如何将值传递到部分标签助手中?(ASP.NET Core) [英] How to pass a value into partial tag helper? (ASP.NET Core)

问题描述

我正在尝试在表单内渲染局部视图，我需要将循环的值(当然，+ 1是因为它从0开始)用作我的局部视图中的值之一，我想如何使这项工作吗?

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?

我尝试使用ViewData或ViewBag做到这一点，但这要么是错误的方法，要么是我实现错误了

I've tried to do this with ViewData or ViewBag but either this is the wrong method or I'm implementing it wrong

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>

这是我的部分内容:

@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！

Any help greatly appreciated - thanks!

推荐答案

我正在尝试在表单内渲染局部视图，我需要将循环的值(当然是+1，因为它从0开始)用作我的局部视图中的值之一，我想如何使这项工作吗?

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?

您可以尝试修改以下代码，以分配ViewDataDictionary传递给局部视图.

You can try to modify the code like below to assigns a ViewDataDictionary to pass to your partial view.

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" />
}

局部视图

@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>

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