C＃MVC模型綁定嵌套列表

Question

我的模型綁定有問題。 在這里獲得以下型號：

public class RoomScan
{
    public RoomScan() { }

    public RoomScan(Guid id)
    {
        Room_ID = id;
        Assets = new List<AssetScanModel>();
    }
    //public Guid Soll_ID { get; set; }
    public Guid Room_ID { get; set; }
    public List<AssetScanModel> Assets { get; set; }

    [Display(Name = "Barcode", ResourceType = typeof(Dictionary))]
    public string Barcode { get; set; }

    [Display(Name = "RFID", ResourceType = typeof(Dictionary))]
    public string RFID { get; set; }
}

public class AssetScanModel
{
    public AssetScanModel(Asset asset)
    {
        Asset = asset;
        Scanned = false;
        CheckIn = false;
    }

    public Asset Asset { get; set; }

    [Display(Name = "Scanned", ResourceType = typeof(Dictionary))]
    public bool Scanned { get; set; }

    [Display(Name = "CheckIn", ResourceType = typeof(Dictionary))]
    public bool CheckIn { get; set; }
}

該視圖確實列出了所有資產：

using (Html.BeginForm("Scan", "Inventory", FormMethod.Post))
{
Html.HiddenFor(rs => rs.Room_ID);
Html.HiddenFor(rs => rs.Assets);

<div>
    <div class="editor-label">Barcode</div>
    <div class="editor-field"><input type="text" name="Barcode" value="@Model.Barcode" /></div>
</div>
<div>
    <div class="editor-label">RFID</div>
    <div class="editor-field"><input type="text" name="Barcode" value="@Model.RFID" /></div>
</div><br />

...

@for (int i = 0; i < Model.Assets.Count; i++)
{
    <tr>
        <td>@Html.DisplayFor(asm => asm.Assets[i].Asset.InventoryNumber)</td>
        <td>@Html.DisplayFor(asm => asm.Assets[i].Asset.Description)</td>
        <td>@Html.DisplayFor(asm => asm.Assets[i].Asset.Manufacturer)</td>
        <td>@Html.DisplayFor(asm => asm.Assets[i].Asset.Model)</td>
        <td>@Html.DisplayFor(asm => asm.Assets[i].Asset.SerialNumber)</td>
        <td>@Html.DisplayFor(asm => asm.Assets[i].Scanned)</td>
        <td>@Html.DisplayFor(asm => asm.Assets[i].CheckIn)</td>
    </tr>
}

我添加了“ Asset [i]”，因為我在某處讀到它有助於默認模型綁定器正確綁定（didn＃t工作）

我的問題是：在我的控制器中：

[HttpPost]
    public ActionResult Scan(RoomScan toVerify)

列表為空（不為null）。 我知道這與模型聯編程序有關，但是我不熟悉如何對其進行更改以使其起作用。

Answer 1

我一直在用它來綁定帶有嵌套列表的復雜模型。 我幾乎總是立即用這個替換默認的模型裝訂器。

一個可以更新復雜模型圖的DefaultModelBinder

希望這對您有所幫助。

Answer 2

嘗試使用DisplayTemplates / EditorTemplates，為您的嵌套模型類型創建模板。 在視圖中寫道：

@Html.DisplayFor(asm => asm.Assets)

在DisplayTemplate（AssetScanModel.cshtml）中：

@model AssetScanModel

<tr>
    <td>@Html.DisplayFor(asm => asm.Asset.InventoryNumber)</td>
    <td>@Html.DisplayFor(asm => asm.Asset.Description)</td>
    <td>@Html.DisplayFor(asm => asm.Asset.Manufacturer)</td>
    <td>@Html.DisplayFor(asm => asm.Asset.Model)</td>
    <td>@Html.DisplayFor(asm => asm.Asset.SerialNumber)</td>
    <td>@Html.DisplayFor(asm => asm.Scanned)</td>
    <td>@Html.DisplayFor(asm => asm.CheckIn)</td>
</tr>