Question

我有以下代码：

foreach (var questionGroups in Model.ClientQuestionGroups)
{
    for (var j = 0; j < questionGroups.Questions.Count; j++)
    {       
        <div class="test">
            @Html.HiddenFor(m => m.QuestionAnswers[j].FormAnswerId)
            @Html.HiddenFor(m => m.QuestionAnswers[j].QuestionId)
            @foreach (var alternative in questionGroups.Questions[j].QuestionAlternatives)
            {
                if (alternative.NestedQuestion != null)
                {
                   nestedQuestions.Add(alternative.NestedQuestion);
                }
            }
        </div>
    }
    if (nestedQuestions.Count > 0)
    {
        for (var i = 0; i < nestedQuestions.Count; i++)
        {
            <div class="nestedQuestion">
                @Html.HiddenFor(m => m.QuestionAnswers[i].FormAnswerId)
                @Html.HiddenFor(m => m.QuestionAnswers[i].QuestionId)
                @foreach (var alt in nestedQuestions[i].QuestionAlternatives)
                {
                   @Html.DisplayFor(m => alt.AlternativeText)
                   @Html.RadioButtonFor(m => m.QuestionAnswers[i].AlternativeId, alt.Id, new { @class = "questionAlternative" });
                }
            </div>
         }
    }
}

这会生成以下html：

<div class="test">
<input id="QuestionAnswers_0__FormAnswerId" type="hidden" value="00000000-0000-0000-0000-000000000000" name="QuestionAnswers[0].FormAnswerId" data-val-required="Fältet FormAnswerId krävs." data-val="true">
<input id="QuestionAnswers_0__QuestionId" type="hidden" value="427d0a77-b7b7-48b0-956a-28794145e0da" name="QuestionAnswers[0].QuestionId" data-val-required="Fältet QuestionId krävs." data-val="true">
Yes
<input id="QuestionAnswers_0__AlternativeId" class="questionAlternative" type="radio" value="aabf2548-abca-4cb5-89d8-759f2d71be01" nestedquestion="895015c0-2bf0-4c5a-95c9-8d4b29671bf7" name="QuestionAnswers[0].AlternativeId" data-val-required="Fältet AlternativeId krävs." data-val="true">
No
<input id="QuestionAnswers_0__AlternativeId" class="questionAlternative" type="radio" value="91b220dc-3ef3-45a9-8369-dc1e4e2530a8" nestedquestion="" name="QuestionAnswers[0].AlternativeId">
</div>

<div class="nestedQuestion questionDiv">
<p>Testar2</p>
<p>Testar2</p>
<input id="QuestionAnswers_0__FormAnswerId" type="hidden" value="00000000-0000-0000-0000-000000000000" name="QuestionAnswers[0].FormAnswerId">
<input id="QuestionAnswers_0__QuestionId" type="hidden" value="427d0a77-b7b7-48b0-956a-28794145e0da" name="QuestionAnswers[0].QuestionId">
Yes
<input id="QuestionAnswers_0__AlternativeId" class="questionAlternative" type="radio" value="aabf2548-abca-4cb5-89d8-759f2d71be01" name="QuestionAnswers[0].AlternativeId">
No
<input id="QuestionAnswers_0__AlternativeId" class="questionAlternative" type="radio" value="91b220dc-3ef3-45a9-8369-dc1e4e2530a8" name="QuestionAnswers[0].AlternativeId">
</div>

如您所见，ID-attribute和Name-attribute具有相同的值/名称。我不希望这样。我希望第一个div为0，嵌套的问题div为1，依此类推。我知道这是因为它处于相同的循环中。

我无法弄清楚如何解决这个命名架构。谁能把我推向正确的方向？

Answer 1

for（var i = 0; i＆lt; nestedQuestions.Count; i ++）

将第二个for循环更改为以下内容：

for（var i = 1; i＆lt; nestedQuestions.Count; i ++）

但这会很糟糕，因为当你有多个问题和多个嵌套问题时，他们会混淆不清。

也许这样的事情会更好：

if (nestedQuestions.Count > 0)
{
    for (var i = 0; i < nestedQuestions.Count; i++)
    {
        <div class="nestedQuestion">
            @Html.Hidden("NestedQuestions", Model.QuestionAnswers[i].FormAnswerId)
             @Html.Hidden("NestedQuestions", Model.QuestionAnswers[i].QuestionId)
            @foreach (var alt in nestedQuestions[i].QuestionAlternatives)
            {
               @Html.Display("NestedQuestion", alt.AlternativeText)
               @Html.RadioButton("NestedQuestion", m.QuestionAnswers[i].AlternativeId, alt.Id, new { @class = "questionAlternative" });
            }
        </div>
     }
}

这将生成你想要的东西，但在你的Post动作中你应该有一些属性来捕获这些嵌套对象。当你使名字匹配时，defaultModelBinder将绑定它。

问候，

斯文

Answer 2

你在哪里建造它？我想这是你的观点？在我看来，这不是最佳实践，因为你在那里放了太多的逻辑。是否无法在业务层/ mvc（控制器）中计算此值。所有if语句都太多了。在MVC中你应该尽可能避免视图中的逻辑。当我修复那个部分你可以在没有for循环的foreach中做foreach。使管理变得更加简单。

首先，for循环是否必要？

问候，

秒。

Answer 3

没有想到的例子..但是这可以帮助..

@{ int testCounter = 0; int nestedQuestionsCounter = 0; }

@foreach (var questionGroups in Model.ClientQuestionGroups)
{

        for (var j = 0; j < questionGroups.Questions.Count; j++)
        {       
        <div class="@(testCounter)test">
            @Html.HiddenFor(m => m.QuestionAnswers[j].FormAnswerId)
            @Html.HiddenFor(m => m.QuestionAnswers[j].QuestionId)
            @foreach (var alternative in questionGroups.Questions[j].QuestionAlternatives)
            {
                if (alternative.NestedQuestion != null)
                {
                   nestedQuestions.Add(alternative.NestedQuestion);
                }
            }
        </div>

    }

    if (nestedQuestions.Count > 0)
    {
        nestedQuestionsCounter = 1;
        for (var i = 0; i < nestedQuestions.Count; i++)
        {
            <div class="@(nestedQuestionsCounter)nestedQuestion">
                @Html.HiddenFor(m => m.QuestionAnswers[i].FormAnswerId)
                @Html.HiddenFor(m => m.QuestionAnswers[i].QuestionId)
                @foreach (var alt in nestedQuestions[i].QuestionAlternatives)
                {
                   @Html.DisplayFor(m => alt.AlternativeText)
                   @Html.RadioButtonFor(m => m.QuestionAnswers[i].AlternativeId, alt.Id, new { @class = "questionAlternative" });
                }
            </div>
            nestedQuestionsCounter++;
         }
    }
    testCounter++;
}

for循环中名称属性asp.net mvc的唯一名称

3 个答案: