public string RegistraionNoGneraion(Student student)
{
// RegistraionNo = <Department>-<Year>-<SerialNo>
List <string> registraionNos = studentGetway.RegistraionNoGneraion(student);
// get the serial no
string serialNo;
// if there is no registraion No at that department and at that year
if (!registraionNos.Any())
{
serialNo = "000";
}
else
{
// Extract the last 3 substring and convert them to int And Make the list again in integer form
List <int> serialNoOfRegistraionNo = new List <int>();
foreach (var regNo in registraionNos)
{
string serialNoStringFormate = regNo.Substring(regNo.Length - 3);
int serialNoIntFormate = int.Parse(serialNoStringFormate);
serialNoOfRegistraionNo.Add(serialNoIntFormate);
}
// get the max serial no and convert it into 000 3 digit format
serialNo = (serialNoOfRegistraionNo.Max() + 1).ToString("000");
}
// get the department code
DepartmentGetway departmentGetway = new DepartmentGetway();
string code = departmentGetway.RegistraionNoGeneraion(student.DeptId);
// get the year form date
string year = student.Date.Year.ToString();
// Finally generate the registraion No
return(code + "-" + year + "-" + serialNo);
}