/// <summary>
        /// 修改点击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            frmEditStuInfo fesInfo2 = new frmEditStuInfo();

            //获取第一列也就是学生的编号
            fesInfo2.StudentID = Convert.ToInt32(dgvStudent.CurrentRow.Cells[0].Value);
            fesInfo2.ShowDialog();
            //重新绑定DataGridView
            this.FillStudentInfo();
        }
        /// <summary>
        /// 添加学生信息事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            frmEditStuInfo fesInfo = new frmEditStuInfo();

            //表示新增
            fesInfo.StudentID = 0;
            fesInfo.ShowDialog();
            //再次绑定dgvStuInfo
            this.FillStudentInfo();
        }