/// <summary>
        /// 修改按钮点击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            frmEditTeaInfo fetInfo2 = new frmEditTeaInfo();

            //获取第一列也就是教师的编号
            fetInfo2.TeacherID = Convert.ToInt32(dgvTeacher.CurrentRow.Cells[0].Value);
            fetInfo2.ShowDialog();
            //重新绑定DataGridView
            this.FillTeacherInfo();
        }
        /// <summary>
        /// 添加按钮点击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            frmEditTeaInfo fetInfo = new frmEditTeaInfo();

            //表示新增
            fetInfo.TeacherID = 0;
            fetInfo.ShowDialog();
            //再次绑定dgvTeaInfo
            this.FillTeacherInfo();
        }