ModelBinding与Steve Sandersons的BeginCollectionItem

Question

我正在使用Steve Sandersons BeginCollectionItem扩展来帮助绑定项目列表.这适用于原始类型.我遇到的问题是,对于我编写的自定义模型绑定器,我无法看到如何生成我绑定的项目的全名和索引.

目前我的模型绑定器如下所示:

public class MoneyModelBinder : DefaultModelBinder 
{
    protected override void OnModelUpdated(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        var valueResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".Amount");

        if (valueResult != null)
        {
            var value = valueResult.AttemptedValue;
            var currencyCode = bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".Iso3LetterCode").AttemptedValue;

            var money = (Money) bindingContext.Model;

            Money parsedValue;
            if (String.IsNullOrEmpty(value))
            {
                money.Amount = null;
                return;
            }

            var currency = Currency.FromIso3LetterCode(currencyCode);

            if (!Money.TryParse(value, currency, out parsedValue))
            {
                bindingContext.ModelState.AddModelError("Amount", string.Format("Unable to parse {0} as money", value));
            }
            else
            {
                money.Amount = parsedValue.Amount;
                money.Currency = parsedValue.Currency;
            }
        }
        else
        {
            base.OnModelUpdated(controllerContext, bindingContext);
        }
    }
}

我的ViewModel Lokks就像这样(为清晰起见省略了一些属性):

public class EditFeeEarningCapacityViewModel
{

    public List<FeeEarner> FeeEarners { get; set; }

    public class FeeEarner
    {
        public Money AverageChargeOutRate { get; set; }
    }
}

我的Money类型的编辑模板如下所示:

@model Core.Money
@{
    int decimalPlaces;
    if(!int.TryParse(string.Format("{0}", ViewData["DecimalPlaces"]), out decimalPlaces))
    {
        decimalPlaces = 0;
    }
}
<div class="input-prepend">
    <span class="add-on">@Model.Currency.Symbol</span>@Html.TextBoxFor(m => m.Amount,
                                                                new
                                                                {
                                                                    placeholder = string.Format("{0}", Model.Currency),
                                                                    @class = "input-mini",
                                                                    Value = String.Format("{0:n" + decimalPlaces + "}", Model.Amount)
                                                                })
</div>
@Html.HiddenFor(x => x.Iso3LetterCode)

对于具有如下发布值的表单:

FeeEarners.index    3fa91d09-0617-4bea-ae3f-d84862be8c04

FeeEarners[3fa91d09-0617-4bea-ae3f-d84862be8c04].feeEarner.AverageChargeOutRate.Amount  500
FeeEarners[3fa91d09-0617-4bea-ae3f-d84862be8c04].feeEarner.AverageChargeOutRate.Iso3LetterCode  GBP

我看不到如何检测项目的索引或我绑定的属性名称.基本上,我如何找到我想要绑定的项的索引以及我试图绑定数据的属性的名称？

Answer 1

我不熟悉那个助手，但为了收集，我做了一些不同的技巧。

定义键

var key = "EditModel[{0}].{1}";

变量索引 = 0；

然后构建表单

foreach(var fee in Model.FeeEarners){
   @Html.TextBox(string.Format(key, index, "PropertyNameFromYourFeeClass"));
//It will build text box and set value
}

在控制器端创建带有输入参数的操作

public ActionResult Save(EditFeeEarningCapacityViewModel editModel){
...your code here
}