Automapper未能地图上的IEnumerable [英] Automapper failing to map on IEnumerable

问题描述

我有两个类，像这样：

 公共类SentEmailAttachment：ISentEmailAttachment 
 {
公共SentEmailAttachment （）; 
 
公共字符串文件名{获得;组; } 
公共字符串ID {搞定;组; } 
公共字符串SentEmailID {搞定;组; } 
公共字符串StorageService {搞定;组; } 
公共字符串StorageServiceFileID {搞定;组; } 
} 
  

和

 公共类SentEmailAttachmentItem：ISentEmailAttachment 
 {
 [ITEMNAME] 
公共字符串ID {搞定;组; } 
公共字符串SentEmailID {搞定;组; } 
公共字符串文件名{获得;组; } 
公共字符串StorageService {搞定;组; } 
公共字符串StorageServiceFileID {搞定;组; } 
} 
  

相同，你可以看到（它们都实现接口，以确保本）

然后我有以下映射：

  Mapper.CreateMap< IEnumerable的< SentEmailAttachmentItem>中的IEnumerable< SentEmailAttachment>>（）; 
 Mapper.CreateMap<&IEnumerable的LT; SentEmailAttachment>中的IEnumerable< SentEmailAttachmentItem>>（）; 
  

然后我有以下的单元测试：

  //创建发送电子邮件附件
变种listOfSentEmailAttachments =新名单℃的负荷; SentEmailAttachment>（）; 
 
的for（int i = 0;我小于10;我++）
 listOfSentEmailAttachments.Add（新SentEmailAttachment {文件名=testFileName，ID = Guid.NewGuid（）的ToString（） ，SentEmailID = Guid.NewGuid（）的ToString（），StorageService =S3，StorageServiceFileID =SomeFileID}）; 
 
 VAR sentEmailAttachmentItems = Mapper.DynamicMap<&IEnumerable的LT; SentEmailAttachment>中的IEnumerable< SentEmailAttachmentItem>>（listOfSentEmailAttachments）; 
 
 VAR itemToTest = sentEmailAttachmentItems.First（）; 
 
 Assert.IsInstanceOfType（itemToTest的typeof（SentEmailAttachmentItem））; 
  

这失败 -
了IEnumerable sentEmailAttachmentItems是空的。
它没有映射SentEmailAttachments吧...

任何想法是怎么回事？

$ B名单$ b

我有它的工作单的对象（映射每到每个之一中的一个），但不是一个集...

解决方案

您无需显式地映射集合类型，只有项目类型。只要做到：

  Mapper.CreateMap< SentEmailAttachment，SentEmailAttachmentItem>（）; 
 VAR附件= Mapper.Map<&IEnumerable的LT; SentEmailAttachment>中列出< SentEmailAttachmentItem>>（someList）; 
  

这会工作得很好。

I have two classes like so:

public class SentEmailAttachment : ISentEmailAttachment
{
    public SentEmailAttachment();

    public string FileName { get; set; }
    public string ID { get; set; }
    public string SentEmailID { get; set; }
    public string StorageService { get; set; }
    public string StorageServiceFileID { get; set; }
}

And

public class SentEmailAttachmentItem : ISentEmailAttachment
{
    [ItemName]
    public string ID { get; set; }
    public string SentEmailID { get; set; }
    public string FileName { get; set; }
    public string StorageService { get; set; }
    public string StorageServiceFileID { get; set; }
}

Identical, as you can see (they both implement interface to ensure this)

I then have the following mapping:

Mapper.CreateMap<IEnumerable<SentEmailAttachmentItem>, IEnumerable<SentEmailAttachment>>();
Mapper.CreateMap<IEnumerable<SentEmailAttachment>, IEnumerable<SentEmailAttachmentItem>>();

I then have the following Unit test:

//create a load of sent email attachments
var listOfSentEmailAttachments = new List<SentEmailAttachment>();

for (int i = 0; i < 10; i++)
    listOfSentEmailAttachments.Add(new SentEmailAttachment { FileName = "testFileName", ID = Guid.NewGuid().ToString(), SentEmailID = Guid.NewGuid().ToString(), StorageService = "S3", StorageServiceFileID = "SomeFileID" });

var sentEmailAttachmentItems = Mapper.DynamicMap<IEnumerable<SentEmailAttachment>, IEnumerable<SentEmailAttachmentItem>>(listOfSentEmailAttachments);

var itemToTest = sentEmailAttachmentItems.First();

Assert.IsInstanceOfType(itemToTest, typeof(SentEmailAttachmentItem));

This fails - The IEnumerable sentEmailAttachmentItems is empty. It didn't map the list of SentEmailAttachments to it...

Any idea what's going on??

I have it working on single objects (mapping one of each to one of each) but not a collection...

解决方案

You do not need to explicitly map collection types, only the item types. Just do:

Mapper.CreateMap<SentEmailAttachment, SentEmailAttachmentItem>();
var attachments = Mapper.Map<IEnumerable<SentEmailAttachment>, List<SentEmailAttachmentItem>>(someList);

That will work just fine.

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