Simple XML pursing with XPath

Hello again. Today i will talk about how to purse XML simply with .NET’s XPath features.We know XML now days gets very important thing for transferring or what ever. I will show how simply we can Purse a XML file.
Suppose we have a XML file named “Sample.xml” and the structure of that XML file is as bellow:


<span class="lnum">   1:  </span><span class="kwrd">&lt;?</span><span class="html">xml</span> <span class="attr">version</span><span class="kwrd">="1.0"</span> <span class="attr">encoding</span><span class="kwrd">="utf-8"</span> ?<span class="kwrd">&gt;</span>

1: <?xml version="1.0" encoding="utf-8" ?>


<span class="lnum">   2:  </span><span class="kwrd">&lt;</span><span class="html">items</span><span class="kwrd">&gt;</span>

2: <items>


<span class="lnum">   3:  </span>  <span class="kwrd">&lt;</span><span class="html">item</span><span class="kwrd">&gt;</span>

3: <item>


<span class="lnum">   4:  </span>    <span class="kwrd">&lt;</span><span class="html">name</span><span class="kwrd">&gt;</span>Tanvir<span class="kwrd">&lt;/</span><span class="html">name</span><span class="kwrd">&gt;</span>

4: <name>Tanvir</name>


<span class="lnum">   5:  </span>    <span class="kwrd">&lt;</span><span class="html">id</span><span class="kwrd">&gt;</span>03-04304-3<span class="kwrd">&lt;/</span><span class="html">id</span><span class="kwrd">&gt;</span>

5: <id>03-04304-3</id>


<span class="lnum">   6:  </span>  <span class="kwrd">&lt;/</span><span class="html">item</span><span class="kwrd">&gt;</span>

6: </item>


<span class="lnum">   7:  </span>  <span class="kwrd">&lt;</span><span class="html">item</span><span class="kwrd">&gt;</span>

7: <item>


<span class="lnum">   8:  </span>    <span class="kwrd">&lt;</span><span class="html">name</span><span class="kwrd">&gt;</span>Anowar<span class="kwrd">&lt;/</span><span class="html">name</span><span class="kwrd">&gt;</span>

8: <name>Anowar</name>


<span class="lnum">   9:  </span>    <span class="kwrd">&lt;</span><span class="html">id</span><span class="kwrd">&gt;</span>04-04304-2<span class="kwrd">&lt;/</span><span class="html">id</span><span class="kwrd">&gt;</span>

9: <id>04-04304-2</id>


<span class="lnum">  10:  </span>  <span class="kwrd">&lt;/</span><span class="html">item</span><span class="kwrd">&gt;</span>

10: </item>


<span class="lnum">  11:  </span><span class="kwrd">&lt;/</span><span class="html">items</span><span class="kwrd">&gt;</span>

11: </items>


<span style="color: blue"></span>now open a Default.aspx page and import the sub class Xml,and Xml.XPath by writing as bellow:

now open a Default.aspx page and import the sub class Xml,and Xml.XPath by writing as bellow:


<span class="lnum">   1:  </span><span class="kwrd">using</span> System.Xml;

1: using System.Xml;


<span class="lnum">   2:  </span><span class="kwrd">using</span> System.Xml.XPath;

2: using System.Xml.XPath;


Now making a XPathDocument document we can iterate our queries as given in nav.Select("/items/item/name") . here /items/item/name is our query ,where Items is the root node . item is the child node and name is our desired node which is going to be explored.<br />The following code is in C#.NET for exploring XML node with XPath.

Now making a XPathDocument document we can iterate our queries as given in nav.Select("/items/item/name") . here /items/item/name is our query ,where Items is the root node . item is the child node and name is our desired node which is going to be explored. The following code is in C#.NET for exploring XML node with XPath.


 XPathDocument xmlDoc = <span class="kwrd">new</span> XPathDocument(MapPath(<span class="str">"Sample.xml"</span>));

XPathDocument xmlDoc = new XPathDocument(MapPath("Sample.xml"));


 XPathNavigator nav = xmlDoc.CreateNavigator();

XPathNavigator nav = xmlDoc.CreateNavigator();


 XPathNodeIterator iterate = nav.Select(<span class="str">"/items/item/name"</span>);

XPathNodeIterator iterate = nav.Select("/items/item/name");


 <span class="kwrd">while</span>(iterate.MoveNext())

while(iterate.MoveNext())

{

{


    Response.Write(iterate.Current.Name); <span class="rem">// print the node name</span>

Response.Write(iterate.Current.Name); // print the node name


    Response.Write(<span class="str">"&amp;nbsp"</span>);

Response.Write("&nbsp");


    Response.Write(iterate.Current.Value); <span class="rem">// print the value</span>

Response.Write(iterate.Current.Value); // print the value


    Response.Write(<span class="str">"&lt;br /&gt;"</span>);

Response.Write(" ");

}

}