public void DeleteUnit(long hostingUnitKey)
{
HostingUnit certianUnit = FindUnitByKey(hostingUnitKey);
var allOrders = GetAllOrders();
foreach (var item in GetAllOrders())
{
if ((item.Status == OrderStatus.MailSend ||
item.Status == OrderStatus.NotYetHandle) &&
item.HostingUnitKey == hostingUnitKey)
{
throw new ArgumentException("can't delete, their is still open order");
}
}
try
{
dal.DeleteUnit(certianUnit);
}
catch (Exception exc) //catch 2 tipes of exceptions.
{
if (exc is KeyNotFoundException)
{
throw exc;
}
if (exc is ArgumentNullException)
{
throw new ArgumentNullException("The key exists, /n Unable to find content by key");
}
else
{
throw exc;
}
}
}