与MVC发布列表奇怪的行为 [英] Strange behaviour with MVC posting list

问题描述

我有我的看法如下动态创建文本框：

  @for（INT I = 0; I＆LT; Model.MullionList.Count;我++）
{
    ItemDrops curMullItem = Model.MullionList.ElementAt（ⅰ）;
    ＆LT; D​​IV CLASS =表单组＆GT;
        @ Html.Label（curMullItem.ItemName.ToString（），新的{@class =COL-SM-6控制标签}）        ＆LT; D​​IV CLASS =COL-SM-6＆GT;
            @ Html.TextBoxFor（X =＆GT; x.MullionList [I] .ItemPossInfo，新{@class =表格控}）
            @ Html.HiddenFor（X =＆GT; x.MullionList [I] .ItemName）
        ＆LT; / DIV＆GT;
    ＆LT; / DIV＆GT;
}
 

我occaionally注意到了某些类型的产品发布时（对于MullionList）这是返回null的，即使我选择了这些下拉菜单。

所以它适用于特定的产品，而不是其他。

更加古怪的部分是，当我进一步去除这部分下来它的工作原理图（当窗体发布即MulionList不为null）

 ＆LT; D​​IV CLASS =表单组＆GT;
    @ Html.Label（玻璃，新{@class =COL-SM-6控制标签ID =玻璃第一标签}）
    ＆LT; D​​IV CLASS =COL-SM-6＆GT;
        @ Html.DropDownListFor（区=＆GT; gu.GlassItems [0] .value的，Model.GlassTypes - 选择 - 新{@class =表格控玻璃多选ID =玻璃+ 0}）
    ＆LT; / DIV＆GT;
＆LT; / DIV＆GT;＆LT; D​​IV ID =隐玻璃选择的风格=显示：无＆GT;
    @for（INT I = 1; I＆LT; Model.GlassUnitsCount;我++）
    {
        变种glassUnit = Model.GlassUnits.ElementAt（ⅰ）;
        ＆LT; D​​IV CLASS =表单组＆GT;
            @ Html.Label（glassUnit.ToString（），新的{@class =COL-SM-6控制标签}）
            ＆LT; D​​IV CLASS =COL-SM-6＆GT;
                @ Html.DropDownListFor（区=＆GT; gu.GlassItems [I] .value的，Model.GlassTypes - 选择 - 新{@class =表格控玻璃多选ID =玻璃+ I}）
            ＆LT; / DIV＆GT;
        ＆LT; / DIV＆GT;    }
＆LT; / DIV＆GT;＆LT; D​​IV CLASS =表单组＆GT;
    @ Html.LabelFor（去=＆GT; go.GlazzingInfoVal，Glazzing选项，新{@class =COL-SM-6控制标签}）
    ＆LT; D​​IV CLASS =COL-SM-6＆GT;
        @ Html.DropDownListFor（去=＆GT; go.GlazzingInfoVal，Model.GlazzingOptions - 选择 - 新{@class =表格控}）
    ＆LT; / DIV＆GT;
＆LT; / DIV＆GT;
 

解决方案

我想我现在已经解决了这个问题。

我改名的所有项目（与玻璃或Glazzing启动列表和它的作品！）

这看起来像一个合适的MVC错误

由于这样的回答： http://stackoverflow.com/a/16113919/66975

这已经成本核算好几个小时，GRRRR

I have the following dynamically created textboxes in my view:

 @for (int i = 0; i < Model.MullionList.Count; i++)
{
    ItemDrops curMullItem = Model.MullionList.ElementAt(i);
    <div class="form-group">
        @Html.Label(curMullItem.ItemName.ToString(), new { @class = "col-sm-6 control-label" })

        <div class="col-sm-6">
            @Html.TextBoxFor(x => x.MullionList[i].ItemPossInfo, new { @class = "form-control" })
            @Html.HiddenFor(x => x.MullionList[i].ItemName)
        </div>
    </div>                                
}

I noticed occaionally for certain types of product this was returning null when posted (for MullionList), even though i selected these dropdowns.

so it works for certain product but not others.

The even weirder part is when i remove this section further down the view it works (ie MulionList is not null when the form is posted)

 <div class="form-group">
    @Html.Label("Glass", new { @class = "col-sm-6 control-label", id = "glass-first-label" })
    <div class="col-sm-6">
        @Html.DropDownListFor(gu => gu.GlassItems[0].Value, Model.GlassTypes, "-- Select --", new { @class = "form-control glass-multi-select", id = "Glass" + 0 })
    </div>
</div>

<div id="hidden-glass-select" style="display: none">
    @for (int i = 1; i < Model.GlassUnitsCount; i++)
    {
        var glassUnit = Model.GlassUnits.ElementAt(i);
        <div class="form-group">
            @Html.Label(glassUnit.ToString(), new { @class = "col-sm-6 control-label" })
            <div class="col-sm-6">
                @Html.DropDownListFor(gu => gu.GlassItems[i].Value, Model.GlassTypes, "-- Select --", new { @class = "form-control glass-multi-select", id = "Glass" + i })
            </div>
        </div>

    }
</div>

<div class="form-group">
    @Html.LabelFor(go => go.GlazzingInfoVal, "Glazzing Option", new { @class = "col-sm-6 control-label" })
    <div class="col-sm-6">
        @Html.DropDownListFor(go => go.GlazzingInfoVal, Model.GlazzingOptions, "-- Select --", new { @class = "form-control" })
    </div>
</div> 

解决方案

I think I have fixed this now.

I renamed all items (lists that started with Glass or Glazzing and it works!)

This looks like a proper MVC bug

Thanks to this answer:http://stackoverflow.com/a/16113919/66975

This has costed me several hours, GRRRR

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