public Volunteer_detail(int Volunteer_no)
        {
            InitializeComponent();

            Volunteer_ViewModel volunteer_ViewModel = new Volunteer_ViewModel();

            volunteer_ViewModel.SelectVolunteer_byVolunteerno(Volunteer_no);

            this.Chinese_name_Label.Content      = volunteer_ViewModel.Chinese_name;
            this.English_name_Label.Content      = volunteer_ViewModel.English_name;
            this.Sex_Label.Content               = volunteer_ViewModel.Sex;
            this.Birthday_Label.Content          = volunteer_ViewModel.Birthday;
            this.IDcrad_Label.Content            = volunteer_ViewModel.IDcrad_no;
            this.Medical_record_no_Label.Content = volunteer_ViewModel.Medical_record_no;
            this.Identity_type_Label.Content     = volunteer_ViewModel.Identity_type;
            this.Seniority_Label.Content         = volunteer_ViewModel.Seniority;
            this.Join_date_Label.Content         = volunteer_ViewModel.Join_date;
            this.Leave_date_Label.Content        = volunteer_ViewModel.Leave_date;
            this.Leave_reason_Label.Content      = volunteer_ViewModel.Leave_reason;
            this.Phone_no_Label.Content          = volunteer_ViewModel.Phone_no;
            this.Mobile_no_Label.Content         = volunteer_ViewModel.Mobile_no;
            this.Vest_no_Label.Content           = volunteer_ViewModel.Vest_no;
            this.Postal_code_Label.Content       = volunteer_ViewModel.Postal_code;
            this.Address_Label.Content           = volunteer_ViewModel.Address;
            this.Education_Label.Content         = volunteer_ViewModel.Education;
            this.Lssuing_unit_Label.Content      = volunteer_ViewModel.Lssuing_unit;
            this.Service_manual_no_Label.Content = volunteer_ViewModel.Service_manual_no;
            this.Personality_scale_Label.Content = volunteer_ViewModel.Personality_scale;
            this.Photo.Source = volunteer_ViewModel.Photo;
            this.Leader_list_Label.Content   = volunteer_ViewModel.Leader_list;
            this.Experise_list_Label.Content = volunteer_ViewModel.Experise_list;

            ObservableCollection <Activity_list> activity_list = new ObservableCollection <Activity_list>();
            Activity_ViewModel        activity_ViewModel       = new Activity_ViewModel();
            List <Activity_ViewModel> activity_ViewModel_list  = activity_ViewModel.SelectVolunteer_ActivitybyVolunteerno(Volunteer_no);

            foreach (var row in activity_ViewModel_list)
            {
                activity_list.Add(new Activity_list()
                {
                    活動編號 = row.Activity_no, 活動名稱 = row.Activity_name, 活動承辦人 = row.Undertaker
                });
            }

            Activity_datagrid.ItemsSource = activity_list;
        }