用于列表项的 Asp.net 剃刀文本框数组 [英] Asp.net razor textbox array for list items

问题描述

我无法找到或弄清楚如何获取项目列表(纸杯蛋糕)并将它们显示在带有数量字段的剃刀中.

发生的事情是我无法获取列表中每个纸杯蛋糕数量的值.你可以在 Razor 中做文本框数组吗?

查看

<label>纸杯蛋糕</label>@foreach(Model.CupcakeList 中的 var cupcake){@Html.TextBox("CupcakeQuantities", cupcake.Id) @cupcake.Name 
}

模型

公共列表CupcakeList { 得到;放;}公共列表纸杯蛋糕数量 { 得到；放;}

控制器

public ActionResult Create(){var 模型 = new PartyBookingModel(){CupcakeList = db.Cupcakes.ToList(),CupcakeQuantities = new List()};返回视图(模型)；}

纸杯蛋糕(实体)

公共类纸杯蛋糕{公共 int Id { 获取；放;}公共字符串名称 { 获取；放;}公共十进制 PerDozen { 得到；放;}}

解决方案

您必须使用索引，而不是 foreach 才能使其工作.

@for (int i = 0; i Model.CupcakeQuantities[i]) @Model.CupcakeList[i].Name <br/>}

这将创建按顺序命名+编号的条目，这些条目将在回发时重新组合回模型中.

我意识到这看起来像是为什么 foreach 不起作用?"，但是对于 foreach，TextBoxFor 没有足够的反射信息(因为它只是单个对象)，而数组索引是通过反射从 Model.CupcakeQuantities[i] 表达式中提取的.

接收控制器方法应该与传递给视图的模型相同:

例如

[HttpPost]公共 ActionResult(PartyBookingModel 模型)

I can't find or figure out how to take a list of items (cupcakes) and display them in razor with a quantity field.

What is happening is I am not able to get the values for each cupcake quantity in the list. Can you do textbox arrays in Razor?

VIEW

<div class="form-group">
    <label>Cupcakes</label>
    @foreach (var cupcake in Model.CupcakeList)
    {
        @Html.TextBox("CupcakeQuantities", cupcake.Id)  @cupcake.Name <br/>
    }
</div>

MODEL

public List<Cupcake> CupcakeList { get; set; }
public List<int> CupcakeQuantities { get; set; }

CONTROLLER

public ActionResult Create()
{
    var model = new PartyBookingModel()
    {
        CupcakeList = db.Cupcakes.ToList(),
        CupcakeQuantities = new List<int>()
    };

    return View(model);
}

CUPCAKE (ENTITY)

public class Cupcake
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal PerDozen { get; set; }
}

解决方案

You have to use an index, rather than foreach for it to work.

@for (int i = 0; i < Model.CupcakeList.Count; i++)
{
    @Html.TextBoxFor(x=>Model.CupcakeQuantities[i]) @Model.CupcakeList[i].Name <br/>
}

This will create sequentially named+number entries that will be recombined back into the model on post back.

I realise this may seem like "why doesn't foreach work?", but with foreach there is not enough reflected information available to TextBoxFor (as it is just a single object), whereas the array index is extracted by reflection from the Model.CupcakeQuantities[i] expression.

The receiving controller method should take the same as the model passed to the view:

e.g.

[HttpPost]
public ActionResult(PartyBookingModel model)

这篇关于用于列表项的 Asp.net 剃刀文本框数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！