I try to make a comment page, and i used a XML log to store the data.

But the script makes 2 equal comment in the log file.

Can anybody see what is wrong?

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net;
using System.Net.Mail;
using System.Net.Configuration;
using System.Text.RegularExpressions;
using System.Configuration;
using System.Web.Configuration;
using System.Xml;
using System.Text;
using System.IO;
using umbraco;
using umbraco.presentation.nodeFactory;

namespace umbracowebsitewizard_site.Usercontrols {
public partial class ContactForm : System.Web.UI.UserControl {
public void btnSubmit_Click(object sender, EventArgs e) {
if (!Page.IsValid) { return; }

string strName, strMessage;
strName = name.Text;
strMessage = message.Text;
int document = umbraco.presentation.nodeFactory.Node.GetCurrent().Id;

string strEmailFrom, strEmailTo, strEmailSubject, strEmailBody, strTime, strDate;
strEmailFrom = emailAddress.Text;
strEmailTo = "[email protected]";
strEmailSubject = "Kommentar tilføjet til" + document;
strTime = String.Format("{0:HH:mm:ss}", DateTime.Now);
strDate = String.Format("{0:dd/MM/yyyy}", DateTime.Now);

strEmailBody = "Der er kommen en kommentar til dit din side fra:" + Environment.NewLine + "Navn: " + strName + "." + Environment.NewLine + "Tidspunkt: " + strDate + " " + strTime + Environment.NewLine + ".Email: " + strEmailFrom + "." + Environment.NewLine + "Meddelelse: " + strMessage;

SmtpClient mySMTPClient = new SmtpClient();

try {
mySMTPClient.Send(strEmailFrom, strEmailTo, strEmailSubject, strEmailBody);
}
catch (SmtpException ex) {
errorMessage.Text = ex.Message;
ErrorMailSettings.Visible = true;
FormFields.Visible = true;
return;
}

string filePath = Server.MapPath("~/log_files/comment_" + document + ".xml");

if (!File.Exists(filePath)) {
XmlTextWriter writer = new XmlTextWriter(filePath, Encoding.UTF8);
writer.Formatting = Formatting.Indented;
writer.WriteStartDocument();
writer.WriteStartElement("logs");
writer.WriteStartElement("log");
writer.WriteAttributeString("time", strTime);
writer.WriteAttributeString("date", strDate);
writer.WriteAttributeString("accepted", "false");

writer.WriteStartElement("field");
writer.WriteAttributeString("alias", "name");
writer.WriteString(strName);
writer.WriteEndElement();

writer.WriteStartElement("field");
writer.WriteAttributeString("alias", "email");
writer.WriteString(strEmailFrom);
writer.WriteEndElement();

writer.WriteStartElement("field");
writer.WriteAttributeString("alias", "message");
writer.WriteCData(strMessage);
writer.WriteEndElement();

writer.WriteEndElement();
writer.WriteEndDocument();
writer.Close();
} else {
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(filePath);
XmlElement logNode = xmlDoc.CreateElement("log");
logNode.SetAttribute("time", strTime);
logNode.SetAttribute("date", strDate);
logNode.SetAttribute("accepted", "false");

XmlElement fieldNodeName = xmlDoc.CreateElement("field");
fieldNodeName.SetAttribute("alias", "name");
fieldNodeName.InnerText = strName;
logNode.AppendChild(fieldNodeName);

XmlElement fieldNodeEmail = xmlDoc.CreateElement("field");
fieldNodeEmail.SetAttribute("alias", "email");
fieldNodeEmail.InnerText = strEmailFrom;
logNode.AppendChild(fieldNodeEmail);

XmlElement fieldNodeMessage = xmlDoc.CreateElement("field");
fieldNodeMessage.SetAttribute("alias", "message");
XmlCDataSection fieldNodeCData = xmlDoc.CreateCDataSection(strMessage);
fieldNodeMessage.AppendChild(fieldNodeCData);
logNode.AppendChild(fieldNodeMessage);

xmlDoc.SelectSingleNode("/logs").AppendChild(logNode);
xmlDoc.Save(filePath);
}

FormFields.Visible = false;
ErrorMailSettings.Visible = false;
ThankYou.Visible = true;
}

protected void RequiredName_ServerValidate(object source, ServerValidateEventArgs args) { if (name.Text == String.Empty) { name.CssClass = "error"; args.IsValid = false; }else{ name.CssClass = ""; args.IsValid = true;}}
protected void RequiredEmailAddress_ServerValidate(object source, ServerValidateEventArgs args) {if (emailAddress.Text == String.Empty) {emailAddress.CssClass = "error";args.IsValid = false;}else{emailAddress.CssClass = "";args.IsValid = true;}}
protected void RequiredMessage_ServerValidate(object source, ServerValidateEventArgs args) {if (message.Text == String.Empty) {message.CssClass = "error";args.IsValid = false;}else{message.CssClass = "";args.IsValid = true;}}
protected void CheckEmailAddress_ServerValidate(object source, ServerValidateEventArgs args) {Regex reg = new Regex(@"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*");if (!reg.IsMatch(emailAddress.Text)) {emailAddress.CssClass = "error";args.IsValid = false;} else {emailAddress.CssClass = "";args.IsValid = true;}}
}
}