private void btnAdd_Click(object sender, EventArgs e)
        {
            isUpdate = false;

            FrmAddWorkoutLog frm = new FrmAddWorkoutLog(this);

            frm.TopLevel   = false;
            frm.AutoScroll = true;
            this.Controls.Add(frm);
            frm.FormBorderStyle = FormBorderStyle.None;
            frm.Show();
        }
        private void btnEdit_Click(object sender, EventArgs e)
        {
            if (dto.EditTime.Date != DateTime.Now.Date)
            {
                MessageBox.Show($"此紀錄的日期為{dto.EditTime.Date:yyyy/MM/dd}\n只能修改今天({DateTime.Now.Date:yyyy/MM/dd})的紀錄");
                return;
            }

            isUpdate = true;

            FrmAddWorkoutLog frm = new FrmAddWorkoutLog(this);

            frm.TopLevel   = false;
            frm.AutoScroll = true;
            this.Controls.Add(frm);
            frm.FormBorderStyle = FormBorderStyle.None;
            frm.Show();
        }