Append XML Data With Append Method

Vijay Prativadi
13y
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Article

Introduction

Today, in this article let's play around with one of the interesting and most useful concepts in XML in C#.

Question: What is appending XML data with the append method?

In simple terms "It provides flexibility to append XML data and save the changes to the XML document.".

Step 1: Create a new "ASP.NET Web Application", as in:

Step 2: Add a new XML file item to the project and name it Employee.xml.

Step 3: The complete code of webform1.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="AppendXMLDataApp._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>

<body>

<div>

<table>

<tr>

<asp:Label ID="Label1" runat="server" Text="Append XML Data with Append Method" Font-Bold="true"

Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>

</td>

</tr>

<tr>

<td>

<asp:Label ID="Label6" runat="server" Text="Please Enter Id" Font-Size="Large" Font-Names="Verdana"

Font-Italic="true"></asp:Label>

</td>

<td>

<asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<td>

<asp:Label ID="Label2" runat="server" Text="Please Enter FirstName" Font-Size="Large"

Font-Names="Verdana" Font-Italic="true"></asp:Label>

</td>

<td>

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<td>

<asp:Label ID="Label3" runat="server" Text="Please Enter LastName" Font-Size="Large"

Font-Names="Verdana" Font-Italic="true"></asp:Label>

</td>

<td>

<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<td>

<asp:Label ID="Label4" runat="server" Text="Please Enter Age" Font-Size="Large" Font-Names="Verdana"

Font-Italic="true"></asp:Label>

</td>

<td>

<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<asp:Button ID="Button1" runat="server" Text="Append Data" Font-Names="Verdana" Width="213px"

BackColor="Orange" Font-Bold="True" OnClick="Button1_Click" />

</td>

</tr>

<tr>

<asp:Label ID="Label5" runat="server" Font-Bold="true" Font-Names="Verdana"></asp:Label>

</td>

</tr>

</table>

</div>

</center>

</form>

</body>

</html>

Step 4: The complete code of webform1.aspx.cs looks like this:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Xml;

namespace AppendXMLDataApp

{

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void Button1_Click(object sender, EventArgs e)

{

if (string.IsNullOrEmpty(TextBox4.Text) || string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text) || string.IsNullOrEmpty(TextBox3.Text))

{

Label5.Text = "Please Enter Some Values";

Label5.ForeColor = System.Drawing.Color.Red;

}

else

{

XmlDocument doc = new XmlDocument();

XmlNode rootNode = doc.CreateXmlDeclaration("1.0", "UTF-8", null);

doc.AppendChild(rootNode);

XmlNode employeesNode = doc.CreateElement("Employees");

doc.AppendChild(employeesNode);

XmlNode employeeNode = doc.CreateElement("Employee");

employeesNode.AppendChild(employeeNode);

XmlNode idNode = doc.CreateElement("Id");

idNode.InnerText = TextBox4.Text;

employeeNode.AppendChild(idNode);

XmlNode firstNameNode = doc.CreateElement("FirstName");

firstNameNode.InnerText = TextBox1.Text;

employeeNode.AppendChild(firstNameNode);

XmlNode lastNameNode = doc.CreateElement("LastName");

lastNameNode.InnerText = TextBox2.Text;

employeeNode.AppendChild(lastNameNode);

XmlNode ageNode = doc.CreateElement("Age");

ageNode.InnerText = TextBox3.Text;

employeeNode.AppendChild(ageNode);

doc.Save(Server.MapPath("Employee.xml"));

Label5.Text = "Data Appended Successfully";

Label5.ForeColor = System.Drawing.Color.Green;

TextBox4.Text = string.Empty;

TextBox1.Text = string.Empty;

TextBox2.Text = string.Empty;

TextBox3.Text = string.Empty;

}

Step 5: The output of the application looks like this:

Step 6: The data appending output of the application looks like this:

Step 7: The complete code of Employee.xml looks like this:

<?xml version="1.0" encoding="UTF-8"?>

<FirstName>Vijay</FirstName>

<LastName>Prativadi</LastName>

</Employee>

</Employees>

I hope this article is useful for you.