Html.BeginForm()没有传递模型

Question

我有以下cshtml表单：

model Scraper.Facade.PlayerRow

@using (Html.BeginForm("Calculate", "Home", FormMethod.Post))
{
<table class="table table-striped table-bordered table-condensed table-responsive table-hover">
    @foreach (var player in Model.AttribsPlayerLine)
    {
        <thead>
            <tr class="success">
                @foreach (var attrib in player.AttribsPlayerList)
                {
                    //@Html.DisplayNameFor(x => Model.tytul)
                    <th data-field="@attrib.attribName">@Html.DisplayFor(x => attrib.attribName) </th>
                }
            </tr>
            <tr class="active">
                @foreach (var attrib in player.AttribsPlayerList)
                {
                    <td data-field="@attrib.attribValue">@Html.TextBoxFor(x => attrib.attribValue)</td>
                }
            </tr>
        </thead>

    }
</table>

<input class="btn-danger"  type="submit" name="Next >>" value="Next >>" />
}

它正确地显示，然后我尝试在下面的控制器ActionResult中获得模型

[HttpPost]
public ActionResult Calculate(PlayerRow model)
{
    GenericHelper _genericHelper = new GenericHelper();
    return View();
}

但是，PlayerRow模型始终为空。

我做错了什么？

这是我的模型定义

public PlayerRow LoadHtmlDoc(string fileLocation)
{
        List<Attrib> attribsHeaderList = new List<Attrib>();
        var playerRow = new PlayerRow();
        playerRow.AttribsPlayerLine = new List<AttribLine>();

        var htmlDoc = new HtmlDocument { OptionFixNestedTags = true };

        // There are various options, set as needed

        // filePath is a path to a file containing the html
        htmlDoc.Load(fileLocation);
}

public class PlayerRow
{
    public List<AttribLine> AttribsPlayerLine; 

}

更新

大家好，我稍微改变了我的应用程序的逻辑，基本上有两个列表，其中有标题属性，以及所有玩家的属性，所以现在只有两个类，我像这样修改了cshtml，它现在正在工作:-

@using (Html.BeginForm("Calculate", "Home", FormMethod.Post, new { enctype =        "multipart/form-data" }))
{
<table class="table table-striped table-bordered table-condensed table-responsive table-hover">
    <tr>
        @for (int k = 0; k < Model.HeaderAttributes.Count; k++)
        {
            <td>
                @Html.DisplayFor(x => x.HeaderAttributes[k].AttributeName)
                @Html.HiddenFor(x => x.HeaderAttributes[k].AttributeName)
            </td>
        }
    </tr>


    @for (int i = 0; i < Model.PlayerList.Count; i++)
    {
        <tr>
            <td>
                @Html.DisplayFor(x => x.PlayerList[i].PlayerName)
                @Html.HiddenFor(x => x.PlayerList[i].PlayerName)
            </td>
            @for (int j = 0; j < Model.PlayerList[i].AttributesList.Count; j++)
            {
                <td>
                    @Html.DisplayFor(x => x.PlayerList[i].AttributesList[j].AttributeValue)
                    @Html.HiddenFor(x => x.PlayerList[i].AttributesList[j].AttributeValue)
                </td>
            }
        </tr>
    }

</table>


<input class="btn-danger" type="submit" name="Next >>" value="Next >>" />
}

现在我的问题是，谁来奖励答案，因为我可以说，大多数答案都对我的解决方案很有帮助。

Answer 1

下面是你想要做的事情的一个例子。我尽我所能找到你。

让我们从简化模型开始：

public class PlayerRow
{
    public List<AttribLine> AttribsPlayerLine { get; set; }
}

public class AttribLine
{
    public string attribName { get; set; }
    public string attribValue { get; set; }
}

注意，在每个模型属性上包含{ get；set；}很重要，这样模型绑定器就知道它在块上进行绑定。

下面是一个简化的视图，只查看form()部分：

@using (Html.BeginForm("Calculate", "PlayerRow", FormMethod.Post))
{
    <table>
        @*/*Build out header*/*@
        <tr>
            @foreach (AttribLine a in Model.AttribsPlayerLine)
            {
                <th>@Html.Label("title", a.attribName)</th>
            }
        </tr>
        @*/* Add row of our player attributes */*@
        <tr>
            @foreach (AttribLine a in Model.AttribsPlayerLine)
            {
                using (Html.BeginCollectionItem("AttribsPlayerLine"))
                {
                    <td>
                        @Html.TextBox("attribValue", a.attribValue)
                        @Html.Hidden("attribName", a.attribName)
                        @*
                           /* Add any more [AttribLine] properties as hidden here */
                        *@
                    </td>
                }
            }
        </tr>
    </table>
    <input class="btn-danger" type="submit" name="Next >>" value="Next >>" />
}

请注意，在这里必须确保即使属性不是用户可编辑的，它也需要作为隐藏元素包含在我们的CollectionItem中，这样模型绑定器就可以在POST上设置它。

希望这能有所帮助。

Answer 2

您正在正确地将模型传递到视图，但是一旦它到达视图，模型数据基本上将被‘清除’，除非您编辑它或将它传递到下一个控制器，在这种情况下，“计算”。

我不确定要将视图模型的哪些部分传递给控制器，但您可以始终使用以下方法：

  @Html.HiddenFor(model => model.DataYouWantPassedToController)

现在，如果要编辑/更改，可以始终使用这些项传递数据：

  @Html.EditorFor(model => model.DataYouWantToEditAndPass)... and so on.

如果您在不更改或传递数据的情况下对数据进行简单循环，就像在@foreach中所做的那样，数据将在“Post”方法中丢失。

Answer 3

尝试使用这样的@Html.EditorForModel()：

@model Scraper.Facade.PlayerRow

@using (Html.BeginForm("Calculate", "Home", FormMethod.Post))
{
    @Html.EditorForModel()

    <input class="btn-danger"  type="submit" name="Next >>" value="Next >>" />
}

在PlayerRow.cshtml /Shared/EditorTemplate文件夹上创建一个名为PartialView的文件，并添加以下代码：

    @model Scraper.Facade.PlayerRow
    <table class="table table-striped table-bordered table-condensed table-responsive table-hover">
        @foreach (var player in Model.AttribsPlayerLine)
        {
            <thead>
                <tr class="success">
                    @foreach (var attrib in player.AttribsPlayerList)
                    {
                        //@Html.DisplayNameFor(x => Model.tytul)
                        <th data-field="@attrib.attribName">@Html.DisplayFor(x => attrib.attribName) </th>
                    }
                </tr>
                <tr class="active">
                    @foreach (var attrib in player.AttribsPlayerList)
                    {
                        <td data-field="@attrib.attribValue">@Html.TextBoxFor(x => attrib.attribValue)</td>
                    }
                </tr>
            </thead>

        }
    </table>

我认为这会对你有帮助。