Question

So, below I made a code which lists my 2 items in comboBox1 by its name(Selena and Maria) on load, and when I select one of those, lets say Maria, and click on button1, it populates my 3 textboxes with Maria’s name,usn and pawd attribute values, and it looks like:
Display name: Maria
Username: mary26
Password: d4e5r

and I am happy with that part of code, because it serves my purpose.

But I am struggling with part of code which I am trying to figure out.
I created a button2, and I would like that, when I change values of Display name, Username or Password textboxes, and I click save, that it saves to right location in xml file, to Maria, and does not save it to Selena or something else.

I have tried browsing for a week now, and multiple solutions, and I couldn’t find any.

att.xml:

<database>
<item name="Selena" usn="sele22" pawd="fed47a"></item>
<item name="Maria" usn="mary26" pawd="d4e5r"></item>
<database>

myproject:

private void Form3_Load(object sender, EventArgs e)
        {
            comboBox1.Items.Clear();
            XmlTextReader reader = new XmlTextReader("att.xml");
            while (reader.Read())
            {
                if (reader.NodeType == XmlNodeType.Element)
                {
                    if (reader.Name == "item")
                    {
                        comboBox1.Items.Add(reader.GetAttribute("name"));
                    }
                }
            }

            reader.Close();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string secit = comboBox1.SelectedItem as string;
            XmlTextReader lola = new XmlTextReader("att.xml");
            while (lola.Read())
            {
                if (lola.NodeType == XmlNodeType.Element)
                {
                    string poop = lola.GetAttribute("name"); 
                    if (poop == secit) 
                    {
                        string username = lola.GetAttribute("usn"); 
                        string password = lola.GetAttribute("pawd");
                        string dispname = lola.GetAttribute("name");

                        textBox1.Text = dispname;
                        textBox2.Text = username;
                        textBox3.Text = password;

                    }
                }
            }

            lola.Close();
        }

Answer 1

You can use XmlDocument like this:

XmlDocument doc = new XmlDocument();
doc.Load("att.xml");
foreach(XmlNode item in doc.SelectNodes("//item"))
    comboBox1.Items.Add(item.Attributes["name"].Value);


void button3_Click(object sender, NotifyArgs e)
{
    XmlNode item = doc.SelectSingleNode("//item[@name='" + comboBox1.Text + "']");
    if (item == null) return;
    item.Attributes["name"].Value = textBox1.Text;
    ...
    doc.Save("att.xml");
}