//修改专业按钮
        private void btnSpecialityUpdate_Click(object sender, EventArgs e)
        {
            if (this.dgvSpeciality.RowCount == 0 || this.dgvSpeciality.CurrentRow == null)
            {
                MessageBox.Show("没有要修改的信息!", "修改提示");
                return;
            }
            //获取要修改专业的名称
            string     SpecialityName = this.dgvSpeciality.CurrentRow.Cells["SpecialityName"].Value.ToString();
            Speciality objSpeciality  = objSpecialityService.GetSpecialityBySpecialityName(SpecialityName);
            //显示修改窗体
            FrmSpecialityUpdateByBrowse objUpdateForm = new FrmSpecialityUpdateByBrowse(objSpeciality);
            DialogResult result = objUpdateForm.ShowDialog();

            //判断是否修改成功
            if (result == DialogResult.OK)
            {
                list = objSpecialityService.GetSpecialityBag();
                this.dgvSpeciality.AutoGenerateColumns = false;
                this.dgvSpeciality.DataSource          = list;
            }
        }