How to use Using XPath in C#

Introduction

In this article I am going to give an overview of how we can easily parse and get the data from an XML file. For demonstrating, I have created a sample XML file listed below.

{codecitation class="brush: csharp; gutter: true;" width="700px"}





Amal
26

Add the following namespace in your application

using System.Xml.XPath;

Now we can open the XPathDocument object as follows

XPathDocument Doc = new XPathDocument("emp.xml");

Once this is done, we need a XPathNavigator

XPathNavigator navigator = Doc.CreateNavigator();

Using this navigator object, we can traverse through the document. We can provide XPath expressions as shown below

{codecitation class="brush: csharp; gutter: true;" width="700px"}


XPathNodeIterator iterator = navigator.Select("/Employees");
while (iterator.MoveNext())
{
Console.WriteLine(iterator.Current.Name);
Console.WriteLine(iterator.Current.Value);
}

{/codecitation}

Try changing the XPath expression as demonstrated below.

{codecitation class="brush: csharp; gutter: true;" width="700px"}



iterator = navigator.Select("/Employees/Employee");

iterator = navigator.Select("/Employees/Employee[Age>22]");

iterator = navigator.Select("/Employees/Employee[Age>22]/Name");

{/codecitation}

I hope this is help to all.

Thank you

Amal