如何从视图 http post 将列表模型传递给控制器

How to pass List model to controller from view http post

我有一个 CategoryModel,其中包含 ItemModel 的列表项以及一些其他字符串等

我正在尝试将列表从视图传递到控制器。视图上的模型是 ABCModel,它包含类型 CategoryModel 的 'Categories' 列表。在视图中,我只希望 post 'active' 类别返回保存。

当我这样做时,活动类别被传递,其中包含从表单添加的详细信息,但项目列表为空。

.cs 模型

    namespace Company.Models
    {
        public class ABCModel
        {
            public IList<CategoryModel> Categories;
            public SummaryModel Summary;
        }
    }
    
    namespace Company.Models
    {
    public class CategoryModel
    {
        public string Label { get; set; }
        public bool Active { get; set; }
        public decimal Amount { get; set; }
        public string Frequency { get; set; }
        public string Type { get; set; }
        public List<ItemModel> Items;
    }
    )
    
    namespace Company.Models
    {
    public class ItemModel
    {
        public string Label { get; set; }
        public string Explanation { get; set; }
        public string Amount { get; set; }
        public string Frequency { get; set; }
        public bool Flag { get; set; }
        public string Note { get; set; }
    }
    }

控制器

    [HttpPost]
        public ActionResult SaveItems([FromForm] CategoryModel activeCategoryModel, [FromForm] List<ItemModel> items, [FromQuery] string activecategory, [FromQuery] string nextcategory)
        {
        ...
        }

查看

    @model ABCModel

    @{ CategoryModel nextCategory = null; }
    @{ CategoryModel activeCategoryModel = null; }
    
    @if (Model.Categories.Any())
    {
        @for (var i = 0; i < Model.Categories.Count; i++)
        {
            Company.Models.CategoryModel category = Model.Categories[i];
    
            @if (category.Active)
            {
                activeCategoryModel = category;
                if ((i + 1 < Model.Categories.Count) && (Model.Categories[i + 1] != null))
                {
                    nextCategory = Model.Categories[i + 1];
                }
            }
        }
    }
    
    <form id="ABC-form" class="needs-validation" novalidate="" asp-action="SaveItems" asp-controller="Home" method="post">
    
            @if (activeCategoryModel != null)
            {
                <input asp-for="@activeCategoryModel.Label" type="hidden" />
                <input asp-for="@activeCategoryModel.Active" type="hidden" />
                <input asp-for="@activeCategoryModel.Amount" type="hidden" />
                <input asp-for="@activeCategoryModel.Frequency" type="hidden" />
                <input asp-for="@activeCategoryModel.Type" type="hidden" />

                @if (activeCategoryModel.Items.Any())
                {    
                    @for (var i = 0; i < activeCategoryModel.Items.Count; i++)
                    {
                        @Html.HiddenFor(x => activeCategoryModel.Items[i].Label)
                        @Html.HiddenFor(x => activeCategoryModel.Items[i].Explanation)
                        @Html.TextBoxFor(x => items[i].Amount, new { @class = "form-control" })
                    }
                }
            }
        <button id="continue" type="submit" asp-action="SaveItems" asp-route-activecategory="@activeCategoryModel.Label" asp-route-nextcategory="@(nextCategory != null ? nextCategory?.Label : null)">Continue</button>
    </form>

我一直将 IFormCollection 作为参数包含在控制器的 SaveItems 中,这表明项目正在以我认为可行的格式传递,但模型只显示输入的值和项目列表为空。

如何从视图中填充活动类别模型中的项目列表?

Items in CategoryModel 应该是 属性 而不是归档,所以你的 CategoryModel 应该如下所示:

public class CategoryModel
{
    public string Label { get; set; }
    public bool Active { get; set; }
    public decimal Amount { get; set; }
    public string Frequency { get; set; }
    public string Type { get; set; }
    public List<ItemModel> Items { get; set; }
}