当我更改表单上的某些内容并单击保存时，ASP MVC5被删除，其他数据被删除

Question

当我从一个Partial视图中的dropDown上更改某些内容并单击Save按钮时，数据将从另一个Partial View页面中删除，我使用了多个数据切换选项卡，但实际的ActionLink保留了下来。我显然正在努力防止数据被擦除。

关于为什么会发生这种情况的任何想法/方向？

从“部分文档”标签中删除：

router.route('/')

// CREATE INITIAL PROFILE AND ADD EMAILS, ADDRESSES, PHONES AND BUSINESSES ONE-BY-ONE
.post(function( req, res ){

  Profile.findOne({'owner_id': req.body.ownerId}, (err, profile) => {

  })


  var card = new Card();

  card.owner_id = req.body.ownerId;
  card.card_name = req.body.card_name;
  card.card_subtitle = req.body.card_subtitle;
  card.card_type = req.body.card_type;
  card.card_color = req.body.card_color;

  card.first_name.item = req.body.first_name ;
  card.first_name._id = profile.first_name._id;

  card.last_name.item = req.body.last_name;
  card.last_name._id = profile.last_name._id;

  card.company = req.body.company;
  card.title = req.body.title;

  card.initial.item = req.body.initial ;
  card.initial._id = profile.initial._id;

  card.birthday.item = req.body.birthday ;
  card.birthday._id = profile.birthday._id;

  card.highschool.item = req.body.highschool;
  card.highschool._id = profile.highschool._id;

  card.college.item = req.body.college ;
  card.college._id = profile.college._id;

  card.facebook.item = req.body.facebook;
  card.facebook._id = profile.facebook._id;

  card.linkedin.item = req.body.linkedin ;
  card.linkedin._id = profile.linkedin._id;

  card.linkedin_bus.item = req.body.linkedin_bus ;
  card.linkedin_bus._id = profile.linkedin_bus._id;

  card.twitter.item = req.body.twitter ;
  card.twitter._id = profile.twitter._id;

  card.google.item = req.body.google ;
  card.google._id = profile.google._id;

  card.pinterest.item = req.body.pinterest;
  card.pinterest._id = profile.pinterest._id;

  card.user_image.item = req.body.user_image;
  card.user_image._id = profile.user_image._id;


  card.phones = req.body.phones;
  card.emails = req.body.emails;
  card.addresses = req.body.addresses;
  card.businesses = req.body.businesses;


  card.save(function(err){
    if(err)
      res.send(err);
    res.send({message:'Card has been added'});
  });



});

视图中的保存按钮：

     <td>
        @Html.DropDownListFor(x => x.DocumentType, new SelectList(ViewBag.DocumentTypes, "Value", "Text"), "Select Type", new { @class = "form-control", @placeholder = "Document Type" })
    </td>

从控制器保存并设置详细信息：

   <button type="submit" class="btn btn-primary saveDetails" disabled>Save Task Details</button>