从未知的类型字典获取密钥和值列表，而不使用动态 [英] get key and value list from unknown typed dictionary without using dynamic

问题描述

我正在尝试将一个字典转换为键值对，因此我可以对它进行一些特殊的解析并将其存储为字符串格式。我使用Unity，所以我不能使用动态关键字。这是我的设置

I am trying to convert a dictionary into key value pairs so I can do some special parsing on it and store it in string format. I am using Unity so I cannot use the dynamic keyword. Here is my setup

我有一些类，我正在遍历其属性并操纵它们的值并将它们放在一个新的字典中。问题是我不知道如何从一个字典获取键和值，我不知道这些类型，而不使用动态技巧。有什么想法吗？我将需要做同样的列表。

I have some class which I am iterating across its properties and manipulating their value and putting them in a new dictionary. The problem is I don't know how to get the keys and values out of a dictionary for which I do not know the types without using the dynamic trick. Any thoughts? I will need to do the same with lists.

    Type t = GetType();
    Dictionary<string, object> output = new Dictionary<string, object>();
    foreach(PropertyInfo info in t.GetProperties())
    {
        object o = info.GetValue(this, null);
        if(info.PropertyType.GetGenericTypeDefinition() == typeof(Dictionary<,>))
        {
            Dictionary<string, object> d = new Dictionary<string, object>();
            foreach(object key in o) //not valid
            {
                object val = DoSomething(o[key]);//not valid
                output[key] = val;
            }
        }
        else if(info.PropertyType.GetGenericTypeDefinition() == typeof(List<>))
        {

        }
    }
    return output;

推荐答案

Dictionary< TKey，TValue& ; 还实现非通用的 IDictionary 界面，所以你可以使用它：

Dictionary<TKey, TValue> also implements the non-generic IDictionary interface, so you can use that:

IDictionary d = (IDictionary) o;
foreach(DictionaryEntry entry in d)
{
    output[(string) entry.Key] = entry.Value;
}

请注意，如果键类型不是<$ c，这显然会失败$ c> string ...虽然您可以调用 ToString 而不是转换。

Note that this will obviously fail if the key type isn't string... although you could call ToString instead of casting.

您可以轻松地检查任何 IDictionary 实现，而不仅仅是 Dictionary<，> - 甚至没有讨厌的反射检查：

You can easily check for any IDictionary implementation, in fact - not just Dictionary<,> - without even having the nasty reflection check:

IDictionary dictionary = info.GetValue(this, null) as IDictionary;
if (dictionary != null)
{
    foreach (DictionaryEntry entry in dictionary)
    {
        output[(string) entry.Key] = entry.Value;
    }
}

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