使用 ValueInjector 映射类的步骤

Question

快速解决以下代码未发生映射的问题。有人可以解释为什么吗？或者我应该怎么做才能进行映射？

var parent = new Parent();
parent.ChildOne.Add(new ChildOne() { Name = "Child One" });
parent.ChildTwo.Add(new ChildTwo() { Name = "Child Two" });
AnotherParent anotherParent = new AnotherParent();

anotherParent.InjectFrom<LoopValueInjection>(parent);

必修课如下

另一个孩子

 public class AnotherChildOne
    {
        public string Name { get; set; }
    }

另一个孩子两个

 public class AnotherChildTwo
    {
        public string Name { get; set; }

    }

另一个家长

public class AnotherParent
    {
        public ICollection<AnotherChildOne> ChildOne { get; set; }

        public ICollection<AnotherChildTwo> ChildTwo { get; set; }

        public AnotherParent()
        {
            ChildOne = new Collection<AnotherChildOne>();
            ChildTwo = new Collection<AnotherChildTwo>();
        }


    }

孩子二

public class ChildTwo
    {
        public string Name { get; set; }

    }

孩子一

 public class ChildOne
    {
        public string Name { get; set; }
    }

家长

 public class Parent
    {

        public ICollection<ChildOne> ChildOne { get; set; }

        public ICollection<ChildTwo> ChildTwo { get; set; }

        public Parent()
        {
            ChildOne = new Collection<ChildOne>();
            ChildTwo = new Collection<ChildTwo>();
        }

    }

Answer 1

我相信默认情况下，Value Injector 只会注入具有相同名称的相同类型的属性。您可以通过调整 Value Injector 文档中的 CloneInjection 示例来解决此问题，如here 所述，使用以下代码：

public class CloneInjection : ConventionInjection
{
    protected override bool Match(ConventionInfo c)
    {
        return c.SourceProp.Name == c.TargetProp.Name && c.SourceProp.Value != null;
    }

    protected override object SetValue(ConventionInfo c)
    {
        //for value types and string just return the value as is
        if (c.SourceProp.Type.IsValueType || c.SourceProp.Type == typeof(string)
            || c.TargetProp.Type.IsValueType || c.TargetProp.Type == typeof(string))
            return c.SourceProp.Value;

        //handle arrays
        if (c.SourceProp.Type.IsArray)
        {
            var arr = c.SourceProp.Value as Array;
            var clone = Activator.CreateInstance(c.TargetProp.Type, arr.Length) as Array;

            for (int index = 0; index < arr.Length; index++)
            {
                var a = arr.GetValue(index);
                if (a.GetType().IsValueType || a.GetType() == typeof(string)) continue;
                clone.SetValue(Activator.CreateInstance(c.TargetProp.Type.GetElementType()).InjectFrom<CloneInjection>(a), index);
            }
            return clone;
        }


        if (c.SourceProp.Type.IsGenericType)
        {
            //handle IEnumerable<> also ICollection<> IList<> List<>
            if (c.SourceProp.Type.GetGenericTypeDefinition().GetInterfaces().Contains(typeof(IEnumerable)))
            {
                var t = c.TargetProp.Type.GetGenericArguments()[0];
                if (t.IsValueType || t == typeof(string)) return c.SourceProp.Value;

                var tlist = typeof(List<>).MakeGenericType(t);
                var list = Activator.CreateInstance(tlist);

                var addMethod = tlist.GetMethod("Add");
                foreach (var o in c.SourceProp.Value as IEnumerable)
                {
                    var e = Activator.CreateInstance(t).InjectFrom<CloneInjection>(o);
                    addMethod.Invoke(list, new[] { e }); // in 4.0 you can use dynamic and just do list.Add(e);
                }
                return list;
            }

            //unhandled generic type, you could also return null or throw
            return c.SourceProp.Value;
        }

        //for simple object types create a new instace and apply the clone injection on it
        return Activator.CreateInstance(c.TargetProp.Type)
            .InjectFrom<CloneInjection>(c.SourceProp.Value);
    }
}

如果您包含上述CloneInjection 代码，您将需要这样做：

anotherParent.InjectFrom<CloneInjection>(parent);

代替：

anotherParent.InjectFrom<LoopValueInjection>(parent);