在的HtmlHelper使用动作＆LT ASP.NET MVC3; T＆GT;作为模板：剃刀语法？ [英] HtmlHelper in ASP.NET MVC3 that uses Action<T> as template: Razor syntax?

问题描述

让我preface此说，也许有更好的方式来做到这一点，剃刀照明方式。在任何情况下，我有一个HTML帮手，充当各种各样的中继器，但重复任意数量之后，它插入一个备用模板。最明显的用途？使得x单元格后开始一个新行的表。助手看起来是这样的：

Let me preface this by saying that perhaps there's a better way to do this, and Razor is lighting the way. In any case, I have an HTML helper that acts as a repeater of sorts, but after an arbitrary number of repeats, it inserts an alternate template. Most obvious use? Tables that start a new row after x cells. The helper looks like this:

public static void SeriesSplitter<T>(this System.Web.Mvc.HtmlHelper htmlHelper, IEnumerable<T> items, int itemsBeforeSplit, Action<T> template, Action seriesSplitter)
{
    if (items == null)
        return;
    var i = 0;
    foreach (var item in items)
    {
        if (i != 0 && i % itemsBeforeSplit == 0)
            seriesSplitter();
        template(item);
        i++;
    }
}

和在Web表单视图，用法如下：

And in a Webforms view, the usage looks like this:

<table>
    <tr>
    <% Html.SeriesSplitter(Model.Photos, 4, photo => { %>
            <td><img src="<%=ResolveUrl("~/Thumbnail.ashx?id=" + photo.ID)%>" alt="<%=Html.Encode(photo.Title)%>" /></td>
    <% }, () => { %></tr><tr><% }); %>
    </tr>
</table>

在这种情况下，你必须呈现四个单元的表，然后使用备用模板（行开始和结束标记）开始一个新行。问题是，我不能找到一种方法，使在剃刀这项工作。用剃刀视图内的lambda看起来像一个pretty怪异的结构。

In this case, you'd have a table that renders four cells, then starts a new row by using the alternate template (the row start and end tags). The problem is that I can't find a way to make this work in Razor. Using a lambda inside of a Razor view seems like a pretty weird construct.

你会怎么做？

推荐答案

其实菲尔有一个很好的职位，在这里解决了这个问题：

Phil actually had a good post that solves the problem here:

http://haacked.com/archive/2011/ 2月27日/模板 - 剃刀delegates.aspx

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