public void ReadFile(InvoiceCollection invoices)
{
StreamReader infile;
char delimiter = ',';
string line;
string[] fields = new string[4]; // unnecessary assignment of value
if (File.Exists("invoices.txt"))
{
MessageBox.Show("File 'invoices.txt' exists.\n");
}
{
infile = File.OpenText("invoices.txt");
while (!infile.EndOfStream)
{
line = infile.ReadLine();
fields = line.Split(delimiter);
Invoice anInvoice = new Invoice();
anInvoice.number = int.Parse(fields[0]);
anInvoice.custID = int.Parse(fields[1]);
anInvoice.date = DateTime.Parse(fields[2]);
anInvoice.salesAmount = double.Parse(fields[3]);
invoices.AddInvoice(anInvoice);
}
infile.Close();
}
}
public void WriteFile(InvoiceCollection invoices)
{
// open StreamWriter
try
{
StreamWriter outfile = new StreamWriter("invoices.txt");
// Iterate through all invoices
try
{
foreach (Invoice anInvoice in invoices.AllInvoices)
{
string result;
result = ($"{anInvoice.number},{anInvoice.custID},");
result += (anInvoice.date.ToShortDateString());
result += ($",{anInvoice.salesAmount}");
outfile.WriteLine(result);
MessageBox.Show($"Attempting to write to file:\n{result}");
}
// Close the StreamWriter
try
{
outfile.Close();
MessageBox.Show("Wrote invoices to 'invoices.txt' file.\n");
}
catch (Exception exc)
{
MessageBox.Show(exc.Message);
}
}
catch
{
MessageBox.Show("Failed to create file");
}
}
catch (DirectoryNotFoundException exc)
{
MessageBox.Show("Invalid Directory", exc.Message);
}
catch (System.IO.IOException exc)
{
MessageBox.Show(exc.Message);
}
}
