C# 如何在automapper中为具有复杂关系的类进行映射
到目前为止,我只有如下所示的C# 如何在automapper中为具有复杂关系的类进行映射,c#,asp.net-mvc,automapper,C#,Asp.net Mvc,Automapper,到目前为止,我只有如下所示的ItemName和ItemPrice: public class Item { public string Name { get; set; } public virtual ICollection<Stock> Stocks { get; set; } public virtual ICollection<Price> Prices { get; set; } -- remove some code for brevity
ItemName
和ItemPrice
:
public class Item
{
public string Name { get; set; }
public virtual ICollection<Stock> Stocks { get; set; }
public virtual ICollection<Price> Prices { get; set; }
-- remove some code for brevity --
}
public Stock
{
public int Id { get; set; }
public int ItemId { get; set; }
public int StorageId { get; set; }
public float Amount { get; set; }
public virtual Item Item { get; set; }
public virtual Storage Storage { get; set; }
-- remove some code for brevity --
}
public class Storage
{
public string Name { get; set; }
public virtual ICollection<Stock> Stocks { get; set; }
-- remove some code for brevity --
}
public class SPrice
{
public decimal Price { get; set; }
public int decimal ItemId { get; set; }
public virtual Item Item { get; set; }
-- remove some code for brevity --
}
Name : Snack bar
Price : $1.00
Stocks :
Storages | How many
Storage1 | 23
Storage2 | 24
Storage3 | 10
Mapper.CreateMap<Item, ItemDTO>()
.ForMember(dto => dto.Price, opt =>
opt.MapFrom(s => s.Prices.Any() ? s.Price.OrderByDescending(i => i.Id).FirstOrDefault() : 0m));
Mapper.CreateMap()
.ForMember(dto=>dto.Price,opt=>
opt.MapFrom(s=>s.Prices.Any()?s.Price.OrderByDescending(i=>i.Id.FirstOrDefault():0m));
然后按如下方式存储它们:
public class Item
{
public string Name { get; set; }
public virtual ICollection<Stock> Stocks { get; set; }
public virtual ICollection<Price> Prices { get; set; }
-- remove some code for brevity --
}
public Stock
{
public int Id { get; set; }
public int ItemId { get; set; }
public int StorageId { get; set; }
public float Amount { get; set; }
public virtual Item Item { get; set; }
public virtual Storage Storage { get; set; }
-- remove some code for brevity --
}
public class Storage
{
public string Name { get; set; }
public virtual ICollection<Stock> Stocks { get; set; }
-- remove some code for brevity --
}
public class SPrice
{
public decimal Price { get; set; }
public int decimal ItemId { get; set; }
public virtual Item Item { get; set; }
-- remove some code for brevity --
}
Name : Snack bar
Price : $1.00
Stocks :
Storages | How many
Storage1 | 23
Storage2 | 24
Storage3 | 10
Mapper.CreateMap<Item, ItemDTO>()
.ForMember(dto => dto.Price, opt =>
opt.MapFrom(s => s.Prices.Any() ? s.Price.OrderByDescending(i => i.Id).FirstOrDefault() : 0m));
var items=\u itemService.All.Project().To();
简而言之,如何为属性成员的其余部分进行映射?有什么建议吗?演示代码会很好。非常感谢 这里有一个例子可以添加到我的评论中 假设你有这些课程 模型 您只需按如下方式配置Automapper:
public class ItemViewModel
{
public string Name { get; set; }
public StockViewModel [] Stocks { get; set; }
public PriceViewModel [] Prices { get; set; }
}
AutoMapper.CreateMap();
AutoMapper.CreateMap();
AutoMapper.CreateMap();
然后,自动映射器将自动确定子组件列表的映射。只是一个旁注:当输入和输出类的属性名称匹配时,您不必指定任何内容,只需指定类映射(根和叶)。因此,您可以映射价目表,让客户决定显示哪一个。这将减少映射逻辑,我总是觉得这更令人欣慰。谢谢我很想看到一些示例代码,因为我在演示中学到了很多:)这是否意味着您不需要为
StockViewModel
和PriceViewModel
创建类?您仍然需要创建这些类。但您不必向自动映射器明确解释对象结构。自动映射器知道每个复合元素类的映射就足够了。基本列表和集合映射是隐式完成的。这些配置的顺序重要吗?我不这么认为,但必须有其他人来确认。