private string GenRN()
{
try
{
PurchaseReturn lastReturn = return_repo.GetLast();
//PurchaseReturn lastReturn = context.PurchaseReturns.LastOrDefault();
string value = lastReturn.ReturnNumber;
string number = Regex.Match(value, "[0-9]+$").Value;
return(value.Substring(0, value.Length - number.Length) +
(long.Parse(number) + 1).ToString().PadLeft(number.Length, '0'));
}
catch (NullReferenceException e)
{
return("PRN0000001");
}
}