Question

我在此代码中增加i，我无法解析。我在下面的代码中出了什么问题？

  @{        
            int i=0;
            }
@foreach (var item in Model.PortServiceTariffIncluded)
{


         <tr id="@("sp" + item.ServiceId)">
         <td>@item.ServiceName     <input type="hidden" name="QuotationDetailList[i].ServiceId" value="@item.ServiceId" /></td>
         <td>@item.ServiceCriteria</td>
         <td>@item.ItemBasis</td>
          <td>@Html.DropDownListFor(model => model.Currency, ViewBag.CurrencyDd as SelectList) <input type ="text" id="Amount@i" name="QuotationDetailList[i].Amount" /></td>
         <td><input type="hidden" value="@item.ServiceId" class="serviceslist" name="serviceslist" /><input type ="button" id="@item.ServiceId" name="btnremove" value="Remove" class="clsremove" /></td>
         </tr>
         i = i + 1;
}

Answer 1

请改用以下内容：

@foreach (var item in Model.PortServiceTariffIncluded.Select((value, i) => new { i, value })
{
     <tr id="@("sp" + item.value.ServiceId)">
         <td>@item.ServiceName <input type="hidden" name="QuotationDetailList[item.i].ServiceId" value="@item.value.ServiceId" /></td>
         <td>@item.value.ServiceCriteria</td>
         <td>@item.value.ItemBasis</td>
         <td>@Html.DropDownListFor(model => model.Currency, ViewBag.CurrencyDd as SelectList) <input type ="text" id="Amount@item.i" name="QuotationDetailList[item.i].Amount" /></td>
         <td><input type="hidden" value="@item.value.ServiceId" class="serviceslist" name="serviceslist" /><input type ="button" id="@item.value.ServiceId" name="btnremove" value="Remove" class="clsremove" /></td>
     </tr>
}

基本上，这会导致您的item变量成为一个由迭代器（item.i）和实际项（item.value组成）的对象。

Answer 2

首先，我会设置一个变量来包含您的QuotationDetailList：

@{ var QuotationDetailList = Model.QuotationDetailList;}

然后，在这里使用for而不是foreach：

@for (var ListIndex = 0; ListIndex < Model.PortServiceTariffIncluded.Count(); ListIndex++)

现在，您可以使用变量和索引来引用项目：

<td>@QuotationDetailList[ListIndex].ServiceName     <input type="hidden" name="@QuotationDetailList[ListIndex].ServiceId" value="@QuotationDetailList[ListIndex].ServiceId" /></td>

asp.net mvc razor无法通过计数器增量

2 个答案: