嵌套BeginCollectionItem

本文介绍了嵌套BeginCollectionItem的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我使用的是史蒂夫·桑德森的BeginCollectionItem的方法来添加动态内容。当我这样做的第一个层面，一切工作正常。但是，当试图实现一个嵌套集合在另一个BeginCollectionItem意思是BeginCollectionItem，它似乎并没有工作。

I'm using Steve Sanderson's BeginCollectionItem approach to add dynamic content. Everything works fine when I'm doing it on the first level. However, when try to implement a nested collection meaning a BeginCollectionItem in another BeginCollectionItem, it doesn't seem to work.

我的模型如下：

public class Order
{

        [Key]
        [HiddenInput]
        public int id { get; set; }

        [Display(Name = "Order number")]
        public string number { get; set; }

        ...

        [Display(Name = "Payment method")]
        public List<PaymentMethod> payment_methods { get; set; }

        ...
}

public class PaymentMethod
{
        public MethodOfPayment method { get; set; }
        public CC cc { get; set; }
        public CASH cash { get; set; }
        public TT tt { get; set; }
}

public class TT
{
        [Key]
        public int id { get; set; }

        [Required(ErrorMessage = "{0} is required.")]
        [Display(Name = "Total amount")]
        public double? total_value { get; set; }

        ...

        [Display(Name = "Transfers")]
        public List<Transfer> transfers { get; set; }
}

public class Transfer
{
        [Key]
        public int id { get; set; }

        [Display(Name = "Payment")]
        public int payment_id { get; set; }

        [Required(ErrorMessage = "{0} is required.")]
        [Display(Name = "SWIFT")]
        public string swift { get; set; }

        [Required(ErrorMessage = "{0} is required.")]
        [Display(Name = "Amount transferred")]
        public double? transfer_amount { get; set; }

        [Required(ErrorMessage = "{0} is required.")]
        [Display(Name = "Date transferred")]
        public DateTime transfer_date { get; set; }

        ...
}

现在我有什么就是命令可能有几种付款方式，而如果支付方法之一是TT（电传传输）它可能有涉及到几个传输。
实施一阶几种付款方式作为收藏的作品，但是当我尝试实施TT内的几个传输，没有这些转移支付被传递给控制器。

Now what i have is an Order which could have several payment methods, and if one of the payment methods is a TT (telex transfer) it could have several transfers involved.Implementing several payment methods in one Order as a collection works, but when I try to implement several transfers within a TT, nothing of these transfers gets passed to the controller.

下面就是我的看法是这样的：

Here's what my view looks like:

@model prj.Models.Model.Order

@using (Html.BeginForm("Create")){
@Html.ValidationSummary(true, "Creation was unsuccessful. Please correct the errors and try again.")

...

@Html.TextBoxFor(m => m.number, new { id = "txtnumber" })

...


<div id="editorPaymentRows">
    @foreach (var payment in Model.payment_methods)
    {
        @Html.Partial("_NewPayment", payment)
    }
</div>

}

在_NewPayment部分：

In the _NewPayment partial:

@using prj.Helpers
@model prj.Models.Model.PaymentMethod

<div class="editPaymentRow">

@using (Html.BeginCollectionItem("payment_methods"))
{
...

<div class="editor-label">
    @Html.LabelFor(m => m.tt.total_value)<req>*</req>
</div>

<div class="editor-field">
    @Html.TextBoxFor(m => m.tt.total_value)
</div>

...


<div id="editorTransferRows">
   @if (Model.tt != null)
{
    foreach (var transfer in Model.tt.transfers)
    {
         @Html.Partial("_NewTransfer", transfer)
    }
}
...
</div>



}

</div>

终于在_NewTransfer部分：

and finally in the _NewTransfer partial:

@using prj.Helpers
@model prj.Models.Model.Transfer
...

<div class="editTransferRow">
//using (Html.BeginCollectionItem("transfers"))
@using (Html.BeginCollectionItem("tt.transfers"))
{
...

<div class="editor-label">
    @Html.LabelFor(m => m.swift)<req>*</req>
</div>

<div class="editor-field">
    @Html.TextBoxFor(m => m.swift, new { @class = "t_swift" })
</div>

...

<div class="editor-label">
    @Html.LabelFor(m => m.transfer_amount)<req>*</req>
</div>

<div class="editor-field">
    @Html.TextBoxFor(m => m.transfer_amount, new { @class = "t_transfer_amount" })
</div>

...
}

</div>

所以一切正常，除了在控制列表转让这是在PaymentMethods的TT属性始终为空。它不被传递到控制器正常。是不是有什么我失踪？

So everything works, except in the controller the List transfers which is in TT property of the PaymentMethods is always null. It's not being passed to the controller properly. Is there something i'm missing?

难道嵌套BeginCollectionItem不行？有一个额外的步骤，我必须做什么？
请一些线索。
谢谢

Does nested BeginCollectionItem not work? is there an extra step I must do?Please shed some light.Thanks

我想通了使用在以下链接所示乔史蒂文斯的方法：

I figured it out using Joe Stevens' method shown at the following link:

http://www.joe-stevens.com/2011/06/06/editing-and-binding-nested-lists-with-asp-net-mvc-2/

干杯

BeginCollectionItem

问题描述

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