null对象从foreach内部的textarea传递到onsost的值时（对象是可以的）

Question

我有以下CSHTML类：

@model WorkInProgress.Pages.Expenditures
<thead>
<tr>
    <th class = text-start>Task Number</th>
    <th class = text-start>Expenditure Type</th>
    <th class = text-end>Item Date</th>
    <th class = text-end>Billable</th>
    <th class = text-end>Vendor Id</th>
    <th></th>
    <th class = text-start>Vendor Name</th>
    <th class = text-end>Revenue Amount</th>
    <th class = text-end>Comments</th>
</tr>
</thead>
<tbody>

@foreach (var expenditure in Model.ExpendituresList)
{
    <tr>
        <td class = text-start>@expenditure.TaskNumber</td>
        <td class = text-start>@expenditure.ExpenditureType</td>
        <td class = text-end>@expenditure.ExpenditureItemDate.ToString("dd-MMM-yyyy")</td>
        <td class = text-end>@expenditure.BillableFlag</td>
        <td class = text-end>@expenditure.VendorId</td>
        <td></td>
        <td class = text-start>@expenditure.SupplierName</td>
        <td class = text-end>@expenditure.ProjFuncRevenueAmount</td>
        @Html.HiddenFor(model => expenditure.ExpenditureItemId)
        <td class=text-end>
            <textarea class="form-control" asp-for="@Model.ExpendituresList.FirstOrDefault(x => x.ExpenditureItemId == expenditure.ExpenditureItemId)!.ExpenditureComment"  rows="1"></textarea>
        </td>
    </tr>
}
</tbody>
<div class="form-control">
    <button type="submit" class="btn btn-primary" asp-page-handler="Button">Save</button></div>

我试图拥有类似的东西：

然后从那里捕获文本中的文本，并将其发送给带有文本的值（我想要的值） <代码> expenditurecomment 填充

支出的类是

 [BindProperty(SupportsGet = true)]  
        public IEnumerable<Expenditure> ExpendituresList { get; set; }

公共十进制eppenturetemidemid {get; set; ;}

在单击“保存”对象elevenitulist时，

我认为我的问题是我设置＆lt; textarea＆gt;元素。但是我一直在尝试不同的设置，无法使其正常工作

Answer 1

我同意@pcalkins，并且由于您需要在表中发布所有行，因此您需要确保＆lt; textarea＆gt;具有独特的名称以确保所有行都能可以提交，因此您必须使用@for而不是@foreach。

我在我的身边进行了测试，请注意我定义了list＆lt; eppenditures＆gt;，而不是ienumerable

public class Expenditures
{
    public int ExpenditureItemId { get; set; }
    public string? ExpenditureComment { get; set; }
}

public class ViewMode {
    public List<Expenditures> ExpendituresList { get; set; }
}

，这是我的页面：

@model ViewMode
<form method="post" asp-action="saveData">
<table>
    <thead>
    <tr>
        <th class = text-start>Task Number</th>
        <th class = text-end>Comments</th>
    </tr>
    </thead>
    <tbody>
    @for (var x = 0; x < Model.ExpendituresList.Count(); x++)
    {
        <tr>
            <td class = text-start asp-for="@Model.ExpendituresList[x].ExpenditureItemId">@Model.ExpendituresList[x].ExpenditureItemId</td>
            <td class=text-end>
                <textarea class="form-control" asp-for="@Model.ExpendituresList[x].ExpenditureComment"  rows="1"></textarea>
            </td>
        </tr>
    }
    </tbody>
</table>
<div class="form-control">
    <button type="submit" class="btn btn-primary">Save</button>
</div>
</form>

这是我的控制器：

    [HttpPost]
    public void saveData( ViewMode vms)
    {
        var a = vms;
    }