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

问题描述

我无法找到或弄清楚如何利用项目（纸杯蛋糕）的列表，并在剃刀与数量字段中显示它们。

正在发生的事情是，我没能得到的值列表中的每个蛋糕的数量。你可以做的文本框数组在剃刀？

查看

 ＆LT; D​​IV CLASS =表单组＆GT;
    ＆LT;标签＆gt;＆蛋糕LT; /标签＆gt;
    @foreach（在Model.CupcakeList VAR蛋糕）
    {
        @ Html.TextBox（CupcakeQuantities，cupcake.Id）@ cupcake.Name＆LT; BR /＆GT;
    }
＆LT; / DIV＆GT;
 

MODEL

 公开名单＆LT;＆蛋糕GT; CupcakeList {搞定;组; }
公开名单＆LT; INT＆GT; CupcakeQuantities {搞定;组; }
 

控制器

 公众的ActionResult的Create（）
{
    VAR模型=新PartyBookingModel（）
    {
        CupcakeList = db.Cupcakes.ToList（），
        CupcakeQuantities =新的List＆LT; INT＆GT;（）
    };    返回查看（模型）;
}
 

CUPCAKE（实体）

 公共类蛋糕
{
    公众诠释标识{搞定;组; }
    公共字符串名称{;组; }
    公共小数PerDozen {搞定;组; }
}
 

解决方案

您必须使用一个索引，而不是的foreach 为它工作。

  @for（INT I = 0; I＆LT; Model.CupcakeList.Count;我++）
{
    @ Html.TextBoxFor（X =＆GT; Model.CupcakeQuantities [I]）@ Model.CupcakeList [I] .Name点＆LT; BR /＆GT;
}
 

这将创建顺序命名+将被重组回模型上回发数量的条目。

我意识到这可能看起来是为什么不工作的foreach？，而是用foreach没有到 TextBoxFor 足够的可用反射的信息（因为它仅仅是一个单个对象），而数组的索引是通过从 Model.CupcakeQuantities [I] 前pression反射提取。

接收控制器方法应该一样传递到视图的模型：

例如

  [HttpPost]
公众的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)

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