//-----------------------------------------------------------------------
//  This file is part of the Microsoft .NET SDK Code Samples.
// 
//  Copyright (C) Microsoft Corporation.  All rights reserved.
// 
//This source code is intended only as a supplement to Microsoft
//Development Tools and/or on-line documentation.  See these other
//materials for detailed information regarding Microsoft code samples.
// 
//THIS CODE AND INFORMATION ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY
//KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
//IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
//PARTICULAR PURPOSE.
//-----------------------------------------------------------------------
#using <System.Xml.Dll>

using namespace System;
using namespace System::Xml;

namespace MicrosoftSamplesXml
{
    public ref class XmlDocumentEventSample
    {
    protected:
        static String^ document = "books.xml";

    public:
        void Main()
        {
            Console::WriteLine();
            Console::WriteLine("Loading file {0} ...", document);
            
            XmlDocument^ xmlDocument = gcnew XmlDocument();

            xmlDocument->Load(document);
            
            //Add MyEvent Handlers here
            xmlDocument->NodeChanged += gcnew XmlNodeChangedEventHandler(this, &XmlDocumentEventSample::NodeChangedEvent);
            xmlDocument->NodeInserted += gcnew XmlNodeChangedEventHandler(this, &XmlDocumentEventSample::NodeInsertedEvent);

            Console::WriteLine("XmlDocument loaded with XML data successfully ...");

            // Increase all the book prices by 2%
            Console::WriteLine();
            Console::WriteLine("Increase all the book prices by 2% ...");
            Console::WriteLine();

            // Create a list of the <book> nodes and change their values
            XmlNodeList^ xmlNodeList = xmlDocument->SelectNodes("descendant::book/price");
            
            for each (XmlNode^ xmlNode in xmlNodeList)
            {
                Console::WriteLine("<" + xmlNode->Name + "> " + xmlNode->InnerText);
                Double price = Double::Parse(xmlNode->InnerText);
                Double newPrice = (Double)price * 1.02;
                xmlNode->InnerText = newPrice.ToString("#.00");
            }
            
            Console::WriteLine();
            Console::WriteLine("Adding a new book to the XmlDocument ...");
            Console::WriteLine();

            // Create a new book
            XmlDocumentFragment^ newBook = xmlDocument->CreateDocumentFragment();

            newBook->InnerXml = ("<book genre=\" Object-Orientated Technology \" publicationdate=\" 1994 \" " +
                "ISBN=\"0-201-63361-2\">" +
                "<title>Design Patterns - Elements of Reusable Object-Orientated Software</title>" +
                "<author>" +
                "<first-name>Eric</first-name>" +
                "<last-name>Gamma</last-name>" +
                "</author>" +
                "<price>49.95</price>" +
                "</book>");
            
            XmlElement^ rootXmlElement = xmlDocument->DocumentElement;

            // Add the new book to the XmlDocument
            rootXmlElement->InsertBefore(newBook, rootXmlElement->FirstChild);

            Console::WriteLine();
            Console::WriteLine("Cloning the first book node in the XmlDocument ...");
            Console::WriteLine();


            // Clone the node and note that by cloning the node we
            // are inserting it again into the XmlDocument
            XmlNode^ newBook2 = xmlDocument->DocumentElement->FirstChild->Clone();
            
            Console::WriteLine("Sample Complete");
            Console::WriteLine("Press Enter to Exit");
            Console::ReadLine();
        }

        void NodeChangedEvent(Object^ src, XmlNodeChangedEventArgs^ args)
        {
            Console::Write("Node Changed Event: <" + args->Node->Name + "> changed");
            if (args->Node->Value != nullptr)
            {
                Console::WriteLine(" with value " + args->Node->Value);
            }
            else
            {
                Console::WriteLine("");
            }
        }

        void NodeInsertedEvent(Object^ src, XmlNodeChangedEventArgs^ args)
        {
            Console::Write("Node Inserted Event: <" + args->Node->Name + "> inserted");
            if (args->Node->Value != nullptr)
            {
                Console::WriteLine(" with value " + args->Node->Value);
            }
            else
            {
                Console::WriteLine("");
            }
        }
   };

}

void main()
{
    //Import the new package
    using namespace MicrosoftSamplesXml;
       
    //Create the class
    XmlDocumentEventSample^ myXmlDocumentEventSample = gcnew XmlDocumentEventSample;
    myXmlDocumentEventSample->Main();
   
}