添加項目到新的集合，而不是替換整個集合

Question

我正在使用Automapper，我想知道是否有可能將源集合中的所有項目添加到目標。

考慮以下幾點：

public class A { public IDictionary<int, string> myDictionary = new Dictionary<int, string>(); } 

public class B { public IDictionary<int, string> myDictionary = new Dictionary<int, string>(); } 

然後創建的映射：

Mapper.CreateMap<A, B>(); 

，做實際映射：

Mapper.Map<A, B>(instanceOfA); 

我相信屏幕後面會出現這種情況：

newInstanceOfB.myDictionary = instanceOfA.myDictionary 

但是，它可以告訴Automapper做到這一點（也許有東西自定義轉換器...）：

foreach (var item in instanceOfA.myDictionary) 
    newInstanceOfB.myDictionary[item.Key] = item.Value 

Answer 1

這似乎爲我工作

Mapper.CreateMap<A, B>() 
    .ForMember(d => d.myDictionary, opt => opt.ResolveUsing(
       s => s.myDictionary.ToDictionary(pair => pair.Key, pair => pair.Value))); 

這裏是意見後完成樣品

public class A { public IDictionary<int, string> myDictionary = new Dictionary<int, string>(); } 
public class B { public IDictionary<int, string> myDictionary = new Dictionary<int, string>(); } 

class Program 
{ 
    static void Main(string[] args) 
    { 
     var instanceOfA = new A 
           { 
            myDictionary = new Dictionary<int, string> 
                { 
                 {1, "a"}, 
                 {2, "b"} 
                } 
           }; 
     Mapper.CreateMap<A, B>() 
      .ForMember(d => d.myDictionary, opt => opt.ResolveUsing(
       s => s.myDictionary.ToDictionary(pair => pair.Key, pair => pair.Value))); 
     var instanceOfB = Mapper.Map<A, B>(instanceOfA); 
     instanceOfA.myDictionary[1] = "c"; 

     if (instanceOfB.myDictionary[1] == "c") 
      Console.WriteLine("Failed"); 
     else 
      Console.WriteLine("Succeeded"); 
     Console.ReadLine(); 
    } 
} 

編輯： * 再次編輯*

Mapper.CreateMap<A, B>() 
    .ForMember(d => d.myDictionary, opt => opt.Ignore()) 
    .AfterMap((s, d) => 
         { 
         d.myDictionary.Clear(); 
         s.myDictionary.ToList().ForEach(p => d.myDictionary.Add(p)); 
        });