Save form data to XML file

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Xml" %>

<script runat="server">
    protected void btnSave_Click(object sender, EventArgs e)
    {
        string xmlPath = MapPath("Books.xml");
        XmlDocument doc = new XmlDocument();
        //Check if the file already exists or not
        if (System.IO.File.Exists(xmlPath))
        {
            doc.Load(xmlPath);
            XmlNode bookNode = CreateBookNode(doc);
            //Get reference to the book node and append the book node to it
            XmlNode bookStoreNode = doc.SelectSingleNode("bookstore");
            bookStoreNode.AppendChild(bookNode);
            lblResult.Text = "XML Document has been successfully updated";
        }
        else
        {            
            XmlNode declarationNode = doc.CreateXmlDeclaration("1.0", "", "");
            doc.AppendChild(declarationNode);
            XmlNode comment = doc.CreateComment("This file represents a fragment of a book store inventory database");
            doc.AppendChild(comment);            
            XmlNode bookstoreNode = doc.CreateElement("bookstore");
            XmlNode bookNode = CreateBookNode(doc);                        
            //Append the book node to the bookstore node            
            bookstoreNode.AppendChild(bookNode);
            //Append the bookstore node to the document
            doc.AppendChild(bookstoreNode);
            lblResult.Text = "XML Document has been successfully created";
        }
        doc.Save(xmlPath);
    }

    XmlNode CreateBookNode(XmlDocument doc)
    {
        XmlNode bookNode = doc.CreateElement("book");
        //Add the genre attribute to the book node
        XmlAttribute genreAttribute = doc.CreateAttribute("genre");
        genreAttribute.Value = txtGenre.Text;        
        bookNode.Attributes.Append(genreAttribute);

        //Add all the children of the book node            
        XmlNode titleNode = doc.CreateElement("title");
        titleNode.InnerText = txtTitle.Text;
        bookNode.AppendChild(titleNode);

        //Create the author node and its children
        XmlNode authorNode = doc.CreateElement("author");
        XmlNode firstNameNode = doc.CreateElement("first-name");
        firstNameNode.InnerText = txtFirstName.Text;
        authorNode.AppendChild(firstNameNode);

        XmlNode lastNameNode = doc.CreateElement("last-name");
        lastNameNode.InnerText = txtLastName.Text;
        authorNode.AppendChild(lastNameNode);

        bookNode.AppendChild(authorNode);

        XmlNode priceNode = doc.CreateElement("price");
        priceNode.InnerText = txtPrice.Text;
        bookNode.AppendChild(priceNode);

        return bookNode;
    }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Creating an XmlDocument</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>        
        <table>
            <tr>
                <td colspan="2" style="width: 174px; height: 40px">
                    <b>Book Details:</b>
                </td>                               
            </tr>
            <tr>
                <td style="width: 101px; height: 44px">
                    Genre:
                </td>
                <td style="width: 204px; height: 44px">
                    <asp:TextBox ID="txtGenre" runat="server" Width="201px"></asp:TextBox>
                </td>
            </tr>
             <tr>
                <td style="width: 101px; height: 44px">
                    Title:
                </td>
                <td style="width: 204px; height: 44px">
                    <asp:TextBox ID="txtTitle" runat="server" Width="201px"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td style="width: 101px; height: 41px">
                    First Name:
                </td>
                <td style="width: 204px; height: 41px">
                    <asp:TextBox ID="txtFirstName" runat="server" Width="201px"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td style="width: 101px; height: 41px">
                    Last Name:
                </td>
                <td style="width: 204px; height: 41px">
                    <asp:TextBox ID="txtLastName" runat="server" Width="201px"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td style="width: 101px; height: 41px">
                    Price:
                </td>
                <td style="width: 204px; height: 41px">
                    <asp:TextBox ID="txtPrice" runat="server" Width="201px"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td colspan="2" style="width: 101px; height: 41px">
                    <asp:Button Text="Save" runat="server" ID="btnSave" Width="95px" OnClick="btnSave_Click"/>
                </td>                
            </tr>
            <tr>
                <td colspan="2" style="width: 101px; height: 41px">
                    <asp:Label Text="Save" runat="server" ID="lblResult" Width="295px"/>
                </td>                
            </tr>
        </table>
    </div>
    </form>
</body>
</html>
Save form data to XML file : Form Save « XML « ASP.Net

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