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XML Parsing in C#Why .NET is worth it

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Introduction

C# was designed around the .NETplatform for Similarity to C++Safety and ease of useTrue OOP structureInteroperability with other languages(instantiate a C++ class in C#)

Allowing existing code to be used (ie COM objects, DLLs)

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Introduction

What languages influenced its creation? Visual Basic (Rapid App Dev capabilities)

Java (Type-safe Ref Modeling)C++ (Power inherited from C)Smalltalk (true object-oriented structure)

along with a number of predecessors

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The .NET Framework

Base Class Library containing hundredsof classesContains underlying object-orientedprinciples as well as assemblytechnology

All classes are based on one specificclass in the BCL

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Basic C#

Namespaces used instead of include orimport calls

using System;

using System.IO;using System.Xml;

This acts as a container for underlyingclasses, such as Console, XML parsingfunctions

Console.WriteLine(It is called Mario Twins); XmlDocument xmlDoc = new XmlDocument();

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C# Code Structure

using System; // Include the namespace

public class SampleCode { // Create your first classpublic static void Main() { // Main declared within the class

int x, y;Console.Write(Enter two numbers: ); // Write textx = Convert.ToInt32(Console.ReadLine()); // Convert input to inty = Convert.ToInt32(Console.ReadLine());Console.WriteLine(The sum is + Sum(x,y)); // Write text & vars

}public static int Sum(int a, int b) {

return(a + b);}

} // End of class

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C# OOP Structure

OOP structure almost identical to C++ interms of classes, structsJust like C++, it contains private andpublic member variables and functionsThe Main() is placed in one of the classes,and the compiler enters runtime via thisfunctionNamespaces can be used to containclasses for organization

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XML Parsing Features

Using the System.Xml namespace,XmlDocument xmlDoc; // Our XML doc to be loadedXmlTextWriter writer; // The stream well used to write out the resultsxmlDoc.Load(@courselist.xml); // Load the doc

writeFileName = myCourse.getCrsNum() + .xml; writer = new XmlTextWriter(writeFileName, null); // Open the output filewriter.WriteStartElement(courseinfo); // Write an XML elementwriter.WriteElementString(coursename, // Write the inner

myCourse.courseName); // elements writer.WriteEndElement(); // Close the element (well-formed)

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More XML Parsing Goodness

Throw in a few more namespaces for aneven better time System.Xml.XPath allows a DOM tree to beparsed node by node, and evensearched by level of indentationSystem.Xml.Xsl allows a program to loadan .xsl for styling, and then outputeverything to .xml

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More XML Parsing Features

With the System.Xml.XPath namespace tacked on, XmlNodeList xmlNodes;xmlDoc.Load(@courselist.xml); xmlNodes = xmlDoc.SelectNodes(//courselist/course); // Select all individual class elementsif(xmlNodes.Count > 0)

foreach(XmlNode myNode in xmlNodes) {if(myNode.Type == Element) {

myName = myNode[coursename].InnerText;

myNum = myNode[coursenum].InnerText; myInstr = myNode[instructor].InnerText;

Course temp = new Course(myName, );

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Questions?