如何将视图从视图传递到控制器

Question

将对象中的列表从视图传递到控制器时遇到问题,列表始终为null.我该怎么做？

我的模特:

public class ImageModel
{
    public int id { get; set; }
    public string url { get; set; }
    public bool delete { get; set; }
}

public class SchoolImages
{
    public Nullable<int> schoolid { get; set; }
    public IList<ImageModel> images;
}

风景:

@model SchoolAppManager.Models.SchoolImages

@using (Html.BeginForm("DeleteImages", "Images"))
{

    @Html.HiddenFor(x => x.schoolid)
    <table>
    @for (int i = 0; i < Model.images.Count(); i += 4) {

        <tr>
            <td>
                <img src="@Url.Content(Model.images[i].url)" width="50%" />
                <br />
                @Html.CheckBoxFor(x => x.images[i].delete)
                @Html.HiddenFor(x => x.images[i].id)
            </td>
            <td>
                @if (i + 1 < Model.images.Count())
                {
                    <img src="@Url.Content(Model.images[i + 1].url)" width="50%" />
                    <br />
                    @Html.CheckBoxFor(x => x.images[i + 1].delete)
                    @Html.HiddenFor(x => x.images[i + 1].id)
                }
            </td>
            <td>
                @if (i + 2 < Model.images.Count())
                {
                    <img src="@Url.Content(Model.images[i + 2].url)" width="50%" />
                    <br />
                    @Html.CheckBoxFor(x => x.images[i + 2].delete)
                    @Html.HiddenFor(x => x.images[i + 2].id)
                }
            </td>
            <td>
                @if (i + 3 < Model.images.Count())
                {
                    <img src="@Url.Content(Model.images[i + 3].url)" width="50%" />
                    <br />
                    @Html.CheckBoxFor(x => x.images[i + 3].delete)
                    @Html.HiddenFor(x => x.images[i + 3].id)
                }
            </td>
        </tr>
    }
    </table>

    <input type="submit" value="delete" />
}

当我单击delete时,SchoolImages传递给控制器​​,在控制器中SchoolImages.schoolId有值,但是SchoolImages.images为null.我怎样才能传递SchoolImages.images到控制器？

Answer 1

默认模型绑定器不适用于字段,因此请创建images一个属性:

public IList<ImageModel> images { get; set; }