To count number of nodes from xml file we need to write the code like as shown below
XmlDocument readDoc = new
XmlDocument();
readDoc.Load(MapPath("Sample.xml"));
int count = readDoc.SelectNodes("CommentsInformation/Comments").Count;
lblcount.InnerHtml = "Number of Records: "+ count;
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If you want to see it in complete example we need to write the code like as shown below
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<form id="form1"
runat="server">
<div>
<table>
<tr>
<td style="width: 100px">
Name:</td>
<td style="width: 100px">
<asp:TextBox ID="txtName"
runat="server"></asp:TextBox></td>
</tr>
<tr>
<td style="width: 100px">
Email:</td>
<td style="width: 100px">
<asp:TextBox ID="txtEmail"
runat="server"></asp:TextBox></td>
</tr>
<tr>
<td></td>
<td>
<asp:Button ID="btnSubmit"
runat="server"
OnClick="btnSubmit_Click"
Text="Submit"
/></td>
</tr>
</table>
<br />
<label id="lblcount"
runat="server"
/>
</div>
</form>
</body>
</html>
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After that add XML file to your application and give name as "Sample.xml" then add root element in xml file otherwise it will through error. Here I added CommentInformation as root element in XML file.
<?xml version="1.0" encoding="utf-8"?>
<CommentsInformation>
</CommentsInformation>
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After that add this namespace in codebehind
C#
Code
using System;
using System.Xml;
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After that add below code in code behind
protected void
Page_Load(object sender, EventArgs e)
{
}
protected void
btnSubmit_Click(object sender, EventArgs e)
{
XmlDocument xmldoc = new
XmlDocument();
xmldoc.Load(Server.MapPath("Sample.xml"));
XmlElement parentelement = xmldoc.CreateElement("Comments");
XmlElement name = xmldoc.CreateElement("Name");
name.InnerText = txtName.Text;
XmlElement email = xmldoc.CreateElement("Email");
email.InnerText = txtEmail.Text;
parentelement.AppendChild(name);
parentelement.AppendChild(email);
xmldoc.DocumentElement.AppendChild(parentelement);
xmldoc.Save(Server.MapPath("Sample.xml"));
XmlDocument readDoc = new
XmlDocument();
readDoc.Load(MapPath("Sample.xml"));
int count = readDoc.SelectNodes("CommentsInformation/Comments").Count;
lblcount.InnerHtml = "Number
of Records: "+ count;
}
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Output
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