Add new data to existing xml file

Question

I am writing an xml file from the employee class. Now I want to add a new employee entry to an existing xml file. How can i do this?

Now click the "I want to add a new employee entry in XML" button.

----- Xml file ----

<?xml version="1.0" encoding="utf-8"?> <metadata> <Employee ID="1" firstName="Usman" lastName="Shahzad" Salary="1000" /> <Employee ID="2" firstName="Mubasshir" lastName="Aashiq" Salary="1001" /> <Employee ID="3" firstName="Ishitiaq" lastName="Ch." Salary="1002" /> </metadata> 

----- The code is behind -----

  private void btnGet_Click(object sender, EventArgs e) { Employee[] employees = new Employee[3]; employees[0] = new Employee(1, "Usman", "Shahzad", 1000); employees[1] = new Employee(2, "Mubasshir", "Aashiq", 1001); employees[2] = new Employee(3, "Ishitiaq", "Ch.", 1002); XmlWriterSettings settings = new XmlWriterSettings(); settings.Indent = true; string filename = @"Users\text1.xml"; Directory.CreateDirectory(Path.GetDirectoryName(filename)); using (XmlWriter xmlWriter = XmlWriter.Create(filename, settings)) { xmlWriter.WriteStartDocument(); xmlWriter.WriteStartElement("metadata"); foreach (Employee a in employees) { xmlWriter.WriteStartElement("Employee"); xmlWriter.WriteAttributeString("ID", Convert.ToString(a.Id)); xmlWriter.WriteAttributeString("firstName", Convert.ToString(a.FirstName)); xmlWriter.WriteAttributeString("lastName", Convert.ToString(a.LastName)); xmlWriter.WriteAttributeString("Salary", Convert.ToString(a.Salary)); xmlWriter.WriteEndElement(); } xmlWriter.WriteEndElement(); } DialogResult dr = MessageBox.Show("XML file creation Done\nDo you want to load it into grid view?", "Testing", MessageBoxButtons.OKCancel, MessageBoxIcon.Information); if (dr == DialogResult.OK) { ds.ReadXml(@"Users\text1.xml"); dataGridView1.DataSource = ds.Tables[0]; } else return; } class Employee { Int32 _id; string _firstName; string _lastName; Int32 _salary; public Employee(Int32 id, string firstName, string lastName, Int32 salary) { this._id = id; this._firstName = firstName; this._lastName = lastName; this._salary = salary; } public Int32 Id { get { return _id; } } public string FirstName { get { return _firstName; } } public string LastName { get { return _lastName; } } public Int32 Salary { get { return _salary; } } } 

Answer 1

There you go:

 XDocument xdoc = XDocument.Load(path_to_xml); xdoc.Element("metadata").Add( new XElement("Employee", new XAttribute("ID", Convert.ToString(Employee.Id)), new XAttribute("firstName", Convert.ToString(Employee.FirstName)), new XAttribute("lastName", Convert.ToString(Employee.LastName)), new XAttribute("Salary", Convert.ToString(Employee.Salary)) )); xdoc.Save(path_to_xml);