private void AddButton_Click(object sender, EventArgs e)
{
const string errorMessage = "An item with this product code already exists.\n\nPlease enter a different product code.";
_connection = DB_Connect.connect();
_connection.Open();
if (IfProductExists(_connection, PCTextBox.Text))
{
MessageBox.Show(errorMessage);
PCTextBox.Clear();
PCTextBox.Focus();
}
else
{
var sqlQuery = @"INSERT INTO[Products] ([ProductCode], [ProductName], [ProductSupplier], [ProductSupplierCode], [ProductPrice], [ProductStock]) VALUES
('" + PCTextBox.Text + "', '" + PNTextBox.Text + "', '" + SNTextBox.Text + "', '" + SCTextBox.Text + "', '" + PriceTextBox.Text + "', '" + StockTextBox.Text + "')";
_command = new SqlCommand(sqlQuery, _connection);
_command.ExecuteNonQuery();
ClearText();
PCTextBox.Focus();
}
_connection.Close();
LoadData();
}
private void UpdateButton_Click(object sender, EventArgs e)
{
const string errorMessage = "An item with this product code doesn't exist.\n\nPlease enter a different product code.";
_connection = DB_Connect.connect();
_connection.Open();
if (IfProductExists(_connection, PCTextBox.Text))
{
var sqlQuery = @"UPDATE[Products] SET[ProductName] = '" + PNTextBox.Text + "', [ProductSupplier] = '" + SNTextBox.Text + "' , [ProductSupplierCode] = '" + SCTextBox.Text + "', [ProductPrice] = '" + PriceTextBox.Text + "', [ProductStock] = '" + StockTextBox.Text + "' WHERE[ProductCode] = '" + PCTextBox.Text + "'";
ClearText();
PCTextBox.Focus();
_command = new SqlCommand(sqlQuery, _connection);
_command.ExecuteNonQuery();
}
else
{
MessageBox.Show(errorMessage);
PCTextBox.Clear();
PCTextBox.Focus();
}
_connection.Close();
LoadData();
}
private void DeleteButton_Click(object sender, EventArgs e)
{
const string errorMessage = "This item does not exist!";
_connection = DB_Connect.connect();
if (IfProductExists(_connection, PCTextBox.Text))
{
_connection.Open();
var sqlQuery = @"DELETE FROM[Products] WHERE[ProductCode] = '" + PCTextBox.Text + "'";
_command = new SqlCommand(sqlQuery, _connection);
_command.ExecuteNonQuery();
_connection.Close();
}
else
{
MessageBox.Show(errorMessage);
}
ClearText();
PCTextBox.Focus();
LoadData();
}