//点击下一步的事件
private void b_next_Click_1(object sender, EventArgs e)
{
cou_id = t_id.Text.Trim();
cou_num = t_num.Text.Trim();
Add_Stu_Info a = new Add_Stu_Info(tea_id, cou_id, cou_num);
a.Show();
this.Hide();
}
private void Picture_Click_addStu(object sender, EventArgs e)
{
PictureBox p = (PictureBox)sender;
DataTable dt = teacherBll.getCourseIdAndNum(tea_id);
cou_id = dt.Rows[Convert.ToInt32(p.Name)][0].ToString();
cou_num = dt.Rows[Convert.ToInt32(p.Name)][1].ToString();
Add_Stu_Info a = new Add_Stu_Info(tea_id, cou_id, cou_num);
a.Show();
this.Hide();
}