private void btnAdd_Click(object sender, EventArgs e)
{
if (IsValidData()) //validate all data before saving
{
salesperson = new Salesperson(txtName.Text,
Convert.ToInt32(txtAgencyID.Text),
Convert.ToDouble(txtCommission.Text),
Convert.ToDecimal(txtSalesAmount.Text));
this.Close();
}
}
private static string path = @"Salespeople.xml"; // this uses the project file
#endregion Fields
#region Methods
//a method that will retrieve Salesperson data and populate the lsitbox
public static List<Salesperson> GetSalesperson()
{
//declare a new list to hold the data
List<Salesperson> salespeople = new List<Salesperson>();
//use XmlReader - lets you run through the XML content one element at a time
//create a new XmlReaderSettings object
XmlReaderSettings settings = new XmlReaderSettings();
XmlReader xmlRead = null;
try
{
//check if file exists or not
//create it if it doesnt exist
XmlDocument xDoc = new XmlDocument();
if (!File.Exists("Salespeople.xml"))
//if no file yet exists than return an empty salespeople list
{ MessageBox.Show("New file for Salespeople: \""+ path + "\", will be created!");
return salespeople;
}
//create a new XmlReader object
//input our path and settings as arguments
settings.IgnoreWhitespace = true;
settings.IgnoreComments = true;
xmlRead = XmlReader.Create(path, settings);
//read past everything to the Salesperson node
if (xmlRead.ReadToDescendant("Salesperson"))
{
do
{
//create a new instance of a salesperson
Salesperson salesperson = new Salesperson();
//get the salesperson attribute "Name" and assign it to the salesperson.Name property
salesperson.Name = xmlRead["Name"];
//ReadStartElement - Checks that the current node is an element and advances the reader to the next node.
xmlRead.ReadStartElement("Salesperson");
//read the element values an assign them to other salesperson properties
salesperson.AgencyID = xmlRead.ReadElementContentAsInt();
salesperson.Commission = xmlRead.ReadElementContentAsDouble();
salesperson.SalesAmount = xmlRead.ReadElementContentAsDecimal();
//add the resulting salesperson object to the list of salespeople
salespeople.Add(salesperson);
}
while (xmlRead.ReadToNextSibling("Salesperson"));
//keeps looping as long as the enxt element is a Salesperson one
}
// close the XmlReader object
// xmlRead.Close();
}
catch (FileNotFoundException ex)
{
throw ex;
}
catch (IOException ex)
{
throw ex;
}
catch (FormatException fex)
{
throw fex;
}
catch (XmlException ex)
{
throw ex;
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (xmlRead != null) //prevents NullPointerException
{
xmlRead.Close();
}
}
//return the resulting list of salespeople
return salespeople;
}
