public static void ListCustomers()
{
Console.Clear();
string conString = "Data Source=DESKTOP-MJA5A7T;Initial Catalog=Car Rent;Integrated Security=True";
SqlConnection con = new SqlConnection(conString);
con.Open();
SqlDataAdapter dataAdapter = new SqlDataAdapter("select * from Customers", con);
DataTable dt = new DataTable();
dataAdapter.Fill(dt);
DisplayListCustomers(dt);
int column = 0;
int prevColumn = 0;
while (true)
{
column = int.Parse(Console.ReadLine());
if (column == prevColumn)
{
switch (column)
{
case 1:
dt = OrderBy.OrderByCustomerIdDesc(dt);
break;
case 2:
dt = OrderBy.OrderByNameDesc(dt);
break;
case 3:
dt = OrderBy.OrderByBirthDateDesc(dt);
break;
case 4:
dt = OrderBy.OrderByLocationDesc(dt);
break;
}
}
else
{
switch (column)
{
case 1:
dt = OrderBy.OrderByCustomerId(dt);
break;
case 2:
dt = OrderBy.OrderByName(dt);
break;
case 3:
dt = OrderBy.OrderByBirthDate(dt);
break;
case 4:
dt = OrderBy.OrderByLocation(dt);
break;
default:
dt = OrderBy.OrderByCustomerId(dt);
break;
}
}
prevColumn = column;
DisplayListCustomers(dt);
}
}