Question

ASP.NET Form Edit XML Nodes

Asked by: jay_eire

Hi Guys,
I have a ASP.NET form that is adding books to my XML file, I want to change this around so that I can edit existing books already in my XML file using the form, Im guessing that if i pass the BookID to the page as in BookEdit.aspx?BookID=1 that it should return the xml nodes to the various fields to allow me to update them, how do i go about doing this? some example code would be a great help.

below is my code and XML file, im using the editor from the AJAX Toolkit .net framework 3.5

Thanks
Jay

<%@ Page Language="C#" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit.HTMLEditor" tagprefix="cc1" %>
<%@ Import Namespace="System.Xml" %>
 
<script runat="server">
    protected void btnSave_Click(object sender, EventArgs e)
    {
        string xmlPath = MapPath("App_Data/BookStore.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);
 
        XmlNode detailsNode = doc.CreateElement("details");
        detailsNode.InnerText = Editor1.Content;
        bookNode.AppendChild(detailsNode);
 
        XmlNode BookIDNode = doc.CreateElement("BookID");
        BookIDNode.InnerText = txtBookID.Text;
        bookNode.AppendChild(BookIDNode);
 
        return bookNode;
    }
    
</script>
 
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" 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 style="width: 101px; height: 41px">
                    BookID:
                </td>
                <td style="width: 204px; height: 41px">
                    <asp:TextBox ID="txtBookID" runat="server" Width="201px"></asp:TextBox>
                </td>
            </tr>
            
                        <tr>
                <td style="width: 101px; height: 41px">
                    Details:
                </td>
                <td style="width: 204px; height: 41px">
                
        <asp:ScriptManager ID="ScriptManager1" runat="server" />
        
        <cc1:Editor 
            ID="Editor1" 
            Width="450px"  
            Height="200px"
            runat="server"/>
 
                    
                </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>
 
<?xml version="1.0" encoding="utf-8"?>
<bookstore>
  <book genre="Science">
    <title>Book 1</title>
    <author>
      <first-name>Fname 1</first-name>
      <last-name>Lname 1</last-name>
    </author>
    <price>25.00</price>
    <details>Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 &lt;span style="font-weight: bold; color: #ff0000;"&gt;Details 1 Details 1&lt;/span&gt; Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 Details 1 </details>
    <BookID>1</BookID>
  </book>
  <book genre="History">
    <title>Book 2</title>
    <author>
      <first-name>Fname 2</first-name>
      <last-name>Lname 2</last-name>
    </author>
    <price>55.00</price>
    <details>Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 &lt;span style="font-weight: bold; color: #ff0000;"&gt;Details 2 Details 2&lt;/span&gt; Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 Details 2 </details>
    <BookID>2</BookID>
  </book>
  <book genre="Math">
    <title>Book 3</title>
    <author>
      <first-name>Fname 3</first-name>
      <last-name>Lname 3</last-name>
    </author>
    <price>25.00</price>
    <details>Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 &lt;span style="font-weight: bold; color: #ff0000;"&gt;Details 3 Details 3&lt;/span&gt; Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 Details 3 </details>
    <BookID>3</BookID>
  </book>
  <book genre="Art">
    <title>Book 3</title>
    <author>
      <first-name>Fname 3</first-name>
      <last-name>Lname 3</last-name>
    </author>
    <price>28.00</price>
    <details>Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 &lt;span style="font-weight: bold; color: #ff0000;"&gt;Details 4 Details 4&lt;/span&gt; Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 Details 4 </details>
    <BookID>4</BookID>
  </book>
</bookstore>

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Asked On: 2009-07-04 at 04:13:09ID24543742
Topics: Programming for ASP.NET
,; .NET Framework 3.x versions
,; XPath
Participating Experts: 1
Points: 500
Comments: 3

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Answers

by: jinalPosted on 2009-07-04 at 06:02:15ID: 24776781

To Load Node from XmlFile as per query string parameter.

protected void Page_Load(object sender, EventArgs e)
{
if (Request.QueryString["BookID"] != null)
{
string str = Request.QueryString["BookID"];
string xmlPath = MapPath("App_Data/BookStore.xml");
XmlDocument doc = new XmlDocument();
if (System.IO.File.Exists(xmlPath))
{
doc.Load(xmlPath);
XmlNode node = doc.SelectSingleNode("/bookstore/book[BookID=" + str.Trim() + "]");
if (node != null)
{
txtBookID.ReadOnly = true;
txtBookID.Text = str;
txtTitle.Text = node.SelectSingleNode("title").InnerText;
txtFirstName.Text = node.SelectSingleNode("author/first-name").InnerText;
txtLastName.Text = node.SelectSingleNode("author/last-name").InnerText; ;
txtPrice.Text = node.SelectSingleNode("price").InnerText; ;
txtGenre.Text = node.Attributes["genre"].Value;
Editor1.Text = node.SelectSingleNode("details").InnerText; ;
}
}
}
}

Pass EditForm.aspx?BookID=1 . It will Load node with Book ID 1.

Please take note that i removed Editor Control . So just replace with that otherwise it works fine.

by: jinalPosted on 2009-07-04 at 06:13:36ID: 24776804

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Xml" %>
<%@ Import Namespace="System.Xml.XPath" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
if (Request.QueryString["BookID"] != null)
{
if (!Page.IsPostBack)
{
string str = Request.QueryString["BookID"];
string xmlPath = MapPath("App_Data/BookStore.xml");
XmlDocument doc = new XmlDocument();
if (System.IO.File.Exists(xmlPath))
{
doc.Load(xmlPath);
XmlNode node = doc.SelectSingleNode("/bookstore/book[BookID=" + str.Trim() + "]");
if (node != null)
{

txtBookID.Text = str;
txtTitle.Text = node.SelectSingleNode("title").InnerText;
txtFirstName.Text = node.SelectSingleNode("author/first-name").InnerText;
txtLastName.Text = node.SelectSingleNode("author/last-name").InnerText; ;
txtPrice.Text = node.SelectSingleNode("price").InnerText; ;
txtGenre.Text = node.Attributes["genre"].Value;
Editor1.Text = node.SelectSingleNode("details").InnerText; ;
}
}
}
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
string xmlPath = MapPath("App_Data/BookStore.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");
XmlNode checkExistingNode = bookStoreNode.SelectSingleNode("book[BookID=" + txtBookID.Text.Trim() + "]");
if (checkExistingNode != null)
{
bookStoreNode.ReplaceChild(bookNode, checkExistingNode);
}
else
{
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");

//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);

XmlNode detailsNode = doc.CreateElement("details");
detailsNode.InnerText = Editor1.Text;
bookNode.AppendChild(detailsNode);

XmlNode BookIDNode = doc.CreateElement("BookID");
BookIDNode.InnerText = txtBookID.Text;
bookNode.AppendChild(BookIDNode);

return bookNode;
}

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" 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 style="width: 101px; height: 41px">
BookID:
</td>
<td style="width: 204px; height: 41px">
<asp:TextBox ID="txtBookID" runat="server" Width="201px"></asp:TextBox>
</td>
</tr>

<tr>
<td style="width: 101px; height: 41px">
Details:
</td>
<td style="width: 204px; height: 41px">
<asp:TextBox ID="Editor1" runat="server" TextMode="MultiLine" Rows="5"></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>

by: jay_eirePosted on 2009-07-04 at 07:46:56ID: 31599750

Thanks this is perfect.

20120131-EE-VQP-002

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Question

ASP.NET Form Edit XML Nodes

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Programming for ASP.NET

.NET Framework 3.x versions

XPath

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Testimonials

Testimonials

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Business Clients

In the Press

In the Press

In the Press