映射对象字典，反之亦然 [英] Mapping object to dictionary and vice versa

问题描述

有没有优雅快速的方法来映射对象字典，反之亦然？

例：

 的IDictionary＆LT;字符串，对象＆gt; A =新字典＆LT;字符串，对象＆gt;（）;
一[ID] = 1;
一[名称] =艾哈迈德;
// .....
 

变为

  SomeClass的B =新SomeClass的（）;
b.Id = 1;
b.Name =艾哈迈德;
// ..........
 

解决方案

使用一些反思和仿制药的两种方法扩展，你可以做到这一点。

右键，其他人却大都相同的解决方案，但这种使用更少的反射是更多的性能，明智和方式更具有可读性：

 公共静态类ObjectExtensions
{
    公共静态牛逼ToObject＆LT; T＆GT;（这IDictionary的＆LT;字符串，对象＆gt;源）
        其中T：类，新的（）
    {
            牛逼someObject =新T（）;
            键入someObjectType = someObject.GetType（）;

            的foreach（KeyValuePair＆LT;字符串，对象＆gt;中源项）
            {
                someObjectType.GetProperty（item.Key）.SetValue（someObject，item.Value，NULL）;
            }

            返回someObject;
    }

    公共静态的IDictionary＆LT;字符串，对象＆gt; AsDictionary（此对象源，的BindingFlags bindingAttr = BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance）
    {
        返回source.GetType（）。GetProperties中（bindingAttr）.ToDictionary
        （
            propInfo =＆GT; propInfo.Name，
            propInfo =＆GT; propInfo.GetValue（源，空）
        ）;

    }
}

A级
{
    公共字符串为prop1
    {
        得到;
        组;
    }

    公众诠释Prop2
    {
        得到;
        组;
    }
}

类节目
{
    静态无效的主要（字串[] args）
    {
        字典＆LT;字符串，对象＆gt;词典=新词典＆LT;字符串，对象＆gt;（）;
        dictionary.Add（为prop1，世界，你好！）;
        dictionary.Add（Prop2，3893）;
        一个someObject = dictionary.ToObject＆LT; A＆GT;（）;

        IDictionary的＆LT;字符串，对象＆gt; objectBackToDictionary = someObject.AsDictionary（）;
    }
}
 

Are there any elegant quick way to map object to a dictionary and vice versa?

Example:

IDictionary<string,object> a = new Dictionary<string,object>();
a["Id"]=1;
a["Name"]="Ahmad";
// .....

becomes

SomeClass b = new SomeClass();
b.Id=1;
b.Name="Ahmad";
// ..........

解决方案

Using some reflection and generics in two methods extensions you can achieve that.

Right, others did mostly the same solution, but this uses less reflection which is more performance-wise and way more readable:

public static class ObjectExtensions
{
    public static T ToObject<T>(this IDictionary<string, object> source)
        where T : class, new()
    {
            T someObject = new T();
            Type someObjectType = someObject.GetType();

            foreach (KeyValuePair<string, object> item in source)
            {
                someObjectType.GetProperty(item.Key).SetValue(someObject, item.Value, null);
            }

            return someObject;
    }

    public static IDictionary<string, object> AsDictionary(this object source, BindingFlags bindingAttr = BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance)
    {
        return source.GetType().GetProperties(bindingAttr).ToDictionary
        (
            propInfo => propInfo.Name,
            propInfo => propInfo.GetValue(source, null)
        );

    }
}

class A
{
    public string Prop1
    {
        get;
        set;
    }

    public int Prop2
    {
        get;
        set;
    }
}

class Program
{
    static void Main(string[] args)
    {
        Dictionary<string, object> dictionary = new Dictionary<string, object>();
        dictionary.Add("Prop1", "hello world!");
        dictionary.Add("Prop2", 3893);
        A someObject = dictionary.ToObject<A>();

        IDictionary<string, object> objectBackToDictionary = someObject.AsDictionary();
    }
}

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