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(); } }
private void BtnAddSave_Click(object sender, EventArgs e) { if (btnAddSave.Text == "Add") { ReadOnlyInputs(false); dtpDate.Enabled = true; btnAddSave.Text = "Save"; btnRemove.Text = "Cancel"; cboInvoice.Text = string.Empty; txtCustID.Clear(); txtAmount.Clear(); cboInvoice.Focus(); } else { try { btnRemove.Text = "Remove"; if (txtCustID.Text != string.Empty && txtAmount.Text != string.Empty && cboInvoice.Text != string.Empty && dtpDate.Text != string.Empty) { Invoice newInvoice = new Invoice(); newInvoice.number = int.Parse(cboInvoice.Text); newInvoice.custID = int.Parse(txtCustID.Text); newInvoice.date = dtpDate.Value; newInvoice.salesAmount = double.Parse(txtAmount.Text); anInvoiceCollection.AddInvoice(newInvoice); FillCombo(); cboInvoice.Text = string.Empty; txtCustID.Text = string.Empty; txtAmount.Text = string.Empty; ReadOnlyInputs(true); dtpDate.Enabled = true; btnAddSave.Text = "Add"; } else { MessageBox.Show("Data missing", "Error"); btnAddSave.Text = "Save"; btnRemove.Text = "Cancel"; } } catch { MessageBox.Show("Duplicate number", "Error"); btnAddSave.Text = "Save"; btnRemove.Text = "Cancel"; } } }