public ActionResult ImportClassModule(HttpPostedFileBase file)
        {
            if ((file != null) && (file.ContentLength > 0) && !string.IsNullOrEmpty(file.FileName))
            {
                if (!file.FileName.EndsWith("xlsx"))
                {
                    return(Error("File import phải là .xlsx!"));
                }

                //////////////////////////////////////////////////////
                //////////////////////////////////////////////////////
                //Constant Variables for importing
                //var CURRENT_COMPANY = 3;
                var Course_NgoaiKhoa_Id = 8;
                //////////////////////////////////////////////////////
                //////////////////////////////////////////////////////

                var          center      = IoCConfig.Service <ICompanyService>().FindById(CURRENT_COMPANY);
                CourseFamily ngoaikhoa   = IoCConfig.Service <ICourseFamilyService>().FindById(Course_NgoaiKhoa_Id);
                var          reserved_fc = center.Faculties.Valid().First();

                using (var package = new ExcelPackage(file.InputStream))
                {
                    var sheets = package.Workbook.Worksheets;
                    foreach (var workSheet in sheets)
                    {
                        var noOfCol = workSheet.Dimension.End.Column;
                        var noOfRow = workSheet.Dimension.End.Row;

                        //Current Class
                        //AMMHCM
                        //var class_name = workSheet.Name.Trim();
                        //var class_name = GetCellValue(workSheet, rowIterator, (int)TKBEnum.Class);
                        //var current_class = center.Classes.Valid().FirstOrDefault(c => c.Class_Name.ToLower().Equals(class_name.ToLower()));//IoCConfig.Service<IClassService>().FindValidByCriteria(c => c.Class_Name.ToLower().Equals(class_name.ToLower()));

                        //if (IsValidModel(current_class))
                        if (true)
                        {
                            //Class_Module
                            Class_Module class_module = null;//current class_module
                            for (int rowIterator = 2; rowIterator <= noOfRow; rowIterator++)
                            {
                                try
                                {
                                    var class_name    = GetCellValue(workSheet, rowIterator, (int)TKBEnum.Class);
                                    var current_class = center.Classes.Valid().FirstOrDefault(c => c.Class_Name.ToLower().Equals(class_name.ToLower()));
                                    if (current_class == null)
                                    {
                                        continue;
                                    }

                                    var class_module_day = GetClassModuleDay(workSheet, rowIterator,
                                                                             center, current_class, ngoaikhoa);
                                    if (class_module_day == null)
                                    {
                                        continue;
                                    }

                                    //Check existed
                                    var existed = IoCConfig.Service <IClass_ModuleService>()
                                                  .FindValidByCriteria(c => c.Class_Id == current_class.Id &&
                                                                       c.Module_Id == class_module_day.Module_Id);
                                    if (existed == null)
                                    {
                                        if (class_module_day.Faculty_Id == 0)
                                        {
                                            class_module_day.Faculty_Id = reserved_fc.Id;
                                        }
                                        class_module = new Class_Module
                                        {
                                            Class_Id                   = current_class.Id,
                                            Class_Module_Day           = current_class.Class_Day,
                                            Class_Module_Hour_Start    = current_class.Class_Hour_Start,
                                            Class_Module_Hour_End      = current_class.Class_Hour_End,
                                            Class_Module_Status        = (int)ClassModuleStatusEnum.Studying,
                                            Class_Module_Date_Start    = class_module_day.Class_Module_Date_Start,
                                            Class_Module_Date_End      = class_module_day.Class_Module_Date_Start,
                                            Class_Module_Date_Exam     = class_module_day.Class_Module_Date_Start,
                                            Class_Module_DurationByDay = 0,
                                            Faculty_Id                 = class_module_day.Faculty_Id,
                                            Module_Id                  = class_module_day.Module_Id,
                                            Resource_LT_Id             = class_module_day.Resource_LT_Id,
                                            Resource_TH_Id             = class_module_day.Resource_TH_Id,
                                            Resource_Exam_Id           = class_module_day.Resource_Exam_Id,

                                            Created_Date = DateTime.Now,
                                            Status       = (int)EntityStatus.Visible,
                                        };

                                        class_module.AddStudents(current_class);
                                        class_module = IoCConfig.Service <IClass_ModuleService>().Add(class_module);
                                    }
                                    else
                                    {
                                        class_module = existed;

                                        if (class_module_day.Faculty_Id != 0)
                                        {
                                            class_module.Faculty_Id       = class_module_day.Faculty_Id;
                                            class_module.Resource_LT_Id   = class_module_day.Resource_LT_Id;
                                            class_module.Resource_TH_Id   = class_module_day.Resource_TH_Id;
                                            class_module.Resource_Exam_Id = class_module_day.Resource_Exam_Id;
                                        }
                                        else
                                        {
                                            class_module.Resource_Exam_Id = class_module_day.Resource_Exam_Id;
                                        }

                                        class_module = IoCConfig.Service <IClass_ModuleService>().Update(class_module);
                                    }

                                    //If first day
                                    if (class_module_day.Class_Module_Status == (int)ClassModuleDayStatusEnum.Studying)
                                    {
                                        var day_count = class_module_day.Class_Module_Day;
                                        if (class_module.Class_Module_Days_List.Count() >= day_count)
                                        {
                                            continue;
                                        }
                                    }
                                    else
                                    {
                                        if (class_module.Class_Module_Days_List.Any(d => d.Class_Module_Day_Status == (int)ClassModuleDayStatusEnum.Test))
                                        {
                                            continue;
                                        }
                                    }

                                    //Add new class_module_day
                                    if (class_module != null)
                                    {
                                        var date   = class_module_day.Class_Module_Date_Start;
                                        var status = (ClassModuleDayStatusEnum)class_module_day.Class_Module_Status;
                                        class_module.AddModuleDay(date, current_class, status);

                                        class_module.Class_Module_Date_End  = date;
                                        class_module.Class_Module_Date_Exam = date;
                                        class_module.Class_Module_DurationByDay++;

                                        IoCConfig.Service <IClass_ModuleService>().Update(class_module);
                                    }
                                }
                                catch (Exception ex)
                                {
                                    throw ex;
                                }
                            }
                        }
                    }

                    return(MyContent("Upload successfully!"));
                }
            }

            return(Error());
        }
        private Class_Module GetClassModuleDay(ExcelWorksheet workSheet, int rowIterator,
                                               Company center, Class current_class, CourseFamily ngoaikhoa)
        {
            Class_Module item = new Class_Module();
            var          Class_Module_Date_Start = GetCellValue_DateTime(workSheet, rowIterator, (int)TKBEnum.Date);

            if (Class_Module_Date_Start == null)
            {
                return(null);
            }
            item.Class_Module_Date_Start = Class_Module_Date_Start.Value;

            var module = GetCellValue(workSheet, rowIterator, (int)TKBEnum.Module);

            if (string.IsNullOrEmpty(module))
            {
                return(null);
            }
            module = module.ToLower();
            var module_names = module.Split("-".ToCharArray());

            if (module_names.Length != 2)
            {
                return(null);
            }
            var module_code = module_names[0].Trim();
            var module_day  = module_names[1].Trim();

            if (string.IsNullOrEmpty(module_day))
            {
                return(null);
            }

            //1. Module
            var _module = current_class.CourseFamily.Modules_List
                          .FirstOrDefault(m => m.Module_Code != null && m.Module_Code.ToLower().Equals(module_code));//IoCConfig.Service<IModuleService>().FindValidByCriteria(m => m.Module_Code != null && m.Module_Code.ToLower().Equals(module_code));

            if (!IsValidModel(_module) && ngoaikhoa != null)
            {
                _module = ngoaikhoa.Modules_List
                          .FirstOrDefault(m => m.Module_Code != null && m.Module_Code.ToLower().Equals(module_code));
            }

            if (!IsValidModel(_module))
            {
                return(null);
            }
            item.Module_Id = _module.Id;

            if (module_day != "test")
            {
                item.Class_Module_Day    = int.Parse(module_day);
                item.Class_Module_Status = (int)ClassModuleDayStatusEnum.Studying;
            }
            else
            {
                item.Class_Module_Day    = 0;
                item.Class_Module_Status = (int)ClassModuleDayStatusEnum.Test;
            }

            //2. FC
            item.Faculty_Id = 0;
            var FC_Nickname = GetCellValue(workSheet, rowIterator, (int)TKBEnum.FC);

            if (!string.IsNullOrEmpty(FC_Nickname))
            {
                var _fc = IoCConfig.Service <IFacultyService>().FindValidByCriteria(f =>
                                                                                    f.Company_Id == center.Id &&
                                                                                    f.FC_Nickname != null && f.FC_Nickname.ToLower().Equals(FC_Nickname.ToLower()));
                //center.Faculties.Valid().FirstOrDefault(f => f.FC_Nickname != null && f.FC_Nickname.ToLower().Equals(FC_Nickname.ToLower()));
                if (!IsValidModel(_fc))
                {
                    _fc = IoCConfig.Service <IFacultyService>().Add(new Faculty
                    {
                        Company_Id      = center.Id,
                        FC_Name         = FC_Nickname,
                        FC_Nickname     = FC_Nickname,
                        FC_Type         = (int)FacultyTypeEnum.PartTime,
                        FC_Gender       = (int)GenderEnum.Male,
                        FC_Birthday     = DateTime.Today,
                        FC_Salary       = 0,
                        FC_WorkingHour  = 0,
                        FC_CMND_NgayCap = DateTime.Today,

                        Status = (int)EntityStatus.Visible
                    });
                }
                item.Faculty_Id = _fc.Id;
            }

            //3. Resource
            var Resource_Name = GetCellValue(workSheet, rowIterator, (int)TKBEnum.Resource);

            if (string.IsNullOrEmpty(Resource_Name))
            {
                return(null);
            }
            var _resource = IoCConfig.Service <IResourceService>().FindValidByCriteria(r =>
                                                                                       r.Company_Id == center.Id &&
                                                                                       r.Resource_Name != null && r.Resource_Name.ToLower().Equals(Resource_Name.ToLower()));

            //center.Resources.Valid().FirstOrDefault(r => r.Resource_Name != null && r.Resource_Name.ToLower().Equals(Resource_Name.ToLower()));
            if (!IsValidModel(_resource))
            {
                _resource = IoCConfig.Service <IResourceService>().Add(new Resource
                {
                    Company_Id    = center.Id,
                    Resource_Name = Resource_Name,

                    Status = (int)EntityStatus.Visible
                });
            }
            item.Resource_LT_Id   = _resource.Id;
            item.Resource_TH_Id   = _resource.Id;
            item.Resource_Exam_Id = _resource.Id;

            return(item);
        }