.


