获取视图控制器列表数据 [英] Get list data on view in controller

问题描述

我有我已经在一个循环中渲染的局部视图的视图。有一个列表，局部视图都被绑定在一个列表中的每个项目。输入值后，我没有控制器获取列表的价值。

I have a view in which I have rendered partial view in a loop. There is a list and partial view have is binded with each item in a list. I am not getting the value of the list on controller after value is entered.

下面是我的看法：

<table id="resourceRequirement" class="table" width="100%" border="0">
    <thead>
        <tr style="background-color:#dfdfdf;">
            <td><div align="center">PRIORITY</div></td>
            <td><div align="center">SYSTEM RESOURCE / COMPONENT</div></td>
            <td><div align="center">RECOVERY TIME OBJECTIVE</div></td>
        </tr>
    </thead>
    <tbody>
        @foreach (var item in Model.ResourceRequirement)
        {
            @Html.Partial("~/Views/Shared/_ResourceRequirement.cshtml", item)
        }
    </tbody>
</table>

下面是我的部分观点：

@model DisasterManagementSystem.Models.BusinessImpactAnalysis.ResourceRequirement
<tr>
    <td>
        @Html.TextBoxFor(m => m.priority)<br />
        <div style="color:red;">
            @Html.ValidationMessageFor(model => model.priority)
        </div>
    </td>
    <td>
        @Html.TextBoxFor(m => m.systemresource)<br />
        <div style="color:red;">
            @Html.ValidationMessageFor(model => model.systemresource)
        </div>
    </td>
    <td>
        @Html.TextBoxFor(m => m.receveryTime)<br />
        <div style="color:red;">
            @Html.ValidationMessageFor(model => model.receveryTime)
        </div>
    </td>
</tr>

下面是我的列表：

public List<ResourceRequirement> ResourceRequirement { get; set; }

和类是在这里：

public class ResourceRequirement
{
    [Required(ErrorMessage = "*")]
    public string priority { get; set; }

    [Required(ErrorMessage = "*")]
    public string systemresource { get; set; }

    [Required(ErrorMessage = "*")]
    public string receveryTime { get; set; }
}

请指教，当我试图从模型上后我收到列表为空的列表中。

Please advise when i am trying to get the list from model on post I am getting the list as null.

推荐答案

您使用的foreach 循环，部分正在产生重复的名称属性没有索引（所以不能绑定到一个集合）和复制 ID 属性（无效的HTML）。

You use of a foreach loop and a partial is generating duplicate name attributes without indexers (so cannot bind to a collection) and duplicate id attributes (invalid html).

而不是一个局部视图，使用 EditorTemplate 。重命名当前的局部视图 ResourceRequirement.cshtml （即以匹配类的名称），并将其放置在 /查看/共享/ EditorTemplates 文件夹（或 /查看/ yourController / EditorTemplates 文件夹）

Instead of a partial view, use an EditorTemplate. Rename your current partial view to ResourceRequirement.cshtml (i.e. to match the name of the class) and place it in the /Views/Shared/EditorTemplates folder (or in the /Views/yourController/EditorTemplates folder)

然后在主视图中，删除的foreach 循环，以

Then in the main view, remove the foreach loop and replace it with

<tbody>
    @Html.EditorFor(m => m.ResourceRequirement)
</tbody>

的 EditorFor（）方法接受的IEnumerable＆LT; T＆GT; 并生成正确的HTML为您收藏的每件。如果你检查HTML你将看到正确的名称与窗体控件的属性。

The EditorFor() method accepts IEnumerable<T> and generates the correct html for each item in your collection. If you inspect the html you will now see the correct name attributes in your form controls

<input type="text" name="ResourceRequirement[0].priority" .... />
<input type="text" name="ResourceRequirement[1].priority" .... />
<input type="text" name="ResourceRequirement[2].priority" .... />

等。其中，当你提交表单将绑定到你的模型（以比较这你的当前生成）

etc. which will bind to your model when you submit the form (compare this with what your currently generating)

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