ASP.NET MVC 2:foreach、RenderPartial、ViewModel

发布于 2024-10-10 04:15:18 字数 640 浏览 0 评论 0原文

我正在尝试采用一种我发现的看起来很干净的技术。

以前,我的 Partial 内部有循环。我正在循环遍历 Partial 中的模式...但后来我遇到了一个示例,其中 foreach 循环存在于主页中,而 Partial 只是循环的核心。

他们是这样完成的:

<% int index = 1; // iteration
foreach (var item in Model.Deal) { %>

     <% Html.RenderPartial("DealList", item, new ViewDataDictionary {{ "index", index }}); %>

<% i++; // increase the interation
} %>

但在我的示例中,我使用的是 ViewModel,现在我处于部分状态,我无法像以前那样访问“项目”。相反,我唯一的选择是 Model.Deal ...

如果我无法通过说 来访问它,那么使用 RenderParial 帮助器传递“item”有什么意义呢? item.StoreName?请注意,View 和 Partial 都强类型化为同一个 ViewDataModel。

I'm trying to employ a technique that I came across that seems quite clean.

Previously, my Partial had the loop inside of it. I was looping through the mode within the Partial... but then I came across an example where the foreach loop existed in the main page, while the partial was just the meat of the loop.

They accomplished it like so:

<% int index = 1; // iteration
foreach (var item in Model.Deal) { %>

     <% Html.RenderPartial("DealList", item, new ViewDataDictionary {{ "index", index }}); %>

<% i++; // increase the interation
} %>

But in my example, I'm using a ViewModel, and now that I'm in the partial, I can't access "item" like I used to be able to. Instead my only option is Model.Deal ...

What is the point of passsing "item" with the RenderParial helper if I can't access it by saying item.StoreName? Note, both the View and the Partial are strongly typed to the same ViewDataModel.

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温柔戏命师 2024-10-17 04:15:18

在部分“DealList”内部,您的模型将是主视图中的任何 item 。在分部视图内部,Model.Deal 引用 item 内部的 Deal 对象(来自主视图)。

这意味着您的 StoreName 属性将可以在部分视图中作为 Model.StoreName 进行访问。

作为旁注,我组合了一个扩展方法来处理多个部分视图的渲染,以便不需要循环。

新方法称为 RenderPartials :

public static void RenderPartials(this HtmlHelper helper, string partialViewName, IEnumerable models, string htmlFormat)
        {
            foreach (var view in models.Select(model => helper.Partial(partialViewName,model)))
            {
                helper.ViewContext.HttpContext.Response.Output.Write(htmlFormat, view.ToHtmlString());
            }
        }

使用此方法,您可以简单地说:

<% Html.RenderPartials("DealList",Model.Deal); %>

在主视图内,没有循环。

还有更多 关于此的信息在这里,其中解释了有关 htmlFormat 参数等的更多信息。

希望这对您有帮助。

Inside of the partial "DealList" your model will be whatever item is in the main view. Inside of the partial view, Model.Deal refers to a Deal object inside of item (from the main view).

This means that your StoreName property will be accessible as Model.StoreName within your partial view.

As a side note, I put together an extension method to deal with rendering of multiple partial views so as to not require the looping.

The new method is called RenderPartials:

public static void RenderPartials(this HtmlHelper helper, string partialViewName, IEnumerable models, string htmlFormat)
        {
            foreach (var view in models.Select(model => helper.Partial(partialViewName,model)))
            {
                helper.ViewContext.HttpContext.Response.Output.Write(htmlFormat, view.ToHtmlString());
            }
        }

Using this method you can simple say:

<% Html.RenderPartials("DealList",Model.Deal); %>

inside your main view, without the loop.

There's some more information about this here which explains more about the htmlFormat parameter etc.

Hope this is helpful to you.

一梦等七年七年为一梦 2024-10-17 04:15:18
@model IEnumerable<dynamic>

@foreach (dynamic m in Model)
{
     @Html.Partial(MVC.Lists.Messages.Views._SingleMessage, (object)m)
}
@model IEnumerable<dynamic>

@foreach (dynamic m in Model)
{
     @Html.Partial(MVC.Lists.Messages.Views._SingleMessage, (object)m)
}
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