Question

我正在使用AutoMapper将对象映射到彼此。我的一个对象有几个属性，它们是其他对象的集合。我试图想出一种通用的方法来映射各种对象，直到运行时才知道它们是什么。这是我到目前为止的示例代码：

public class Person
{
    public List<Sibling> Siblings;
    public List<Pet> Pets;
    public List<Vehicle> Vehicles;
}

static void DoStuff(List<PersonInfo> people)
{
    Dictionary<Type, Type> dictionary = new Dictionary<Type, Type>();
    {
        dictionary.Add(typeof(SiblingInfo), typeof(Sibling));
        dictionary.Add(typeof(PetInfo), typeof(Pet));
        dictionary.Add(typeof(VehicleInfo), typeof(Vehicle));
        //MANY MORE ENTRIES
        //.................
        //END
    }

    using (MyEntities db = new MyEntities())
    {
        foreach (PersonInfo personInfo in people)
        {
            Person newPerson = Mapper.Map<Person>(personInfo);

            foreach (PropertyInfo propertyInfo in personInfo.GetType().GetProperties())
            {
                if (propertyInfo.PropertyType.IsArray)
                {
                    Array array = (Array)propertyInfo.GetValue(personInfo);

                    for (int i = 0; i < array.Length; i++)
                    {
                        dynamic objectInfo = array.GetValue(i);

                        Type sourceType = objectInfo.GetType();

                        Type destinationType;

                        if (dictionary.TryGetValue(sourceType, out destinationType)) ;

                        dynamic newObject = Mapper.Map(objectInfo, sourceType, destinationType);

                        //HOW TO ADD THE NEW OBJECT TO ITS RESPECTIVE COLLECTION???
                        //newPerson.Siblings.Add(newObject);
                        //newPerson.Pets.Add(newObject);
                        //newPerson.Vehicles.Add(newObject);
                        //newPerson.HOW_TO_ADD_THIS.Add(newObject);
                    }
                }
            }
        }
        //DO MORE STUFF
        //........
        //END
    }
}

无论类型如何，这都可以很好地进行映射。我正在努力解决的问题是在这段代码的底部，我需要将新对象添加到父对象的适当集合属性中。

如何修改此代码以将新对象添加到相应的集合中？

Answer 1

如果我理解正确，您可以通过反射获取集合属性，然后在那里添加新值 - 如下所示：

class Program {
    static void Main(string[] args) {            
        var person = new Person();
        var prop = person.GetType().GetProperty("Siblings");
        var currentValue = (IList) prop.GetValue(person);
        currentValue.Add("new object");
        Console.WriteLine(person.Siblings);
    }
}

public class Person {
    public Person() {
        Siblings = new ObservableCollection<string>();
    }
    public ObservableCollection<string> Siblings { get; private set; } 
}

如果collection属性可以为null - 请确保在添加值之前对其进行初始化。

将动态对象添加到父对象的集合属性

1 个答案: