使用Html.BeginForm()ASP.NET MVC,Model为null

Question

我遇到了以下问题:
用户访问网站,点击"添加",然后发送回Controller,模型被检索并再次发送给View.在内部视图中,我检查Model是否为null并显示数据.

@if (Model != null)
    {
        <div id="appInfo">
            <table>
                <tr>
                    <th>@Html.DisplayNameFor(x => Model.tytul)</th>
                    <th>@Html.DisplayNameFor(x => Model.kategoria.nazwa)</th>
                    <th>@Html.DisplayNameFor(x => Model.liczba_ocen)</th>
                    <th>@Html.DisplayNameFor(x => Model.avg_ocena)</th>
                    <th>@Html.DisplayNameFor(x => Model.typ)</th>
                </tr>
                <tr>
                    <td>@Model.tytul</td>
                    <td>@ViewData["kategoria"]</td>
                    <td>@Model.liczba_ocen</td>
                    <td>@Model.avg_ocena</td>
                    <td>@Model.typ</td>
                </tr>
            </table>
        </div> 
 <div>
                @using (Html.BeginForm("Confirm", "Wydawca", new { app = @Model }))
                {
                    <input type="submit" value="Cofirm it" />
                }
            </div>

在结束按钮上创建"确认它",单击它后会调用确认方法,但应用变量始终为空.如果我将其值设置为除模型之外的任何值.

    [HttpPost]
    public ActionResult Confirm(aplikacja app)
    {
        ...
    }

在创建按钮"确认它"模型不为空时,我检查了.你碰巧知道出了什么问题吗？

生成的HTML

   <form action="/Wydawca/Confirm?app=Adds.Models.aplikacja" method="post">      
   <input type="submit" value="Zatwierd?" />

Answer 1

本Html.BeginForm应环绕你所有的投入要素,或者它没有任何发布.将您的观点更改为:

@if (Model != null)
{
    @using (Html.BeginForm("Confirm", "Wydawca", new { app = @Model }))
    {
        <div id="appInfo">
            <table>
                <tr>
                    <th>@Html.DisplayNameFor(x => Model.tytul)</th>
                    <th>@Html.DisplayNameFor(x => Model.kategoria.nazwa)</th>
                    <th>@Html.DisplayNameFor(x => Model.liczba_ocen)</th>
                    <th>@Html.DisplayNameFor(x => Model.avg_ocena)</th>
                    <th>@Html.DisplayNameFor(x => Model.typ)</th>
                </tr>
                <tr>
                    <td> @Model.tytul</td>
                    <td>@ViewData["kategoria"]</td>
                    <td>@Model.liczba_ocen</td>
                    <td>@Model.avg_ocena</td>
                    <td>@Model.typ</td>
                </tr>
            </table>
        </div> 
        <div>
            @Html.HiddenFor(x => Model.tytul)
            @Html.HiddenFor(x => Model.kategoria.nazwa)
            @Html.HiddenFor(x => Model.liczba_ocen)
            @Html.HiddenFor(x => Model.avg_ocena)
            @Html.HiddenFor(x => Model.typ)
            <input type="submit" value="Cofirm it" />
        </div>
    }
}