ASP.NET MVC post模型始终为null

Question

我有一个我正在构建的ASP.NET MVC应用程序,我无法弄清楚为什么被回发的模型总是为空.

CSHTML:

<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
    @Html.HiddenFor(model => model.TotalItemCategoryId, new { htmlAttributes = new { @class = "form-control" } })
</div>

<div class="form-group">
    @Html.LabelFor(model => model.Label, htmlAttributes: new { @class = "control-label col-md-2" })
    <div class="col-md-10">
        @Html.EditorFor(model => model.Label, new { htmlAttributes = new { @class = "form-control" } })
        @Html.ValidationMessageFor(model => model.Label, "", new { @class = "text-danger" })
    </div>
</div>

<div class="form-group">
    @Html.LabelFor(model => model.Value, htmlAttributes: new { @class = "control-label col-md-2" })
    <div class="col-md-10">
        @Html.EditorFor(model => model.Value, new { htmlAttributes = new { @class = "form-control" } })
        @Html.ValidationMessageFor(model => model.Value, "", new { @class = "text-danger" })
    </div>
</div>

<div class="form-group">
    @Html.HiddenFor(model => model.Quantity, new { htmlAttributes = new { @class = "form-control" } })
</div>

<div class="form-group">
    @Html.HiddenFor(model => model.QuoteId, new { htmlAttributes = new { @class = "form-control" } })
</div>

<div class="form-group">
    @Html.HiddenFor(model => model.TotalTemplateId, new { htmlAttributes = new { @class = "form-control" } })
</div>

<div class="form-group">
    @Html.HiddenFor(model => model.AllowDataEntry,new{@readonly="readonly"})
</div>

<div class="form-group">
    @Html.HiddenFor(model => model.IsMiscellaneous) 
</div>

我查看了表单,所有字段在发布时都有正确的值.就在它到达控制器时,它总是为空.有人可以帮我解决这个问题.

型号类:

public class TotalItemValue:IEntity
{
    public int Id { get; set; }

    public int? TotalItemCategoryId { get; set; }

    [StringLength(125)]
    public string Label { get; set; }

    public decimal? Value { get; set; }
    public int? Quantity { get; set; }
    public int QuoteId { get; set; }
    public int? TotalTemplateId { get; set; }

    public bool AllowDataEntry { get; set; }
    public bool IsMiscellaneous { get; set; }

    public TotalItemCategory TotalItemCategory { get; set; }
    public TotalTemplate TotalTemplate { get; set; }
}

控制器:

public ActionResult CreateMiscellaneousItem(int quoteId)
{
    TotalItemValue totalItemValue = _expressionTotalService.CreateMiscellaneousItem(quoteId);
    return View(totalItemValue);
}

[HttpPost]
public ActionResult CreateMiscellaneousItem( TotalItemValue value)
{
    _expressionTotalService.SaveMiscellaneousItem(value);

    return RedirectToAction("Totals", new{quoteId=value.QuoteId});
}

Answer 1

它为null,因为您的模型包含一个名为的属性,value并且您还在valuePOST方法中为模型命名了参数.

您必须QuoteId在TotalItemValue模型中添加Property,只需将请求参数名称从更改value为model.

试试这个 :

public class TotalItemValue:IEntity
{
      ...
      public int QuoteId{ get; set; }
      ...
}


[HttpPost]
    public ActionResult CreateMiscellaneousItem(TotalItemValue model)
    {
       ...
       _expressionTotalService.SaveMiscellaneousItem(model);

       return RedirectToAction("Totals", new{model.QuoteId});
    }

视图

@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <h4>TotalItemValue</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.TotalItemCategoryId, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.TotalItemCategoryId, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.TotalItemCategoryId, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Label, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Label, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Label, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Value, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Value, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Value, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Quantity, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Quantity, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Quantity, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.QuoteId, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.QuoteId, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.QuoteId, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.TotalTemplateId, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.TotalTemplateId, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.TotalTemplateId, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.AllowDataEntry, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                <div class="checkbox">
                    @Html.EditorFor(model => model.AllowDataEntry)
                    @Html.ValidationMessageFor(model => model.AllowDataEntry, "", new { @class = "text-danger" })
                </div>
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.IsMiscellaneous, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                <div class="checkbox">
                    @Html.EditorFor(model => model.IsMiscellaneous)
                    @Html.ValidationMessageFor(model => model.IsMiscellaneous, "", new { @class = "text-danger" })
                </div>
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}