asp.net - 如何将值传递给部分标签助手？ (ASP.NET 核心)

Question

我正在尝试在表单中呈现局部 View ，我需要使用循环的值(当然是 +1，因为它从 0 开始)作为我局部中的值之一，任何想法如何使这项工作?

我已经尝试使用 ViewData 或 ViewBag 来做到这一点，但要么这是错误的方法，要么是我执行错误

这是我的主要形式:

@model Measurement

<form asp-action="Create" method="post">
    <div class="form-group" hidden>
        <label asp-for="LymphSiteId"></label>
        <input asp-for="LymphSiteId" value=@ViewBag.Id />
        <span asp-validation-for="LymphSiteId"></span>
    </div>
    <div class="form-group" hidden>
        <label asp-for="UserId"></label>
        <input asp-for="UserId" value="1" />
        <span asp-validation-for="UserId"></span>
    </div>
    <div class="form-group">
        <label asp-for="MeasurementDate"></label>
        <input asp-for="MeasurementDate" />
        <span asp-validation-for="MeasurementDate"></span>
    </div>

    @for (int i = 0; i < ViewBag.NumMeasuringPoints; i++)
    {
        <partial name="_New" view-data=@(i+1) />
    }
    <button type="submit">Submit</button>
</form>

这是我的部分:

@model Circumference
    <div class="form-group" hidden>
        <input asp-for="Id" />
    </div>
    <div class="form-group" hidden>
        <input asp-for="MeasurementId" value="@ViewBag.Id" />
    </div>
    <div class="form-group">
        <label asp-for="PositionFromStart">Position from Start</label>
        <input asp-for="PositionFromStart" value="@ViewData" />
    </div>
    <div class="form-group">
        <label asp-for="DistanceAround">Circumference at point (cm)</label>
        <input asp-for="DistanceAround" />
    </div>

非常感谢任何帮助 - 谢谢!

Answer 1

I'm trying to render a partial view inside a form, I need to use the value of the loop (+1 of course because it starts at 0) as one of the values in my partial, any ideas how I can make this work?

您可以尝试修改如下代码以分配一个 ViewDataDictionary 以传递给您的局部 View 。

在主要形式

@for (int i = 0; i < ViewBag.NumMeasuringPoints; i++)
{
    ViewData["PositionFromStart"] = i + 1;

    var pmodel = new Circumference();

    <partial name="_New" model="pmodel" view-data="ViewData" />
}

部分观点

@model Circumference

<div class="form-group" hidden>
    <input asp-for="Id" />
</div>
<div class="form-group">
    <input asp-for="MeasurementId" value="@ViewBag.Id" />
</div>
<div class="form-group">
    <label asp-for="PositionFromStart">Position from Start</label>
    <input asp-for="PositionFromStart" value="@ViewData["PositionFromStart"]" />
</div>
<div class="form-group">
    <label asp-for="DistanceAround">Circumference at point (cm)</label>
    <input asp-for="DistanceAround" />
</div>