Solved

How to Select Next node using linq in xml?

Posted on 2014-02-26
3
512 Views
Last Modified: 2016-02-10
hi guys... I got this problem...
I've created 4 buttons that their names are first, next, previous, last.
what i want is that when the user clicks the first button the application throws a messageBox showing the values of the first book and when the user clicks next to show in another messageBox with the next book of my xml document, the same with previous and last...
i got this xml:

<?xml version="1.0" encoding="utf-8"?>
<books>
  <book>
    <title>Beginning Visual C#</title>
    <author>Karli Watson</author>
    <code>7582</code>
  </book>
  <book>
    <title>Professional C# 2nd Edition</title>
    <author>Simon Robinson</author>
    <code>7043</code>
  </book>
  <book>
    <title>Beginning XML</title>
    <author>Fawcett</author>
    <code>1500</code>
  </book>
  <book>
    <title>Silverlight 5</title>
    <author>Diaz</author>
    <code>1501</code>
  </book>
  <book>
    <title>Professional Silverlight 4 in c#</title>
    <author>MacDonald</author>
    <code>1502</code>
  </book>
</books>

Open in new window



and i got this code:

//first button
            XElement xEle = XElement.Load(@"C:\books.xml");

            var emp1 = xEle.Descendants("book").ElementAt(0);
            

            MessageBox.Show("Title: " + emp1.Element("title").Value + System.Environment.NewLine + "Author: " + emp1.Element("author").Value + System.Environment.NewLine + "Code: " + emp1.Element("code").Value);

Open in new window


what can i do for the next button?
0
Comment
Question by:Conrado ZAVALA
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 75

Accepted Solution

by:
käµfm³d   👽 earned 500 total points
ID: 39889442
What you want to do is maintain a reference to the currently-selected book node. That is more or less what your emp1 variable is doing. You would, however, need to change the use of var to the actual type name because you are going to need to widen the scope of that variable to be class-level. Once you do that, you can use this reference to navigate the document with your other buttons. For example, "Next" might be implemented as:

protected void btnNext_Click(object sender, EventArgs e)
{
    emp1 = emp1.NextNode;  // next sibling node, which (ideally) should be another <book>
}

Open in new window


The "Previous" button could be implemented in a similar fashion, using the PreviousNode method instead.
0
 

Author Comment

by:Conrado ZAVALA
ID: 39889508
what would be the actual type name of var?? i don't get it yet... xD
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 39889905
XElement
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
TCP Chat/GPS application security thru firewall 4 57
Save json data from URL using SSIS 1 77
Stop Git from being my repository 1 51
Easiest intro into .NET CORE? 2 34
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question