这是视图模型。

@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>

表单呈现正常，我已经检查了源代码，每个输出复选框的id和name字段都有不同的数字。

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

这是视图模型。

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; }
}

我遇到的问题是，当表单发回ChosenTestCollectionIds数组时，返回null。我在这里做错了什么？

回答

我已经弄清楚如何做：

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