ASP.NET MVC 3 Razor 递归函数 [英] ASP.NET MVC 3 Razor recursive function
问题描述
好的,所以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...
我不知道有多少层要显示,所以我想这是我打破旧递归例程的地方.
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.
不过我不知道该怎么做.
I'm having trouble with exactly how to go about this though.
这是我目前所拥有的(在视图中 - 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?
}
现在这些对象中的每一个都有一个 List
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.
我想这里可以使用 Razor 函数,但我需要一些帮助来形成它.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);
}
}
}
}
但正如你所看到的,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助手.
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>
}
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