public Department_Data(List <Backend.Department> DDB)
{
DB = DDB;
emartDataContext = new EmartDataContext();
}
public Department_Data()
{
DB = new List <Backend.Department>();
DB.Add(new Backend.Department("defult", "0"));//defult department, only in use when removing departmetnt in exsisting object
emartDataContext = new EmartDataContext();
}