<div class="form-group">
        <label class="col-sm-2 control-label">教師</label>
             <div class="col-sm-10">
              <select style="display:block;
                  width:100%;
                  height:34px;
                  padding:6px 12px;
                  font-size:14px;
                  line-height:1.4;
                  border-radius:4px;
                  border:1px solid #ccc;
                  color:#555; "
                  ng-model="editCourse.TeacherName"
                  ng-options="Teacher.UserName for Teacher in TeacherList" required>
                <option value="">選擇教師</option>
               </select>
             </div>
      </div>

    //data為課程的編號ID
   $scope.Edit = function (data) {
      //通過課程ID獲取課程對象
      CourseService.getByCourseID(data).then(function (result) {
        $scope.editCourse = result.data;
        //默認值設定
        //先通過課程里面的教師ID獲取教師對象
        CourseService.GetTeacherByTeacherID(result.data.TeacherID).then(function (result) {
         //$scope.TeacherList為所有教師的列表
          for (i = 0; i < $scope.TeacherList.length; i++) {
            //如果當前課程教師的ID與當前遍歷到的教師的ID相等的話就把當前遍歷到的這個教師的對象給到 ng-model="editCourse.TeacherName"
            if (result.data.UserID == $scope.TeacherList[i].UserID) {
              $scope.editCourse.TeacherName = $scope.TeacherList[i];
            }
          }
        });
        angular.element("#edit").modal({
          show: true
        })
      })
    }