c# - 使类 IEnumerable

Question

我有以下类(class)

namespace TaxiResults.Model
{

public class SearchResult
{
    public string status { get; set; }
    public SearchResultResult result { get; set; }
}

public class SearchResultResult
{
    public SearchResultOffer offer { get; set; }
}

public class SearchResultOffer
{
    public SearchResultOffer1[] offers { get; set; }
}

public class SearchResultOffer1
{
    public SearchResultAddress[] addresses { get; set; }
    public string chnl { get; set; }
    public string companyInfoId { get; set; }
    public string companyName { get; set; }
    public string bookingId { get; set; }
    public string tz { get; set; }
    public string pickupDateTime { get; set; }
    public string pickupDateTimeUTC { get; set; }
    public int routeDuration { get; set; }
    public int routeDistance { get; set; }
    public SearchResultPricedetail priceDetail { get; set; }
    public float tax { get; set; }
    public string services { get; set; }
    public int bagCount { get; set; }
    public int passengerCount { get; set; }
    public int productType { get; set; }
    public string resultset { get; set; }
    public string companyInfoId3cd { get; set; }
}

public class SearchResultPricedetail
{
    public SearchResultOriginalprice originalPrice { get; set; }
    public SearchResultFinalprice finalPrice { get; set; }
}

public class SearchResultOriginalprice
{
    public SearchResultAmount[] amounts { get; set; }
}

public class SearchResultAmount
{
    public string currency { get; set; }
    public string priceExcludingTax { get; set; }
    public float priceExcludingTaxNumber { get; set; }
    public string priceTotal { get; set; }
    public float priceTotalNumber { get; set; }
    public float exchangeRate { get; set; }
    public string priceTax { get; set; }
    public float priceTaxNumber { get; set; }
}

public class SearchResultFinalprice
{
    public SearchResultAmount1[] amounts { get; set; }
}

public class SearchResultAmount1
{
    public string currency { get; set; }
    public string priceExcludingTax { get; set; }
    public float priceExcludingTaxNumber { get; set; }
    public double priceTotal { get; set; }
    public float priceTotalNumber { get; set; }
    public float exchangeRate { get; set; }
    public string priceTax { get; set; }
    public float priceTaxNumber { get; set; }
}

public class SearchResultAddress
{
    public SearchResultLocation location { get; set; }
    public string address { get; set; }
    public int type { get; set; }
}

public class SearchResultLocation
{
    public float lat { get; set; }
    public float lng { get; set; }
}

}

我想在 Taxi.Model.SearchResult 上执行一个 foreach 循环，以将其输入到我在 MVC View 中返回的模型中。

但是我得到了错误:

foreach statement cannot operate on variables of type 'Taxi.Model.SearchResult' because 'Taxi.Model.SearchResult' does not contain a public definition for 'GetEnumerator'

我是 c#.net 的新手，谁能告诉我需要做什么才能让我执行 foreach？

谢谢

Answer 1

最简单的方法就是枚举 offers 属性，如下所示:

SearchResultOffer searchResults = ...
foreach(var result in searchResults.offers)
{
    ...
}

但要能够枚举 SearchResultOffer 本身，您必须实现 IEnumerable 接口(interface):

public class SearchResultOffer : IEnumerable<SearchResultOffer1>
{
    public SearchResultOffer1[] offers { get; set; }

    // Generic version for IEnumerable<T>
    public IEnumerator<SearchResultOffer1> GetEnumerator() 
    {
        return offers.Cast<SearchResultOffer1>().GetEnumerator();
    }

    // Non-generic version for IEnumerable
    IEnumerator IEnumerable.GetEnumerator()
    {
        return this.GetEnumerator(); // calls the generic version
    }
}

然后你可以这样做:

SearchResultOffer searchResults = ...
foreach(var result in searchResults)
{
    ...
}