使用JavaScriptSerializer.DeserializeObject如何获取使用不区分大小写的字符串比较器的Dictionary？

Question

我有一些JSON,我需要反序列化,所以我使用JavaScriptSerializer.DeserializeObject,如:

var jsonObject = serializer.DeserializeObject(line) as Dictionary<string, object>;

问题是返回的Dictionary有一个区分大小写的密钥比较器,但我需要不区分大小写.有没有办法找回不区分大小写的Dictionary？

编辑:我不想将数据复制到新的结构,因为我有很多数据,这将是昂贵的.

Answer 1

只需创建一个新的不区分大小写的字典,并使用当前字典填充它.

var jsonObject = serializer.DeserializeObject(line) as Dictionary<string, object>;
var caseInsensitiveDictionary = new Dictionary<string, object>(jsonObject, StringComparer.OrdinalIgnoreCase);

[更新]测试代码:

    Stopwatch stop1 = new Stopwatch();
    Stopwatch stop2 = new Stopwatch();

    //do test 100 000 times
    for (int j = 0; j < 100000; j++)
    {
        //generate fake data
        //object with 50 properties
        StringBuilder json = new StringBuilder();
        json.Append('{');
        for (int i = 0; i < 100; i++)
        {
            json.Append(String.Format("prop{0}:'val{0}',", i));
        }
        json.Length = json.Length - 1;
        json.Append('}');

        var line = json.ToString();

        stop1.Start();
        var serializer = new JavaScriptSerializer();
        var jsonObject = serializer.DeserializeObject(line) as Dictionary<string, object>;
        stop1.Stop();

        stop2.Start();
        var caseInsensitiveDictionary = new Dictionary<string, object>(jsonObject, StringComparer.OrdinalIgnoreCase);
        stop2.Stop();
    }

    Console.WriteLine(stop1.Elapsed);
    Console.WriteLine(stop2.Elapsed);
    Console.Read();

结果是:

反序列化时间:1分21秒

字典创建时间:3秒

因此,主要问题是反序列化.字典创作约4%