private void btnAddCustomers_Click(object sender, EventArgs e)
{
addCustomer = new AddCustomers();
//Passing form name to identify already opened form to keep using of one form,
//reference to object and type of form to switch between Add and Edit form view and behavior
openWindow("AddCustomers", ref addCustomer, "Add");
//Set customer ID to update customer information in the form
addCustomer.setID(-1);
}
private void btnEditCustomers_Click(object sender, EventArgs e)
{
//Customer id in database
int id;
int.TryParse(dgvCustomers.Rows[dgvCustomers.SelectedRows[0].Index].Cells[0].Value.ToString(), out id);
addCustomer = new AddCustomers();
openWindow("AddCustomers", ref addCustomer, "Edit");
addCustomer.setID(id);
}