Question

我正在尝试包含第二个foreach循环来从对象中的列表中提取值，但是我在尝试执行此操作时遇到了问题。

这是代码

private List<Opportunity> CreateOpportunities(Basket basket)
    {
        var opps = new List<Opportunity>();

        foreach (var orderLine in basket.OrderLines)
        {
            opps.Add(new Opportunity()
            **{**
                DelegateList = new Delegates
                {
                    foreach (var delegates in orderLine.DelegatesList)
                    {
                        FirstName = delegates.FirstName,
                        LastName = delegates.LastName,
                        Email = delegates.Email
                    }
                },

                CourseId = new CourseBooking
                {
                    Id = orderLine.CourseId
                },
                Quantity = orderLine.Quantity,
                EventId = new EventBooking
                {
                    Id = orderLine.EventId
                },
                EventItemDecimalPrice = orderLine.Price,

                TaxType = new TaxType
                {
                    Id = 1,
                    Name = "UK VAT",
                    Rate = orderLine.VatRate
                },
                RegionCode = orderLine.RegionId
            });
        }

        return opps;
    }

我需要实现的是foreach在每个orderLine中循环然后在该orderLine中有一个列表类和一个foreach循环遍历这个，拉出值并声明FirstName，LastName和Email

目前它不会让我创造foreach并获得警告说它期望一个;或者在foreach之前。任何帮助都会很棒。

编辑：委托构造函数：

public class Delegates
{
    [JsonProperty("first_name")]
    public string FirstName { get; set; }
    [JsonProperty("last_name")]
    public string LastName { get; set; }
    [JsonProperty("email")]
    public string Email { get; set; }
}

编辑：机会（DelegateList类）

public class Opportunity
{
    [JsonProperty("event")]
    public EventBooking EventId { get; set; }
    [JsonProperty("course")]
    public CourseBooking CourseId { get; set; }
    public int Quantity { get; set; }
    /// <summary>
    /// This is the price per person, NOT the total of the opportunity
    /// </summary>
    [JsonProperty("price")]
    public decimal EventItemDecimalPrice { get; set; }

    [JsonProperty("tax_type")]
    public TaxType TaxType { get; set; }

    [JsonIgnore]
    public string RegionCode { get; set; }

    [JsonProperty("delegates")]
    public List<Delegates> DelegateList { get; set; }

}

Answer 1

我认为问题是你在对象初始化中放置一个for-each循环。在初始化for-each之前，您应该移动内部DelegateList循环。像 -

这样的东西

foreach (var orderLine in basket.OrderLines)
{
    var firstName;
    var lastName;
    var email;

    List<DelegateList> delegates = new List<DelegateList>();

    foreach (var delegates in orderLine.DelegatesList)
    {
        delegates.Add(new Delegates{firstName = delegates.FirstName,lastName = delegates.LastName,email = delegates.Email});
    }

    opps.Add(new Opportunity()
    {//...

然后使用内部循环中填充的List初始化DelegateList -

DelegateList = delegates;

Answer 2

使用Linq的选择：

opps.Add(new Opportunity()
{
    DelegateList = orderLine.DelegatesList
       .Select(orderLineDelegate => new Delegates
       {            
            FirstName = orderLineDelegate.FirstName,
            LastName = orderLineDelegate.LastName,
            Email = orderLineDelegate.Email
       })
       .ToList(),

    CourseId = ...

C＃中的ForEach循环问题

2 个答案: