Implement User Comments Form for Blog using XML in ASP.Net

Here is for the people who wanna know how to implement simple user comments form using xml.

HTML

<form id="form1" runat="server">
<table border="0" cellpadding="2" cellspacing="2">
    <tr>
        <td>
            Name:
        </td>
        <td>
            <asp:TextBox ID="TextBox1" runat="server" Width="231px"></asp:TextBox>
        </td>
    </tr>
    <tr>
        <td>
            Email:
        </td>
        <td>
            <asp:TextBox ID="TextBox2" runat="server" Width="231px"></asp:TextBox>
        </td>
    </tr>
    <tr>
        <td>
            Comment:
        </td>
        <td>
            <asp:TextBox ID="TextBox3" TextMode="MultiLine" runat="server" Width="235px" Height="88px"></asp:TextBox>
        </td>
    </tr>
    <tr>
        <td>
            <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Add" />
        </td>
        <td>
            <asp:Button ID="Button4" runat="server" OnClick="Button4_Click" Text="Clear" />
        </td>
    </tr>
</table>
<br />
<asp:GridView ID="GridView1" runat="server" CellPadding="4" OnSelectedIndexChanged="GridView1_SelectedIndexChanged"
    Width="428px" AutoGenerateColumns="False" BackColor="White" BorderColor="#CC9966"
    BorderStyle="None" BorderWidth="1px">
    <FooterStyle BackColor="#FFFFCC" ForeColor="#330099" />
    <Columns>
        <asp:BoundField DataField="name" HeaderText="Name" />
        <asp:BoundField DataField="email" HeaderText="Email" />
        <asp:BoundField DataField="comments" HeaderText="Comment" />
    </Columns>
    <RowStyle BackColor="White" ForeColor="#330099" />
    <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
    <PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" />
    <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" />
    <SortedAscendingCellStyle BackColor="#FEFCEB" />
    <SortedAscendingHeaderStyle BackColor="#AF0101" />
    <SortedDescendingCellStyle BackColor="#F6F0C0" />
    <SortedDescendingHeaderStyle BackColor="#7E0000" />
</asp:GridView>
</form>

Namespaces

using System.Xml;
using System.Data;

C#

internal int selectIndex
{
    get
    {
        if (this.Session["Page_selectIndex"] == null)
            return -1;
        return Int32.Parse(this.Session["Page_selectIndex"].ToString());
    }
    set
    {
        this.Session["Page_selectIndex"] = value;
    }
}

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        loadXmlData();
    }
}

private void loadXmlData()
{
    DataSet myDs = new DataSet();
    myDs.ReadXml(Server.MapPath(@"App_Data\info.xml"));

    if (myDs.Tables.Count > 0)
    {
        this.GridView1.DataSource = myDs;
        this.GridView1.DataBind();
    }
}

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
    selectIndex = this.GridView1.SelectedIndex;
    FindXmlData(selectIndex);
}

private void FindXmlData(int selectedIndex)
{
    XmlDocument xmldoc = new XmlDocument();
    xmldoc.Load(Server.MapPath(@"App_Data\info.xml"));
    XmlNodeList xmlnodelist = xmldoc.DocumentElement.ChildNodes;
    XmlNode xmlnode = xmlnodelist.Item(selectedIndex);
    this.TextBox1.Text = xmlnode["name"].InnerText;
    this.TextBox2.Text = xmlnode["email"].InnerText;
    this.TextBox3.Text = xmlnode["comments"].InnerText;
}

protected void Button1_Click(object sender, EventArgs e)
{
    XmlDocument xmldoc = new XmlDocument();
    xmldoc.Load(Server.MapPath(@"App_Data\info.xml"));
    XmlElement newelement = xmldoc.CreateElement("usercomments");
    XmlElement xmlName = xmldoc.CreateElement("name");
    XmlElement xmlEmail = xmldoc.CreateElement("email");
    XmlElement xmlContent = xmldoc.CreateElement("comments");

    xmlName.InnerText = this.TextBox1.Text.Trim();
    xmlEmail.InnerText = this.TextBox2.Text.Trim();
    xmlContent.InnerText = this.TextBox3.Text.Trim();


    newelement.AppendChild(xmlName);
    newelement.AppendChild(xmlEmail);
    newelement.AppendChild(xmlContent);

    xmldoc.DocumentElement.AppendChild(newelement);
    xmldoc.Save(Server.MapPath(@"App_Data\info.xml"));

    loadXmlData();
    this.TextBox1.Text = "";
    this.TextBox2.Text = "";
    this.TextBox3.Text = "";
}


protected void Button4_Click(object sender, EventArgs e)
{
    this.TextBox1.Text = "";
    this.TextBox2.Text = "";
    this.TextBox3.Text = "";
}

XML

<?xml version="1.0" encoding="utf-8"?>
<infoRoot>
    <usercomments>
        <name>John Hammond</name>
        <email>JohnHammond@Test.com</email>
        <comments>Test</comments>
    </usercomments>
    <usercomments>
        <name>Suzanne Mathews</name>
        <email>Mathews@Test.com</email>
        <comments>Test</comments>
    </usercomments>
</infoRoot>

Screenshot