如何将SearchCompanyResponse中的列表映射为Company类型列表companies

手动遍历（直观可控，适合简单场景） #

直接循环结果集，逐个创建Company对象并添加到目标列表：

var searchCompany = new SearchCompanyRequest();
searchCompany.Query = request.Name;
searchCompany.DatlinqKey = "TestKey";
var searchCompanyResponse = GetApi<SearchCompanyRequest,SearchCompanyResponse>(DatlinqApiMethod.SearchCompany, searchCompany);        
var companies = new List<Company>();

if (searchCompanyResponse?.Result != null)
{
    foreach (var item in searchCompanyResponse.Result)
    {
        companies.Add(new Company
        {
            Id = item.Id,
            Name = item.Name
        });
    }
}

LINQ投影（代码简洁，适合字段匹配场景） #

利用LINQ的Select方法快速转换集合，一行代码完成映射：

var searchCompany = new SearchCompanyRequest();
searchCompany.Query = request.Name;
searchCompany.DatlinqKey = "TestKey";
var searchCompanyResponse = GetApi<SearchCompanyRequest,SearchCompanyResponse>(DatlinqApiMethod.SearchCompany, searchCompany);        

var companies = searchCompanyResponse?.Result?
    .Select(item => new Company { Id = item.Id, Name = item.Name })
    .ToList() ?? new List<Company>();

AutoMapper（适合多场景复用，减少重复代码） #

如果项目已引入AutoMapper，先配置映射规则，再快速转换：

1. 全局配置映射规则（如在Startup/Program.cs中初始化）：

var mapperConfig = new MapperConfiguration(cfg =>
{
    cfg.CreateMap<SearchCompanyResponseCompany, Company>();
});
var mapper = mapperConfig.CreateMapper();

2. 业务代码中执行映射：

var searchCompany = new SearchCompanyRequest();
searchCompany.Query = request.Name;
searchCompany.DatlinqKey = "TestKey";
var searchCompanyResponse = GetApi<SearchCompanyRequest,SearchCompanyResponse>(DatlinqApiMethod.SearchCompany, searchCompany);        

var companies = mapper.Map<List<Company>>(searchCompanyResponse?.Result);

注意事项 #

• 必须做空值判断：searchCompanyResponse或Result可能为null，直接访问会触发空引用异常，上述示例均包含空值处理逻辑。
• 当SearchCompanyResponseCompany与Company字段结构完全一致时，前两种方式足够高效；若映射规则复杂或需多处复用，AutoMapper是更优选择。

内容的提问来源于stack exchange，提问作者Robin Groot