asp.net-mvc - (MVC 3 Razor) - 循环通过 3 列 div 的更简单方法

Question

目前我在我的 CSHTML 中使用以下代码：

@{int i = 0;}
@foreach (var item in Model.Traders)
{
    if ((i++ % 3) == 0) {
        if (i != 1) {
            @:</div>
        }
        @:<div class="row">
    }

    @:<div class="four column"><div class="panel new"><h3 class="dotted"><strong>@item.Title</strong></h3><p>@item.Description</p><code>&lt;div class=&quot;panel pick&quot;&gt;</code></div></div>
}

@if (i != 0) {
    @:</div>
}

这将输出以下 HTML：

<div class="row">
    <div class="four column"><div class="panel new"><h3 class="dotted"><strong>Title</strong></h3><p>Description</p><code>code</code></div></div>
    <div class="four column"><div class="panel new"><h3 class="dotted"><strong>Title</strong></h3><p>Description</p><code>code</code></div></div>
    <div class="four column"><div class="panel new"><h3 class="dotted"><strong>Title</strong></h3><p>Description</p><code>code</code></div></div>
</div>
<div class="row">
    <div class="four column"><div class="panel new"><h3 class="dotted"><strong>Bobby</strong></h3><p>Bobby bobby bobby</p><code>&lt;div class=&quot;panel pick&quot;&gt;</code></div></div>
    <!-- Add missing divs if there's less than 3 (there always needs to be 3 divs inside a div row). In this case it's 2 that are missing -->
    <div class="four column"></div> <!-- my code does not render these -->
    <div class="four column"></div> <!-- my code does not render these -->
</div>

我的问题是是否有一种更简单的方法可以在我的视图中实现我正在做的事情，并确保在连续少于 3 个的情况下添加缺少的 div。

Answer 1

批量交易 3 件商品，试试这个：

@{

    var g = Model.Traders.GroupBy(r => Model.Traders.IndexOf(r) / 3).ToList();
}

@foreach (var parentItem in g)
{ 
    <div class="row">
        @foreach (var item in parentItem)
        { 
           <div class="four column"><div class="panel new"><h3 class="dotted"><strong>@item.Title</strong></h3><p>@item.Description</p><code>&lt;div class=&quot;panel pick&quot;&gt;</code></div></div>


        }


    @for (int i = parentItem.Count(); i < 3; i++)
    { 
        <div class="four column"></div>
    }
    </div>
}

问候。