我想将我从 MSSQL 数据库中获取的数据作为 DTO 对象返回。我在此列表结构中返回的列表返回空。点网

Question

一个项目可以有多个 greenQualityEffects。为此，我把它看成是一种 NoSQL 数据库结构，并把它返回成一个 DTO 对象。

总结;

我想要做的是提取一个项目拥有的所有 GreenQualityEffect 数据并将其返回到这个 DTO 对象中。 （我正在使用 MS SQL，但表之间没有关系。就像认为它们不是 SQL）

这是我的处理程序类：

var list = new List<GreenQualityEffect>();
await _itemBusinessRules.ItemShouldBeListedWhenSelected(request.PageRequest.Page, request.PageRequest.PageSize);

IPaginate<Item> activeList = await _itemService.GetActiveGreenQualityItemList(request.PageRequest.Page, request.PageRequest.PageSize);

GreenQualityItemListModel mappedGreenQualityItemListModel = _mapper.Map<GreenQualityItemListModel>(activeList);

            
foreach (var item in mappedGreenQualityItemListModel.Items)
    {
        var greenItem = await _itemService.GetById(item.Id);
        var greenQuality = await _greenQualityService.GetById(greenItem.GreenQualityId);
        IPaginate<GreenQualityEffect> greenQualityEffectList = await  _greenQualityEffectService.GetListByGreenQualityId(greenQuality.Id);

        item.GreenQualityName = greenQuality.Name;
        item.GreenQualityDescription= greenQuality.Description;
                
        foreach (var item2 in greenQualityEffectList.Items)
        {

            foreach (var item3 in item.EffectItems)
            { 
                item3.EffectName = item2.EffectName;
                item3.EffectDescription= item2.EffectDescription;
            }
        }
    }  
return mappedGreenQualityItemListModel;  

这是我的 DTO :

public class GreenQualityItemListModel
{
    public IList<GreenQualityItemDto> Items { get; set; }
}

这是 GreenQualityItemDto :

public class GreenQualityItemDto
{
    //Item
    public int Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
    public double Cost { get; set; }
    public double SellPrice { get; set; }
    public string Tag { get; set; }
    public QualityType QualityType { get; set; }
    public ItemCategory ItemCategory { get; set; }
    public ItemType ItemType { get; set; }
    public ItemHeroType ItemHeroType { get; set; }
    public int GreenQualityId { get; set; }
    public bool? IsStackable { get; set; }
    public bool? IsConsumable { get; set; }
    public bool? IsGlpyh { get; set; }

    //ItemGreenQuality
    public string GreenQualityName { get; set; }
    public string GreenQualityDescription { get; set; }


    public ICollection<GreenQualityItemEffectDto> EffectItems { get; set; }


    public GreenQualityItemDto()
    {
        EffectItems = new HashSet<GreenQualityItemEffectDto>();
    } 
}

这是我要返回的DTO模型：

{
      "id": 1,
      "name": "New Item New",
      "description": "Item Desc New One",     
      "greenQualityId": 2,   
      "greenQualityName": "Test",
      "greenQualityDescription": "Test",
      "effectItems": []
}

我尝试将列表与许多 linq 查询和 Foreach 构造同步，但它没有用。