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POXMLDocument: Root element is missing
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  1. POXMLDocument: Root element is missing
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    copied!<p>I'm working on a program to manage all customers we have in our company. I want to use an XML file to save the customers. So I create an XML file (if not existing) and fill it with elements. Here you can see how I do:</p> <pre><code>string path = "C:\\Users\\Römel\\Desktop\\Save"; List&lt;Kunde&gt; kunde = new List&lt;Kunde&gt;(); private void Form1_Load(object sender, EventArgs e) { XmlDocument xdocument = new XmlDocument(); xdocument.Load(path + "\\save.xml"); foreach (XmlNode xnode in xdocument.SelectNodes("Kundenverwaltung/Kunde")) { Kunde k = new Kunde(); k.KundenNr = xnode.SelectSingleNode("KundenNr").InnerText; k.Nachname = xnode.SelectSingleNode("Nachname").InnerText; k.Vorname = xnode.SelectSingleNode("Vorname").InnerText; k.Adresse = xnode.SelectSingleNode("Adresse").InnerText; k.Ort = xnode.SelectSingleNode("Ort").InnerText; k.Telefon = xnode.SelectSingleNode("Telefon").InnerText; k.Mail = xnode.SelectSingleNode("Mail").InnerText; kunde.Add(k); listViewKunden.Items.Add(k.Nachname + " " + k.Vorname); } } private void btnAddCustomer_Click(object sender, EventArgs e) { if(!Directory.Exists(path)) { Directory.CreateDirectory(path); } if (!File.Exists(path + "\\save.xml")) { XmlTextWriter xwriter = new XmlTextWriter(path + "\\save.xml", Encoding.UTF8); xwriter.WriteStartElement("Kundenverwaltung"); xwriter.WriteEndElement(); xwriter.Close(); } Kunde k = new Kunde(); k.KundenNr = txtKundenNr.Text; k.Nachname = txtKundeNachname.Text; k.Vorname = txtKundeVorname.Text; k.Adresse = txtKundeAdresse.Text; k.Ort = txtKundeOrt.Text; k.Telefon = txtKundeTel.Text; k.Mail = txtKundeMail.Text; kunde.Add(k); listViewKunden.Items.Add(k.Nachname + " " + k.Vorname); txtKundenNr.Text = ""; txtKundeNachname.Text = ""; txtKundeVorname.Text = ""; txtKundeAdresse.Text = ""; txtKundeOrt.Text = ""; txtKundeTel.Text = ""; txtKundeMail.Text = ""; } private void Form1_FormClosing(object sender, FormClosingEventArgs e) { XmlDocument xdoc = new XmlDocument(); xdoc.Load(path + "\\save.xml"); XmlNode xnode = xdoc.SelectSingleNode("Kundenverwaltung"); xnode.RemoveAll(); foreach (Kunde k in kunde) { XmlNode xtop = xdoc.CreateElement("Kunde"); XmlNode xkundennr = xdoc.CreateElement("KundenNr"); XmlNode xnachname = xdoc.CreateElement("Nachname"); XmlNode xvorname = xdoc.CreateElement("Vorname"); XmlNode xadresse = xdoc.CreateElement("Adresse"); XmlNode xort = xdoc.CreateElement("Ort"); XmlNode xtel = xdoc.CreateElement("Telefon"); XmlNode xmail = xdoc.CreateElement("Mail"); xkundennr.InnerText = k.KundenNr; xnachname.InnerText = k.Vorname; xvorname.InnerText = k.Nachname; xadresse.InnerText = k.Adresse; xort.InnerText = k.Ort; xtel.InnerText = k.Telefon; xmail.InnerText = k.Mail; xtop.AppendChild(xkundennr); xtop.AppendChild(xnachname); xtop.AppendChild(xvorname); xtop.AppendChild(xadresse); xtop.AppendChild(xort); xtop.AppendChild(xtel); xtop.AppendChild(xmail); xdoc.DocumentElement.AppendChild(xtop); } xdoc.Save(path + "\\save.xml"); e.Cancel = false; this.Close(); } </code></pre> <p>For <code>KundenNr</code>, <code>Nachname</code> etc. I created some classes in the end of my file. I hope it's not too much code.</p> <p>First: I can't use the regular "X" button in upper right corner because there is no reaction if I hit it. So I created an <code>Exit</code> button.</p> <p>Second: Everytime I hit the Exit button for leaving the program there comes an error at this line:</p> <pre><code>private void Form1_FormClosing(object sender, FormClosingEventArgs e) { xdoc.Load(path + "\\save.xml"); } </code></pre> <p>"The root element is missing" comes up. Does someone know this error and can give me a hint?</p> <p>EDIT: For <code>btnExit_Click</code> I use this code:</p> <pre><code>private void btnExit_Click(object sender, EventArgs e) { this.Close(); } </code></pre>
 

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