<select name="courseID" id="courseID">

                                  @foreach (var item in (List<teacher_course_mapping>)ViewBag.myCourse)

                                  {

                                      <option value="@item.courseID" term="@item.term"  或 value2='' value3=''    >  @item.major >  @item.grade  > (@item.term)@item.CourseName   </option>

                                  }

       </select>

 $.ajax({

                url: '/UploadPaper/Upload",

                type: 'POST',

                processData: false,

                contentType: false,

                data: { 
                      term: $('#courseID').find('option:selected').attr("term"),  //通过JQuery获取属性值
                      value2:$('#courseID').find('option:selected').attr("value2"),
                    },

                success: function (res) {

                }

            });