Develop Reference

Windows application to pull through xml data based on xpath with multiple conditions

I'm trying to create a program that reads the xml data and pulls through the data based on the xpath input. I have a couple of questions i need help with:
1) It is only pulling through the first node where I want it to pull through all nodes. My code is below, can you advise what I need to amend to do this so rather than just pulling through the first answer it pulls through all the data relevant to that path?
2) I have added a third textbox (which is not coded in yet) that you can input a condition so it works with the first xpath value The example is below:
/Clients/Client1/Name (This is the value)
Clients/Client1[Name = 'Smith'] (this is the condition)
I dont know how to code this part to work wih the first text box that is looking at the value?
private void button1_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(lPrompt.Text) && !string.IsNullOrEmpty(textBox1.Text))
{
try
{
XmlDocument xdoc = new XmlDocument();
xdoc.Load(tbFile.Text);
XPathNavigator xnav = xdoc.CreateNavigator();
bool innerXml = checkBox2.Checked;
if (innerXml)
textBox2.Text = xnav.SelectSingleNode(textBox1.Text).InnerXml.ToString();
else
textBox2.Text = xnav.SelectSingleNode(textBox1.Text).Value.ToString();
}
catch (System.Exception ex)
{
textBox2.Text = ex.Message;
textBox2.ForeColor = System.Drawing.Color.Maroon;
Xpath Program Image
I know there is multiple programs I can use like Xpath Visualizer etc but I need this to be very specific to what I'm working on so I need to have a separate box where I can add conditions.

Edit and save element to XML file using Linq

I'm trying to make a small XML editor. It loads an XML file, displays all book titles (in my example file) in a listbox. Clicking on a title displays all information about the book in a textbox. If the information should be modified, the user can click on an Edit button, and the information can now be edited in a new textbox. Finally, the changes are saved and both textboxes cleared - and, if possible, the titles from the newly updated XML file should be reloaded into the listbox (screenshot).
The listbox and first textbox operations work fine, thanks to this post.
The problem arises when I try to send the XML values to the second textbox. Either changes aren't saved or, if they are, the rest of the XML file disappears.
I suppose that a solution might consist in adding the information (and its changes) to a new XML element and then deleting the old one, but so far, and I've been trying for a while now, I simply can't figure out how to do it. It's for the same reason, and I know it's bad style, my code stops short where the problem begins. I'd be glad if someone could help me out.
My example XML:
<?xml version='1.0'?>
<!-- This file represents a fragment of a book store inventory database -->
<books>
<book genre="autobiography">
<title>The Autobiography of Benjamin Franklin</title>
<author>Franklin, Benjamin</author>
<year>1981</year>
<price>8.99</price>
</book>
<book genre="novel">
<title>The Confidence Man</title>
<author>Melville, Herman</author>
<year>1967</year>
<price>11.99</price>
</book>
<book genre="philosophy">
<title>The Gorgias</title>
<author>Plato</author>
<year>1991</year>
<price>9.99</price>
</book>
</books>
And my .cs
private void btnLoadXML_Click(object sender, EventArgs e)
{
var xmlDoc = XDocument.Load("books03.xml");
var elements = from ele in xmlDoc.Elements("books").Elements("book")
where ele != null
select ele;
bookList = elements.ToList();
foreach (var book in bookList)
{
string title = book.Element("title").Value;
listBox1.Items.Add(title);
}
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
var book = bookList[listBox1.SelectedIndex];
textBox1.Text =
"Title: " + book.Element("title").Value + Environment.NewLine +
"Author: " + book.Element("author").Value + Environment.NewLine +
"Year: " + book.Element("year").Value + Environment.NewLine +
"Price: " + book.Element("price").Value;
}
private void btnEdit_Click(object sender, EventArgs e)
{
textBox2.Visible = true;
btnSaveClose.Visible = true;
}
}

Try xml linq :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication1
{
class Program
{
const string FILENAME = #"c:\temp\test.xml";
static void Main(string[] args)
{
XDocument doc = XDocument.Load(FILENAME);
string searchName = "The Autobiography of Benjamin Franklin";
XElement book = doc.Descendants("book").Where(x => (string)x.Element("title") == searchName).FirstOrDefault();
XElement price = book.Element("price");
price.SetValue("10.00");
}
}
}

C# XDocument - Adding a Value to an existing xml

This is what i am using
private void dir_TextBox_TextChanged(object sender, EventArgs e)
{
string _DIR = dir_TextBox.Text.ToString();dir
XDocument _config = XDocument.Load(#"/ProgramData\app\appConfig.xml");
_config.Root.Element("root").Element("node1").Add(new XElement("value", _DIR));
_config.Save(#"/ProgramData\app\appConfig.xml");
}
I have an xml
<root>
<node1>
<value></value>
</node1>
</root>
and want to add
<root>
<node1>
<value>a string</value>
</node1>
</root>
I have tried several ways to do this but keep getting an error "Additional information: Object reference not set to an instance of an object."
Any help would be appreciated.
Thanks.

_config.Root has already got the "root" element.
And you have to set (update) a new value ("a string") to the existing element, "value" because your xml file already has the "value" element.
private void dir_TextBox_TextChanged(object sender, EventArgs e)
{
XDocument _config = XDocument.Load(#"/ProgramData\app\appConfig.xml");
_config.Root.Element("node1").Element("value").Value = "a string";
_config.Save(#"/ProgramData\app\appConfig.xml");
}

dynamically add values to resources (C#)

I want to add values to the resources dynamically through codings(C#). My below coding runs without any error but the values are not getting added to the resource file.
protected void Button2_Click(object sender, EventArgs e)
{
using (ResXResourceWriter resx = new ResXResourceWriter("Resources.resx"))
{
resx.AddResource( "joth", "joth");
resx.Close();
}
}

protected void Button2_Click(object sender, EventArgs e)
{
using (ResXResourceWriter resx = new ResXResourceWriter("Resources.resx"))
{ resx.AddResource( "joth", "joth");
resx.Save();
resx.Close();
}
}

I tried the above it doesn't seem to work, I looked around and try editing the resx file like a xml file and it worked for me.
<data name="v13" xml:space="preserve">
<value>Test TEst</value>
</data>
Above is the structure of a single key/value pair in the resx file opened in nodepadd ++
XDocument doc = XDocument.Load(Server.MapPath(#"~\App_GlobalResources\myResource2.resx"));
XElement data = new XElement("data");
XNamespace ns = "xml";
data.Add(new XAttribute("name", "v13"));
data.Add(new XAttribute(XNamespace.Xml + "space", "preserve"));
data.Add(new XElement("value", "Test TEst"));
doc.Element("root").Add(data);
doc.Save(Server.MapPath(#"~\App_GlobalResources\myResource2.resx"));

textbox value to be stored into a new node in xml file

i have a textbox for users to enter their new email address. they will click the "Update" button and this text that they entered will then create a new entry in an existing XML file. this xml file is used to populate 2 dropdownlist and needs to constantly update the dropdownlist with new updated entries that user entered.
i tried the following code snipper but i am weak at methods.. so please guide me
xml file: (eg i want a new builder entry)
<?xml version="1.0" encoding="utf-8"?>
<email>
<builderemail>
<builder>
<id>1</id>
<value>builder#xyz.com</value>
</builder>
<builder>
<id>2</id>
<value>Others</value>
</builder>
</builderemail>
<manageremail>
<manager>
<id>1</id>
<value>manager#xyz.com</value>
</manager>
<manager>
<id>2</id>
<value>Others</value>
</manager>
</manageremail>
</email>
so upon this button click i call the method AddNodeToXMLFile
protected void Button1_Click(object sender, EventArgs e)
{
AddNodeToXMLFile("~/App_Data/builderemail.xml", email);
}
public void AddNodeToXMLFile(string XmlFilePath, string NodeNameToAddTo)
{
//create new instance of XmlDocument
XmlDocument doc = new XmlDocument();
//load from file
doc.Load(XmlFilePath);
//create main node
XmlNode node = doc.CreateNode(XmlNodeType.Element, "builder", null);
//create the nodes first child
XmlNode ButtonName = doc.CreateElement("id");
//set the value
ButtonName.InnerText = "1";
//create the nodes second child
XmlNode url = doc.CreateElement("value");
//set the value
url.InnerText = "" + TextBox1.Text;
// add childes to father
node.AppendChild(id);
node.AppendChild(value);
// find the node we want to add the new node to
XmlNodeList l = doc.GetElementsByTagName(NodeNameToAddTo);
// append the new node
l[0].AppendChild(node);
// save the file
doc.Save(XmlFilePath);
}
i think there is something wrong with my code..many thanks for your help

You should write:
// add children to father
node.AppendChild(ButtonName);
node.AppendChild(url);
and you should check if your xmlnodelist contains any nodes to prevent exceptions:
if (l.Count > 0)
{
// append the new node
l[0].AppendChild(node);
}
For the rest it looks alright to me. Good luck!