C# Read and Parse an XML File

In C#, System.Xml namespace is used to deal with the XML files. It has different classes and methods to process XML files. We can read, parse and write an XML file using this namespace.

In this article, we are going to discuss different methods that are used to read and parse an XML file.

C# Program to Read and Parse an XML File Using XmlReader Class

The XmlReader class in C# provides an efficient way to access XML data. XmlReader.Read() method reads the first node of the XML file and then reads the whole file using a while loop.

The correct syntax to use this method is as follows:

XmlReader VariableName = XmlReader.Create(@"filepath");

while (reader.Read())
{
    //Action to perform repeatidly   
}

The XML file that we have read and parsed in our program is as follows. Copy and paste this code into a new text file and save it as .xml to use this file for executing the program given below.

<?xml version="1.0" encoding="utf-8"?>  
<Students>  
 <Student>  
  </Student> 
 <Student>  
    <Name>Olivia</Name>  
    <Grade>A</Grade>  
  </Student>  
  <Student>  
    <Name>Laura</Name>  
    <Grade>A+</Grade>  
  </Student>  
  <Student>  
    <Name>Ben</Name>  
    <Grade>A-</Grade>  
  </Student>  
  <Student>  
    <Name>Henry</Name>  
    <Grade>B</Grade>  
  </Student>  
  <Student>  
    <Name>Monica</Name>  
    <Grade>B</Grade>  
  </Student>  
</Students> 

Example Code:

using System;
using System.Xml;

namespace XMLReadAndParse
{
    class XMLReadandParse
    {
        static void Main(string[] args)
        {
            // Start with XmlReader object  
            //here, we try to setup Stream between the XML file nad xmlReader  
            using (XmlReader reader = XmlReader.Create(@"d:\Example.xml"))
            {
                while (reader.Read())
                {
                    if (reader.IsStartElement())
                    {
                        //return only when you have START tag  
                        switch (reader.Name.ToString())
                        {
                            case "Name":
                                Console.WriteLine("The Name of the Student is " + reader.ReadString());
                                break;
                            case "Grade":
                                Console.WriteLine("The Grade of the Student is " + reader.ReadString());
                                break;
                        }
                    }
                    Console.WriteLine("");
                }
            }
            Console.ReadKey();
        }
    }
}

Here we have created an object of XmlReader and then created a reader stream of the given XML file using Create() method.

Then, we have used XmlReader.Read() method to read the XML file. This method returns a bool value that indicates whether our created stream contains the XML statements or not.

After that, we have checked if there is any starting element using XmlReader.IsStartElement() method. Since we have two element fields in our XML data, we have used the switch statement to read the data from both the fields using the ReadString() method.

Output:

The Name of the Student is Olivia

The Grade of the Student is A



The Name of the Student is Laura

The Grade of the Student is A+



The Name of the Student is Ben

The Grade of the Student is A-



The Name of the Student is Henry

The Grade of the Student is B



The Name of the Student is Monica

The Grade of the Student is B
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