ASP.NET MVC - 无法绑定数组视图模型 [英] ASP.NET MVC - Can't bind array to view model

问题描述

我有一个从该视图模型包括一组复选框。我需要的复选框来映射到一个数组中后我控制器的背法结合的时候。

下面是视图模型。

  @model TMDM.Models.TestSeriesCreateViewModel@ {
    ViewBag.Title =创建;
}＆LT; H2＆GT;创建一个测试系列＆LT; / H＆GT;
@using（Html.BeginForm（））{
    @ Html.ValidationSummary（真）
    ＆LT;＆字段集GT;        ＆LT; D​​IV CLASS =编辑标记＆GT;
            @ Html.LabelFor（型号=＆GT; model.Title）
        ＆LT; / DIV＆GT;
        ＆LT; D​​IV CLASS =主编场＆GT;
            @ Html.EditorFor（型号=＆GT; model.Title）
            @ Html.ValidationMessageFor（型号=＆GT; model.Title）
        ＆LT; / DIV＆GT;        ＆LT; H3＆GT;哪些测试集合在这个测试系列＆LT; / H3 GT＆;
        ＆LT; D​​IV CLASS =主编场＆GT;
        @ {
            变种I = 0;
            的foreach（在Model.TestCollections VAR为TestCollection）
            {
                ＆LT;输入类型=复选框ID =ChosenTestCollectionIds [@i]NAME =ChosenTestCollectionIds [@i]VALUE =@ testCollection.Id/＆GT;
                ＆LT;跨度＆GT; @ testCollection.Title＆LT; / SPAN＆GT;
                ＆LT; BR /＆GT;
                我++;
            }
         }
        ＆LT; / DIV＆GT;        ＆所述p为H.;
            ＆LT;输入类型=提交值=保存级=中的绿色真棒/＆GT;
            @ Html.ActionLink（取消，索引，TestSeries，空，新的{@class =中等黑真棒}）
        ＆所述; / P＆GT;
    ＆LT; /字段集＆GT;
 

的形式呈现细，我检查源和每个输出复选框有自己的ID和姓名字段不同的号码。

 ＆LT;输入类型=复选框ID =ChosenTestCollectionIds [0]NAME =ChosenTestCollectionIds [0]值=5/＆GT;
＆LT;输入类型=复选框ID =ChosenTestCollectionIds [1]NAME =ChosenTestCollectionIds [1]VALUE =6/＆GT;
//等等...
 

下面是视图模型。

 公共类TestSeriesModel
{
    公众诠释标识{搞定;组; }
    公共字符串名称{搞定;组; }
}公共类TestSeriesCreateViewModel：TestSeriesModel
{
    公开名单＆LT; ITestCollectionDataObject＆GT; TestCollections {搞定;组; }
    公众诠释[] {ChosenTestCollectionIds获得;组; }
}
 

我遇到的问题是，当窗体回发的ChosenTestCollectionIds阵列回来空。我在做什么错在这里？

答案

我已经计算出如何做到这一点：

 ＆LT;输入类型=复选框ID =[@我]NAME =ChosenTestCollectionIdsVALUE =@ testCollection.Id/＆GT;
 

解决方案

 ＆LT;输入类型=复选框ID =[@我]NAME =ChosenTestCollectionIds值= @ testCollection.Id/＆GT;
 

I have a view model with a from that includes a set of checkboxes. I need the check boxes to map to an array when binding in the post back method of my controller.

Here's the view model.

@model TMDM.Models.TestSeriesCreateViewModel

@{
    ViewBag.Title = "Create";
}

<h2>Create a Test Series</h2>


@using (Html.BeginForm()) {
    @Html.ValidationSummary(true)
    <fieldset>

        <div class="editor-label">
            @Html.LabelFor(model => model.Title)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.Title)
            @Html.ValidationMessageFor(model => model.Title)
        </div>

        <h3>Which Test Collections are in this Test Series?</h3>
        <div class="editor-field">
        @{
            var i = 0;
            foreach (var testCollection in Model.TestCollections)
            {
                <input type="checkbox" id="ChosenTestCollectionIds[@i]" name="ChosenTestCollectionIds[@i]" value="@testCollection.Id" />
                <span>@testCollection.Title</span>
                <br />
                i++;
            }
         }
        </div>

        <p>
            <input type="submit" value="Save" class="medium green awesome" />
            @Html.ActionLink("Cancel", "Index", "TestSeries", null, new { @class = "medium black awesome" })
        </p>
    </fieldset>

The form is rendering fine, I've checked the source and each output check box has a different number for their id and name fields.

<input type="checkbox" id="ChosenTestCollectionIds[0]" name="ChosenTestCollectionIds[0]" value="5" />
<input type="checkbox" id="ChosenTestCollectionIds[1]" name="ChosenTestCollectionIds[1]" value="6" />
//etc...

Here is the view model.

public class TestSeriesModel
{
    public int Id { get; set; }
    public string Title { get; set; }
}

public class TestSeriesCreateViewModel : TestSeriesModel
{
    public List<ITestCollectionDataObject> TestCollections { get; set; }
    public int[] ChosenTestCollectionIds { get; set; }
}

Problem I'm having is that when the form posts back the ChosenTestCollectionIds array comes back null. What am I doing wrong here?

ANSWER

I've worked out how to do it:

<input type="checkbox" id="[@i]" name="ChosenTestCollectionIds" value="@testCollection.Id" />

解决方案

<input type="checkbox" id="[@i]" name="ChosenTestCollectionIds" value="@testCollection.Id" />

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