使用automapper在动态列表和类列表之间进行字段到字段的映射 [英] Field to field mapping between list of dynamic and list of class with automapper

问题描述

我有一个bellow函数，它返回一个动态对象列表

  public 列表< dynamic> getlist（）
 {
 List< dynamic> d =  new 列表< dynamic>（）; 
 
 d.Add（ new  {Name =   A，Age =  12 }）; 
 d.Add（ new  {Name =   B，年龄=  10 }）; 
 d.Add（ new  {Name =   C，年龄=  15 }）; 
 d.Add（ new  {Name =   D，年龄=  18 }）; 
 d.Add（ new  {Name =   E，年龄=  17 }）; 
 
  return  d; 
 
} 

并且还有一个班级

  public   class  testclass 
 {
  public   string  letter { get ;  set ; } 
  public   Int64 频率{ get ;  set ; } 
} 

我使用AutoMapper.5.2.0。我想将动态列表映射到**列表testclass ** class。

有人能举例说明怎么做？



我试过的：



................................. .............................

解决方案

假设你想要一个从一种类型到另一种类型的直接映射，这样的事情应该有效：

 static void CreateDynamicTestClassMap（IMapperConfigurationExpression配置）
 {
 var dynamicObject = new { Name = default（string），Age = default（int）}; 
 var map = configuration.CreateMap（dynamicObject.GetType（），typeof（testclass））; 
 map.ForMember（nameof（testclass.letter），o => o.MapFrom（nameof（dynamicObject.Name）））; 
 map.ForMember（nameof（testclass.frequency），o => o.MapFrom（nameof（dynamicObject.Age）））; 
} 
 
 ... 
 
 var config = new MapperConfiguration（CreateDynamicTestClassMap）; 
 config.AssertConfigurationIsValid（）; 
 
 var mapper = config.CreateMapper（）; 
 var listOfTestClass = GetList（）。选择（mapper.Map< testclass>）。ToList（）; 

注意： CreateDynamicTestClassMap 方法需要与 GetList 方法在同一个程序集中，否则两个动态类型将不匹配。

I have bellow function which returns a list of dynamic object

public List<dynamic> getlist()
            {
                List<dynamic> d = new List<dynamic>();
    
                d.Add(new { Name = "A", Age = 12 });
                d.Add(new { Name = "B", Age = 10 });
                d.Add(new { Name = "C", Age = 15 });
                d.Add(new { Name = "D", Age = 18 });
                d.Add(new { Name = "E", Age = 17 });
    
                return d;
    
            }

and also have a class

public class testclass
        {
            public string letter { get; set; }
            public Int64 frequency { get; set; }
        }

I use AutoMapper.5.2.0 .I want to map the dynamic list with the list of **testclass** class .
can anybody give an example how to do this?

What I have tried:

..............................................................

解决方案

Assuming you want a direct mapping from one type to the other, something like this should work:

static void CreateDynamicTestClassMap(IMapperConfigurationExpression configuration)
{
    var dynamicObject = new { Name = default(string), Age = default(int) };
    var map = configuration.CreateMap(dynamicObject.GetType(), typeof(testclass));
    map.ForMember(nameof(testclass.letter), o => o.MapFrom(nameof(dynamicObject.Name)));
    map.ForMember(nameof(testclass.frequency), o => o.MapFrom(nameof(dynamicObject.Age)));
}

...

var config = new MapperConfiguration(CreateDynamicTestClassMap);
config.AssertConfigurationIsValid();

var mapper = config.CreateMapper();
var listOfTestClass = GetList().Select(mapper.Map<testclass>).ToList();

NB: The CreateDynamicTestClassMap method will need to be in the same assembly as your GetList method, otherwise the two dynamic types will not match.

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