//添加学生
        private void ucBtnSave_BtnClick(object sender, EventArgs e)
        {
            bool b;

            if (!Check.isStudentID(txtSID.Text))
            {
                FrmTips.ShowTipsWarning(this, "学号格式不正确");
                return;
            }

            try
            {
                Student stu = new Student();
                stu.SID           = txtSID.Text;
                stu.SName         = txtSname.Text;
                stu.PassWord      = MD5Encode.GetMd5("123456"); //学生默认密码123456
                stu.SGender       = cmbGender.SelectedIndex % 2 == 0 ? "男" : "女";
                stu.Class         = cmbClass.SelectedValue.ToString();
                stu.Departments   = cmbCollege.SelectedValue.ToString();
                stu.Birthday      = Convert.ToDateTime(dtpBir.Value.ToString("yyy/MM/dd"));
                stu.AdmissionTime = Convert.ToDateTime(dtpAdm.Value.ToString("yyy/MM/dd"));
                stu.Image         = null;
                StudentBLL bll = new StudentBLL();
                b = bll.AddStudentInfo(stu);
            }
            catch (Exception)
            {
                b = false;
            }

            if (b)
            {
                FrmTips.ShowTipsSuccess(this, "添加成功");
                txtSID.Clear();
                txtSname.Clear();
                txtSID.Focus();
            }
            else
            {
                FrmTips.ShowTipsError(this, "添加失败");
            }

            //MessageBox.Show(cmbGender.SelectedValue.ToString());
            //MessageBox.Show(cmbClass.SelectedValue.ToString());
        }