ASP.NET MVC 3 Razor递归功能 [英] ASP.NET MVC 3 Razor recursive function

问题描述

好的，我想显示一个包含列表列表的列表...

Okay, so I want to display a list containing lists of lists of lists...

我无法知道要显示多少个级别，因此我认为这是我打破旧的递归例程的地方.

I have no way of knowing how many levels there are to display, so I figured this is where I break out the old recursive routine.

我在确切地解决该问题上遇到了麻烦.

I'm having trouble with exactly how to go about this though.

这是我到目前为止(鉴于-简化):

This is what I have so far (in view - simplified):

@foreach(MyObject item in @Model.ListOfObjects){ 
    <div> @item.Title </div>
    //Call recursive function?
}

现在每个这些对象还具有一个List< MyObject>.我想显示此div以下的每个级别，例如，每个级别都有一个缩进标签.

Now each of these objects also have a List<MyObject>. I want to display each level below this div, with a tab indent per level for instance.

我本来想在这里使用Razor函数，但在构建该函数时需要一些帮助.这是我的想法:

I was thinking a Razor function would be the thing to do here, but I need some help in forming it. Here's my thinking:

@functions{
    public static void ShowSubItems(MyObject _object){
         if(_object.ListOfObjects.Count>0){
             foreach(MyObject subItem in _object.listOfObjects){

                 // Show subItem in HTML
                 ShowSubItems(subItem);
             }
         }
     }
 }

但是正如您所看到的，我显然需要一些帮助:)

But as you can see, I plainly need some help :)

推荐答案

Razor视图引擎允许使用@helper关键字编写内联递归帮助器.

The Razor view engine allows to write inline recursive helpers with the @helper keyword.

@helper ShowTree(IEnumerable<Foo> foos)
{
    <ul>
        @foreach (var foo in foos)
        {
            <li>
                @foo.Title
                @if (foo.Children.Any())
                {
                    @ShowTree(foo.Children)
                }
            </li>
        }
    </ul>
}

这篇关于ASP.NET MVC 3 Razor递归功能的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！