C# JSON根据键的ASCII码进行排序

要求：
1、按照第一个字符的键值 ASCII 码递增排序（字母升序排序），如果遇到相同字符则按照第二个字符的键值 ASCII 码递增排序，以此类推。
2、所有节点数据字段均需要排序，即所有子节点和深度底层节点的数据字段。

方法一

static void Main(string[] args)
{
    JObject jObject = new JObject()
    {
        { "ptId", "12345678" },
        { "ptName", "Test" },
        { "pta", "0000" },
    };
    SortedDictionary<string, object> target = KeySort(jObject);
    string strPostData = JsonConvert.SerializeObject(target);
    JObject newJ = JObject.Parse(strPostData);
    Console.WriteLine(newJ);
}

private static SortedDictionary<string, object> KeySort(JObject obj)
{
    // 重点在于增加了一个 StringComparer.Ordinal 属性
    var res = new SortedDictionary<string, object>(StringComparer.Ordinal);
    foreach (var x in obj)
    {
        if (x.Value is JValue) res.Add(x.Key, x.Value);
        else if (x.Value is JObject @object) res.Add(x.Key, KeySort(@object));
        else if (x.Value is JArray)
        {
            JArray jArray = (JArray)x.Value;
            var tmp = new SortedDictionary<string, object>[jArray.Count];
            for (var i = 0; i < jArray.Count; i++)
            {
                tmp[i] = KeySort((JObject)x.Value[i]);
            }
            res.Add(x.Key, tmp);
        }
    }
    return res;
}

方法二：

static void Main(string[] args)
{
    JObject jObject = new JObject()
    {
        { "ptId", "12345678" },
        { "ptName", "Test" },
        { "pta", "0000" },
    };
    // 同样的使用了 StringComparer.Ordinal 属性
    var sk = jObject.Properties().OrderBy(p => p.Name, StringComparer.Ordinal);

    JObject newJ = new JObject();
    foreach (var item in sk)
    {
        newJ.Add(item);
    }
    Console.WriteLine(newJ);
}

方法三：

namespace MyNameSpace
{
    public class Program()
    {
        static void Main(string[] args)
        {
            JObject jObject = new JObject()
            {
                { "ptId", "12345678" },
                { "ptName", "Test" },
                { "pta", "0000" },
            };
            SortedDictionary<string, object> target = KeySort(jObject);
            string strPostData = JsonConvert.SerializeObject(target);
            JObject newJ = JObject.Parse(strPostData);
            Console.WriteLine(newJ);
        }

        private static SortedDictionary<string, object> KeySort(JObject obj)
        {
            // 使用比较器
            // 这种方法可以用来实现更复杂的排序，在这里只是提供一种思路
            var res = new SortedDictionary<string, object>(new AsciiCompare());
            foreach (var x in obj)
            {
                if (x.Value is JValue) res.Add(x.Key, x.Value);
                else if (x.Value is JObject @object) res.Add(x.Key, KeySort(@object));
                else if (x.Value is JArray)
                {
                    JArray jArray = (JArray)x.Value;
                    var tmp = new SortedDictionary<string, object>[jArray.Count];
                    for (var i = 0; i < jArray.Count; i++)
                    {
                        tmp[i] = KeySort((JObject)x.Value[i]);
                    }
                    res.Add(x.Key, tmp);
                }
            }
            return res;
        }
    }

    // 增加一个比较器
    public class  AsciiCompare : IComparer<string>
    {
        public int Compare(string x, string y)
        {
            return string.CompareOrdinal(x, y);
        }
    }    
}