Question

我只是试图从表单帖子中绑定一个集合。我在模型中的集合与我试图绑定的名称不同，我的问题就是这个问题。我有这个工作，然后它停止了。我找不到改变的东西让它停下来。

我认为我的问题类似于这个问题： ASP.NET MVC5: Want to update several items in Collection with model binding

我已经读了几遍（斯科特汉塞尔曼可以指望这些事情的清晰画面）： http://www.hanselman.com/blog/ASPNETWireFormatForModelBindingToArraysListsCollectionsDictionaries.aspx

这里有一些代码：

public class AttestModel
{
    public Account Account { get; set; }
    public List<AccountSimpleDetail> AccountSimpleDetails { set; get; }
}

public class AccountSimpleDetResponseModel
{
    public int AccountSimpleDetailId { get; set; }
    public int AnswerId { get; set; }
}

public partial class AccountSimpleDetail :   
{

  public int AccountSimpleDetailId { get; set; }
  public int? SaqSimpleQuestionId { get; set; }
  public int? SaqAnswerId { get; set; }


  ...More fields go on here
 }

在我有的视图中：

 @for (var i = 0; i < Model.AccountSimpleDetails.Count(); i++)
 {
     @Html.HiddenFor(x => x.AccountSimpleDetails[i].AccountSimpleDetailId)
     @Html.HiddenFor(x => x.AccountSimpleDetails[i].AnswerId)
 }

我有一些Javascript来处理点击浏览器中的一组按钮，这些按钮在隐藏字段中设置AnswerId。这很好。

生成的标记如下所示：

<input data-val="true" data-val-number="The field AccountSimpleDetailId must be a number." data-val-required="The AccountSimpleDetailId field is required." id="AccountSimpleDetails_1__AccountSimpleDetailId" name="AccountSimpleDetails[1].AccountSimpleDetailId" type="hidden" value="71" />
<input data-val="true" data-val-number="The field AnswerId must be a number." id="AccountSimpleDetails_1__AnswerId" name="AccountSimpleDetails[1].AnswerId" type="hidden" value="1" />

方法签名如下所示：

public ActionResult Attest(int id, List<AccountSimpleDetResponseModel> AccountSimpleDetails)

我之前使用过的（停止工作）是：

public ActionResult Attest(int id, [Bind(Prefix = "AccountSimpleDetails")] List<AccountSimpleDetResponseModel> simpleDetails)

绑定的结果始终为null。

我知道当我到达尝试某些东西的地步时，它不起作用，我尝试别的东西......它只是意味着我错过了一些基本点。谢谢你的时间。

修改

这是帖子请求（来自监视列表的Raw）：

AccountSimpleDetails%5b1%5d.AccountSimpleDetailId=165&AccountSimpleDetails%5b1%5d.AnswerId=1&AccountSimpleDetails%5b2%5d.AccountSimpleDetailId=166&AccountSimpleDetails%5b2%5d.AnswerId=1&AccountSimpleDetails%5b3%5d.AccountSimpleDetailId=167&AccountSimpleDetails%5b3%5d.AnswerId=1&AccountSimpleDetails%5b4%5d.AccountSimpleDetailId=168&AccountSimpleDetails%5b4%5d.AnswerId=1&DXScript=1_171%2c1_94%2c1_93%2c17_33%2c17_2%2c1_152%2c1_164%2c1_91%2c1_156%2c1_101%2c17_7%2c1_154%2c1_103%2c1_102%2c17_8%2c1_114%2c1_121%2c1_169%2c1_138%2c1_170%2c1_124%2c17_9%2c1_163%2c1_162%2c1_147%2c17_32%2c1_157%2c1_98%2c1_125%2c1_104%2c1_166%2c1_139%2c17_13%2c1_97%2c1_141%2c1_142%2c17_15%2c1_155%2c1_143%2c1_144%2c17_16%2c17_17%2c1_126%2c17_11%2c1_146%2c1_149%2c17_20%2c1_160%2c17_22%2c1_158%2c1_153%2c1_161%2c17_25%2c1_165%2c17_28%2c17_31%2c1_100%2c5_5%2c5_4%2c4_11%2c4_10%2c4_6%2c4_7%2c4_9%2c17_14%2c4_12%2c1_113%2c1_116%2c4_13%2c4_14%2c1_110%2c1_112%2c1_137%2c17_12%2c1_159%2c7_49%2c7_47%2c7_51%2c17_21%2c1_105%2c1_108%2c1_117%2c17_0%2c1_120%2c1_106%2c17_1%2c1_107%2c17_3%2c1_109%2c1_122%2c17_5%2c1_145%2c1_119%2c17_18%2c17_19%2c1_118%2c17_29%2c1_123%2c10_2%2c10_1%2c10_3%2c10_4%2c17_4%2c9_23%2c9_22%2c9_24%2c17_24%2c9_13%2c9_10%2c9_8%2c17_23%2c9_12%2c9_9%2c9_15%2c9_11%2c1_96%2c8_10%2c8_17%2c8_24%2c8_26%2c8_9%2c8_12%2c8_13%2c8_18%2c17_26%2c8_21%2c8_23%2c8_22%2c8_16%2c8_19%2c8_20%2c8_14%2c8_15%2c8_25%2c8_11%2c6_12%2c17_30%2c16_16%2c16_18%2c16_14%2c16_11%2c16_19%2c16_6%2c16_15%2c16_8%2c16_12%2c16_13%2c16_7%2c17_27%2c16_17&DXCss=http%3a%2f%2ffonts.googleapis.com%2fcss%3ffamily%3dOpen%2bSans%3a300%2c400%2c600%2c700%2c800%257CShadows%2bInto%2bLight%2c%2fContent%2fbootstrap.min.css%2c%2fContent%2fMainSite.css%2c%2fContent%2fSiteAdjustments.css%2c%2fContent%2ffont-awesome.min.css%2c1_12%2c1_14%2c0_863%2c0_859%2c1_10%2c0_695%2c1_5%2c0_697%2c0_703%2c0_706%2c0_823%2c0_813%2c0_861%2c0_709%2c4_2%2c0_711%2c5_1%2c0_794%2c0_776%2c0_778%2c7_1%2c7_0%2c1_1%2c0_671%2c9_18%2c9_19%2c9_21%2c9_20%2c0_888%2c9_17%2c0_890%2c0_790%2c8_2%2c0_792%2c8_0%2c0_810%2c6_2%2c0_812%2c0_796%2c16_2%2c0_798

Answer 1

您将控件绑定到AttestModel的属性，以便回发模型

public ActionResult Attest(AttestModel model)

并且AccountSimpleDetails属性将正确绑定到集合。但是，查看您编辑的帖子请求后，索引器似乎从1开始，而不是0（即第一个是AccountSimpleDetails[1].AccountSimpleDetailId=165...。您是否有任何javascript删除项目如果是这样，它将不会绑定集合，因为索引器基于零（并且必须是连续的），因此您需要为索引属性添加一个额外的控件。

Answer 2

我有这个：

 @for (int x = 0; x < Model.AccountSimpleDetails.Count(); x++)
 {
      <span>@x</span>
 }

它返回： 1,2,3

斯蒂芬指出，这就是解析问题的原因。这才是真正的问题。

由于

MVC5将表单帖子绑定到集合 - 即将出现

修改

2 个答案: