Question

当我尝试从视图发送到控制器时，我遇到了对象的空列表问题， jobOffertModel参数为null

这是我的控制器方法:(我知道它不是什么，但我正在测试参数）

[HttpPost]
public ActionResult AcceptJobOfferts(IEnumerable<JobOffertModel> jobOffertModel)
{
    initBusinessObjects();

    return View();
}

以下是我的观点：

@model IEnumerable<TCCApplication.Models.JobOffertModel>

@{
    ViewBag.Title = "Minhas ofertas de trabalho";
}

<h2>@ViewBag.Title</h2>


@using (Html.BeginForm("AcceptJobOfferts","Professional")){

<div class="row">
    <div class="col-md-9">
        @foreach (var item in Model)
        {
            <div class="row">
                <div class="col-md-2">
                    <label>Oferta: </label>
                    @Html.DisplayFor(itemModel => item.Description)
                </div>

                @if (item.Acepted)
                {
                    <div class="col-md-2">
                        <label>Aceitar?</label>
                        @Html.DisplayFor(itemModel => item.Acepted)
                    </div>
                }
                else
                { 
                    <div class="col-md-2">
                        <label>Aceitar?</label>
                        @Html.EditorFor(itemModel => item.Acepted)
                    </div>
                }
                <div class="col-md-2">
                    <label>Ativa</label>
                    @Html.DisplayFor(itemModel => item.Active)
                </div>
                <div class="col-md-3">
                    <label>Data do trabalho</label>
                    @Html.DisplayFor(itemModel => item.JobDate)
                </div>
            </div>
        }
    </div>

    <div class="col-md-2">
        <input type="submit" value="Aceitar ofertas de trabalho"/>
    </div>

</div>

}

用户使用此方法进行查看：

public ActionResult ViewMyJobOfferts(int professionalId)
{
    initBusinessObjects();

    var professionalJobOfferts = jobOffertBusiness.GetJobOffertsByProfessional(professionalId);

    return View(professionalJobOfferts);
}

Answer 1

替换此行：

 @using (Html.BeginForm("AcceptJobOfferts","Professional")){

人：

 @using (Html.BeginForm("AcceptJobOfferts","Professional", FormMethod.Post)){

Answer 2

改变我所做的事情 -

使用名为modelList的变量将IEnumerable转换为List（）。
用于循环以显示所有属性值。
使用隐藏字段仅保留POST操作的显示元素属性。
将POST控制器操作的参数名称更改为modelList。

你必须得到这样的观点 -

@model IEnumerable<TCCApplication.Models.JobOffertModel>

@{
    ViewBag.Title = "Minhas ofertas de trabalho";
}

<h2>@ViewBag.Title</h2>


@using (Html.BeginForm("AcceptJobOfferts","Professional", FormMethod.Post)){
var modelList = Model.ToList();
<div class="row">
    <div class="col-md-9">
        for (int i = 0; i < modelList.Count; i++)
        {
            <div class="row">
                <div class="col-md-2">
                    <label>Oferta: </label>
                    @Html.DisplayFor(itemModel => modelList[i].Description)
                    @Html.HiddenFor(itemModel => modelList[i].Description)
                </div>

                @if (modelList[i].Acepted)
                {
                    <div class="col-md-2">
                        <label>Aceitar?</label>
                        @Html.DisplayFor(itemModel =>  modelList[i].Acepted)
                        @Html.HiddenFor(itemModel =>  modelList[i].Acepted)
                    </div>
                }
                else
                { 
                    <div class="col-md-2">
                        <label>Aceitar?</label>
                        @Html.EditorFor(itemModel =>  modelList[i].Acepted)
                    </div>
                }
                <div class="col-md-2">
                    <label>Ativa</label>
                    @Html.DisplayFor(itemModel => modelList[i].Active)
                    @Html.HiddenFor(itemModel => modelList[i].Active)
                </div>
                <div class="col-md-3">
                    <label>Data do trabalho</label>
                    @Html.DisplayFor(itemModel =>  modelList[i].JobDate)
                    @Html.HiddenFor(itemModel =>  modelList[i].JobDate)
                </div>
            </div>
        }
    </div>

    <div class="col-md-2">
        <input type="submit" value="Aceitar ofertas de trabalho"/>
    </div>

</div>

}

然后你的控制器应该是 -

[HttpPost]
public ActionResult AcceptJobOfferts(IEnumerable<JobOffertModel> modelList)
{
    initBusinessObjects();

    return View();
}

View正在发送一个空对象列表

2 个答案: