protected void Btn_Edit_Click(object sender, EventArgs e)
        {
            string ImgPath   = FileUpload1.PostedFile.FileName;//获得文件名及路径
            string ImgName   = ImgPath.Substring(ImgPath.LastIndexOf("\\") + 1);
            string ImgExtend = ImgPath.Substring(ImgPath.LastIndexOf(".") + 1);
            string fileName  = Guid.NewGuid().ToString() + "." + ImgExtend;

            Teacher editUser = new Teacher
            {
                TId     = txt_sId.Text.Trim(),
                TGender = ddl_gGender.Text.Trim(),
                TName   = txt_sName.Text.Trim(),
                TAge    = int.Parse(txt_sAge.Text.Trim()),
                TRemark = txt_Remark.InnerText.Trim()
            };

            if (ImgPath == "")
            {
                if (teacher != null)
                {
                    editUser.TPicture = teacher.TPicture;
                }
            }
            else
            {
                if (!(ImgExtend == "png" || ImgExtend == "jpg" || ImgExtend == "gif"))
                {
                    Label1.Text = "上传图片格式不正确!";
                    return;
                }
                string ServerPath = Server.MapPath("Img/") + fileName;
                FileUpload1.PostedFile.SaveAs(ServerPath);
                Label1.Text = "上传成功!图片名称为:" + ImgName;
                string uPic = "Img/" + fileName;
                image_Photo.ImageUrl = uPic;
                editUser.TPicture    = uPic;
            }

            if (Request["add"] != null)
            {
                bool result = false;
                try
                {
                    result = userInfoManager.AddTeaInfo(editUser);
                    if (result)
                    {
                        Response.Write("<script>alert('添加成功');</script>");
                        Server.Transfer("TeacherList.aspx");
                    }
                    else
                    {
                        Response.Write("<script>alert('添加失败,工号重复!');</script>");
                    }
                }
                catch (Exception)
                {
                }
            }
            else
            {
                if (userInfoManager.EditInfo(editUser))
                {
                    Response.Write("<script>alert('修改成功,请重新登录');</script>");
                    Response.Write("<script>top.location.href='Login.aspx?logout=-1'</script>");
                }
                else
                {
                    Response.Write("<script>alert('修改失败');</script>");
                }
            }
        }