在c#中将List对象赋值给另一个List对象

本文关键字：对象 List 另一个 赋值 中将 | 更新日期: 2023-09-27 18:18:21

我有以下类:

public class ProviderQualification
{
    public List<ProviderDetail> ProviderDetails { get; set; }
}
public class ProviderDetail
{
    public string ProviderName { get; set; }
    public string ServiceableOffers { get; set; }
}
public class ProviderQualificationTimeViewModel
{
    public List<ProviderQualificationDetail> ProviderQualificationDetails { get; set; }
}
public class ProviderQualificationDetail
{
    public string ProviderName { get; set; }
    public string TotalServiceableOffers { get; set; }
}

我用List<ProviderDetail>填充ProviderQualification对象。

ProviderQualification providerQualification = reporting.GetProviderQualification();

现在我想把这个列表复制到我的List<ProviderQualificationDetail>。我该怎么做呢?

在c#中将List对象赋值给另一个List对象

Using Linq:

List<ProviderQualificationDetail> result = 
         providerQualification.ProviderDetails.Select(
                         q => new ProviderQualificationDetail() 
                                   { 
                                       ProviderName  = q.ProviderName, 
                                       TotalServiceableOffers = q.ServiceableOffers 
                                   }).ToList();

使用Select，您将ProviderDetails中的每个元素投影到ProviderQualificationDetail类型的新元素中，然后将其枚举到List中。

需要一个从ProviderDetail到ProviderQualificationDetail的映射。例如，如果你只是想复制这些值，你可以像这样内联地写:

ProviderQualification providerQualification = reporting.GetProviderQualification();
var items = providerQualification.ProviderDetails
            .Select(detail => new ProviderQualificationDetail
                {
                    ProviderName = detail.ProviderName,
                    TotalServiceableOffers = detail.ServiceableOffers
                })
            .ToList();
var viewModel = new ProviderQualificationTimeViewModel
{
    ProviderQualificationDetails = items
};

可以使用

Enumerable.Select<TSource,> Method (IEnumerable， Func<TSource,>)

例如

List<ProviderQualificationDetail> list = 
providerQualification.ProviderDetails
.Select(x => new ProviderQualificationDetail(){
    ProviderName = x.ProviderName,
    TotalServiceableOffers = x.ServiceableOffers
}).ToList();

在我看来，@zaria想要选择不同的ProviderName和总ServiceableOffers。如果她有ProviderQualification类，为什么她想绑定到ProviderQualificationDetail ?

 List<ProviderQualificationDetail> list=providerQualification.ProviderDetails.GroupBy(x => x.ProviderName)
                                          .Select(x=>new ProviderQualificationDetail{
                                                   ProviderName =x.Key,
                                                   TotalServiceableOffers=Sum(y=>y.ServiceableOffers) 
                                           }).ToList();
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