匿名变量的属性名能不能用变量表示

Question

匿名变量的属性名能不能用变量表示呢，或者说能不用把字典转化成匿名类呢

比如string a="kkk";

var s=new { "kkk"="ttt"};

在上面的代码中new { "kkk"="ttt"}这个KKK能不能用a来代替呢

或者说Dictionary<string, object>把这个的一个变量转成匿名类的对象呢

Answer 1

就像你已经定义了一个类的属性，属性名当然是固定的，一旦定义恐怕无法再变更了。

除非你使用4.0（net framework）中的动态类（dynamic）属性。代码大致如下：

namespace CSharp
{
    class A : DynamicObject
    {
        private Dictionary<string, object> KeyValues = new Dictionary<string, object>();
 
        //动态获取属性
        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            if (KeyValues.ContainsKey(binder.Name))
            {
                result = KeyValues[binder.Name];
                return true;
            }
            result = null;
            return false;
        }
 
        //动态增加设置属性
        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            if (KeyValues.ContainsKey(binder.Name))
            {
                KeyValues[binder.Name] = value;
            }
            else
            {
                KeyValues.Add(binder.Name, value);
            }
            return true;
        }
 
        //动态改变已有属性
        public void ChangeProperty(string oldname, string newname)
        {
            if (KeyValues.ContainsKey(oldname))
            {
                object obj = KeyValues[oldname];
                KeyValues.Remove(oldname);
                KeyValues.Add(newname, obj);
            }
        }
    }
 
    class Program
    {
        static void Main(string[] args)
        {
            dynamic a = new A();
            a.Property1 = "A";
            Console.WriteLine(a.Property1);
            //更改Property1到Property2
            a.ChangeProperty("Property1", "Property2");
            //打印
            Console.WriteLine(a.Property2);
        }
 
    }
}

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Answer 2

我提供一个思路：

先把Dictionary<string,object>序列化string，然后在把string反序列化匿名对象。

代码如下：

            // 数据源
            IDictionary<string, object> dic = new Dictionary<string, object>();
            dic.Add("a", "aa");
            dic.Add("b", "bb");
            dic.Add("c", "cc");

            // 序列化
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            string serialStr = serializer.Serialize(dic);
            // 反序列化
            object varObj = serializer.DeserializeObject(serialStr);