/// <summary>
/// Clicking button checks if all fields have plausible entires (not empty or wrong format). Then
/// updates currently selected customer with new information. Uses email as unique identifier, but
/// does not check if email already exists. (Not sure how...)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SaveButton_Click(object sender, EventArgs e)
{
bool valid = true; // Boolean will be set to false if any tests fail, used to check if customer should be saved.
if (FirstNameBox.Text == "" || !Regex.IsMatch(FirstNameBox.Text, name))
{
MessageBox.Show("Please enter your first name", "First name is a required field");
FirstNameBox.Focus();
valid = false;
}
if (LastNameBox.Text == "" || !Regex.IsMatch(LastNameBox.Text, name))
{
MessageBox.Show("Please enter your last name", "Last name is a required field");
LastNameBox.Focus();
valid = false;
}
if (AddressBox.Text == "" || !Regex.IsMatch(AddressBox.Text, address))
{
MessageBox.Show("Please enter your address", "Address is a required field");
AddressBox.Focus();
valid = false;
}
if (CityBox.Text == "" || !Regex.IsMatch(CityBox.Text, city))
{
MessageBox.Show("Please enter your city", "City is a required field");
CityBox.Focus();
valid = false;
}
if (StateBox.Text == "" || !Regex.IsMatch(StateBox.Text, name))
{
MessageBox.Show("Please enter your state", "State is a required field");
StateBox.Focus();
valid = false;
}
if (ZipBox.Text == "" || !Regex.IsMatch(ZipBox.Text, zip))
{
MessageBox.Show("Please enter your zip code", "Zip Code is a required field");
ZipBox.Focus();
valid = false;
}
if (PhoneBox.Text == "" || !Regex.IsMatch(PhoneBox.Text, phone))
{
MessageBox.Show("Please enter your phone number", "Phone number is a required field");
PhoneBox.Focus();
valid = false;
}
if (EmailBox.Text == "" || !Regex.IsMatch(EmailBox.Text, email))
{
MessageBox.Show("Please enter your email address", "Email is a required field");
EmailBox.Focus();
valid = false;
}
// If invalid entry, do not save.
if (!valid)
{
return;
}
// Else
string ConnectionString = "server=localhost;user=root;database=book store;password="******"Insert into customer values" +
$"('null','{FirstNameBox.Text}'," +
$"'{LastNameBox.Text}'," +
$"'{AddressBox.Text}'," +
$"'{CityBox.Text}'," +
$"'{StateBox.Text}'," +
$"'{ZipBox.Text}'," +
$"'{PhoneBox.Text}'," +
$"'{EmailBox.Text}')";
cmd.Connection = DBConnect;
cmd.ExecuteNonQuery();
DBConnect.Close();
FirstNameBox.Clear();
LastNameBox.Clear();
AddressBox.Clear();
CityBox.Clear();
StateBox.Clear();
ZipBox.Clear();
PhoneBox.Clear();
EmailBox.Clear();
// Call function to update the combobox with new customer added.
CustomerSelectBox_Click(sender, e);
CustomerSelectBox.Enabled = true;
SaveButton.Enabled = false;
MessageBox.Show("Customer added to database.");
return;
}
// Else update the currently selected customer with textbox info
// Extract first and last name into string array.
string[] custName = new string[2];
custName = CustomerSelectBox.Text.Split();
cmd.CommandText = $"Update customer set" +
$" first='{FirstNameBox.Text}'," +
$"last='{LastNameBox.Text}'," +
$"address='{AddressBox.Text}'," +
$"city='{CityBox.Text}'," +
$"state='{StateBox.Text}'," +
$"zip='{ZipBox.Text}'," +
$"phone='{PhoneBox.Text}'," +
$"email='{EmailBox.Text}'" +
$" where first='{custName[0]}' AND last ='{custName[1]}'";
cmd.Connection = DBConnect;
cmd.ExecuteNonQuery();
DBConnect.Close();
MessageBox.Show("Customer successfully updated.");
return;
/*
* SaveButton.Enabled = false; // Disable the save button again until new customer is selected from the comboBox.
*
* // Rewrite the entire file, omitting the line with the email of the customer that is being updated, since email is unique.
* // SRC: https://stackoverflow.com/questions/10371630/c-sharp-text-file-search-for-specific-word-and-delete-whole-line-of-text-that-co
* Customer tempCustomer = (Customer)(CustomerSelectBox.SelectedItem);
* var oldLines = File.ReadAllLines("customers.txt");
* var newLines = oldLines.Where(line => !line.Contains(tempCustomer.email));
* File.WriteAllLines("customers.txt", newLines);
*
* customers.Remove((Customer)CustomerSelectBox.SelectedItem); // Remove old customer info from customer list.
*
* // Add new info to list.
* tempCustomer = new Customer(FirstNameBox.Text, LastNameBox.Text, AddressBox.Text, CityBox.Text, StateBox.Text, ZipBox.Text, PhoneBox.Text, EmailBox.Text);
* customers.Add(tempCustomer);
*
* // Close reader and inFile even if exception is thrown.
* // SRC:https://stackoverflow.com/questions/86766/how-to-properly-handle-exceptions-when-performing-file-io
* try
* {
* using (FileStream outFile = new FileStream("customers.txt", FileMode.Append, FileAccess.Write))
* using (StreamWriter writer = new StreamWriter(outFile))
* {
* // Write info to file.
* writer.WriteLine($"{FirstNameBox.Text},{LastNameBox.Text},{AddressBox.Text},{CityBox.Text},{StateBox.Text},{ZipBox.Text},{PhoneBox.Text},{EmailBox.Text}");
* }
*
* // Clear Text Boxes.
* FirstNameBox.Clear();
* LastNameBox.Clear();
* AddressBox.Clear();
* CityBox.Clear();
* StateBox.Clear();
* ZipBox.Clear();
* PhoneBox.Clear();
* EmailBox.Clear();
*
* // Update comboBox with new info.
* CustomerSelectBox.Items.Remove(CustomerSelectBox.SelectedItem);
* CustomerSelectBox.Items.Add(tempCustomer);
* }
* catch (FileNotFoundException)
* {
* MessageBox.Show("File 'customers.txt' not found to write.", "File Write Error");
* }
* // Catch generic I/O exceptions.
* catch (IOException ex)
* {
* MessageBox.Show(ex.ToString(), "Error");
* }
*/
}
private void Window_Activated(object sender, EventArgs e)
{
FirstNameBox.Focus();
}