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Part 1 - LINQ to XML

In this video we will discuss creating an XML document using LINQ to XML.



What is Functional Construction?
As far as LINQ to XML is concerned there is a technical term called Functional Construction. First let us understand what this term means with an example. Functional construction is the ability to create an XML tree in a single statement.



Let us now discuss, creating an an XML tree in a single statement. We want to create an XML tree that looks as shown below.
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<!--Creating an XML Tree using LINQ to XML-->
<Students>
  <Student Id="101">
    <Name>Mark</Name>
    <Gender>Male</Gender>
    <TotalMarks>800</TotalMarks>
  </Student>
  <Student Id="102">
    <Name>Rosy</Name>
    <Gender>Female</Gender>
    <TotalMarks>900</TotalMarks>
  </Student>
  <Student Id="103">
    <Name>Pam</Name>
    <Gender>Female</Gender>
    <TotalMarks>850</TotalMarks>
  </Student>
  <Student Id="103">
    <Name>John</Name>
    <Gender>Male</Gender>
    <TotalMarks>950</TotalMarks>
  </Student>
</Students>

All the classes to create an XML document are present in System.Xml.Linq namespace. To create
XML Document use XDocument class
XML Declaration use XDeclaration class
XML Comment use XComment class
XML Element use XElement class
XML Attribute use XAttribute class
functional construction in linq to xml

Code to create the XML Document 
using System.Xml.Linq;

namespace Demo
{
    class Program
    {
        public static void Main()
        {
            XDocument xmlDocument = new XDocument(
                new XDeclaration("1.0", "utf-8", "yes"),

                new XComment("Creating an XML Tree using LINQ to XML"),

                new XElement("Students",

                    new XElement("Student", new XAttribute("Id", 101),
                        new XElement("Name", "Mark"),
                        new XElement("Gender", "Male"),
                        new XElement("TotalMarks", 800)),

                    new XElement("Student", new XAttribute("Id", 102),
                        new XElement("Name", "Rosy"),
                        new XElement("Gender", "Female"),
                        new XElement("TotalMarks", 900)),

                    new XElement("Student", new XAttribute("Id", 103),
                        new XElement("Name", "Pam"),
                        new XElement("Gender", "Female"),
                        new XElement("TotalMarks", 850)),

                    new XElement("Student", new XAttribute("Id", 104),
                        new XElement("Name", "John"),
                        new XElement("Gender", "Male"),
                        new XElement("TotalMarks", 950))));

            xmlDocument.Save(@"C:\Demo\Demo\Data.xml");
        }
    }
}

Upon running the console application, an XML file with name Data.xml should be created in the respective project folder. To see the xml file, click on "Show All Files" icon in the solution explorer. Double click on the xml file to open it in visual studio.

LINQ to XML tutorial

1 comment:

  1. I don this but unfortunately it arises an error. I very tried to soled it but it was very boring I do nothing.the error is something like this :
    Additional information : The ' ' character, hexadecimal 0x20 value, cannot be included in the name.
    hope you understand the problem waiting for your answer. thank you.

    ReplyDelete

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