public string GetExerciseData(int CourseID, string tagName, string selectedValue)
        {
            var Exercisedata = this.HWFilerepository.GetAll().Where(x => x.Course_ID == CourseID);
            int i            = 0;
            Dictionary <string, string> optionData = new Dictionary <string, string>();
            string keyText = string.Empty;

            foreach (var item in Exercisedata)
            {
                if (item.HW_Exam_Number.Contains("Exercise"))
                {
                    keyText = string.Concat(item.HW_Exam_Number);
                    if (optionData.Keys.Where(x => x == keyText).Count().Equals(0))
                    {
                        optionData.Add(keyText, i.ToString());
                        i += 1;
                    }
                }
            }
            if (string.IsNullOrWhiteSpace(tagName))
            {
                tagName = "ClassName";
            }
            string _html = DropDownListHelper.GetDropdownList(tagName, optionData, selectedValue, null, true, "選擇要批改之作業");

            return(_html);
        }
        public string GetTypes(int CourseID, string tagName, string selectedValue)
        {
            List <SelectListItem> HWorExerList = new List <SelectListItem>();

            HWorExerList.AddRange(new[] {
                new SelectListItem()
                {
                    Text = "HW_Exam", Value = "HW_Exam", Selected = false
                },
                new SelectListItem()
                {
                    Text = "Exercise", Value = "Exercise", Selected = false
                }
            });
            var Typedata = HWorExerList;
            int i        = 0;
            Dictionary <string, string> optionData = new Dictionary <string, string>();
            string keyText = string.Empty;

            foreach (var item in Typedata)
            {
                keyText = string.Concat(item.Value.Trim());
                if (optionData.Keys.Where(x => x == keyText).Count().Equals(0))
                {
                    optionData.Add(keyText, i.ToString());
                    i += 1;
                }
            }
            if (string.IsNullOrWhiteSpace(tagName))
            {
                tagName = "assignmentType";
            }
            string _html = DropDownListHelper.GetDropdownList(tagName, optionData, selectedValue, null, true, "選擇類型");

            return(_html);
        }