老师您好：
给我翻译一下 提交试卷 这段代码每条语句的汉语意思与它的作用，我弄不清楚它们的来龙去脉。尽可能详细的。老师先谢谢你们。
  //=========================提交试卷===========================
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        //try
        //{
            Label3.Visible = Label4.Visible = Label7.Visible = Label8.Visible = Label9.Visible = Label10.Visible = true;
            this.lblStuID.Text = Session["StuName"].ToString();
            this.lblSubject.Text = Session["SelLession"].ToString();
            this.lblQuestion.Text = Session["SelTitle"].ToString();
            this.getCom(3);
            this.getCom(4);
            this.lblTotal.Text = Convert.ToString(int_row1Point + int_row2Point);
            dataconn.eccom("insert into tb_StuResult"
                     + "(stu_id,which_lesson,taotiid,taotiname,res_single,res_more)"
                     + "values('" + lblStuID.Text + "','" + lblSubject.Text + "',"
                     + Application["d2"].ToString() + ",'" + lblQuestion.Text + "'," + int_row1Point + "," + int_row2Point + ")");
            this.getCom(5);
            Response.Write("<script lanuage=javascript>alert('您确定要交卷吗？');localtion='StartExamfra.aspx';</script>");