Json.NET期望多维数组的格式应该像JSON文件中的3d锯齿状数组,但是您的格式就像2d锯齿状数组字典。您可以使用custom JsonConverter
以JSON这样的格式转换为3D阵列,像这样:
public class Array3DConverter : JsonConverter
{
public override bool CanConvert(Type objectType)
{
if (!objectType.IsArray)
return false;
return objectType.GetArrayRank() == 3;
}
object ReadJsonGeneric<T>(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
return null;
if (reader.TokenType == JsonToken.StartArray)
{
// Handle case when it's actually a 3d array in the JSON.
var list = serializer.Deserialize<List<List<List<T>>>>(reader);
return list.Select((l, i) => new KeyValuePair<int, List<List<T>>>(i, l)).To3DArray();
}
else if (reader.TokenType == JsonToken.StartObject)
{
// Handle case when it's a dictionary of key/value pairs.
var dictionary = serializer.Deserialize<SortedDictionary<int, List<List<T>>>>(reader);
return dictionary.To3DArray();
}
else
{
throw new JsonSerializationException("Invalid reader.TokenType " + reader.TokenType);
}
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
return null;
try
{
var elementType = objectType.GetElementType();
var method = GetType().GetMethod("ReadJsonGeneric", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public);
return method.MakeGenericMethod(new[] { elementType }).Invoke(this, new object[] { reader, objectType, existingValue, serializer });
}
catch (TargetInvocationException ex)
{
// Wrap the TargetInvocationException in a JsonSerializerException
throw new JsonSerializationException("Failed to deserialize " + objectType, ex);
}
}
public override bool CanWrite { get { return false; } }
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
throw new NotImplementedException();
}
}
public static class EnumerableExtensions
{
public static T[,,] To3DArray<T>(this IEnumerable<KeyValuePair<int, List<List<T>>>> jaggedArray)
{
if (jaggedArray == null)
throw new ArgumentNullException("jaggedArray");
var counts = new int[3];
foreach (var pair in jaggedArray)
{
var i = pair.Key;
counts[0] = Math.Max(i + 1, counts[0]);
if (pair.Value == null)
continue;
var jCount = pair.Value.Count;
counts[1] = Math.Max(jCount, counts[1]);
for (int j = 0; j < jCount; j++)
{
if (pair.Value[j] == null)
continue;
var kCount = pair.Value[j].Count;
counts[2] = Math.Max(kCount, counts[2]);
}
}
var array = new T[counts[0], counts[1], counts[2]];
foreach (var pair in jaggedArray)
{
var i = pair.Key;
if (pair.Value == null)
continue;
var jCount = pair.Value.Count;
for (int j = 0; j < jCount; j++)
{
if (pair.Value[j] == null)
continue;
var kCount = pair.Value[j].Count;
for (int k = 0; k < kCount; k++)
array[i, j, k] = pair.Value[j][k];
}
}
return array;
}
}
然后使用它像:
var array = JsonConvert.DeserializeObject<double[, ,]>(jsonString, new JsonSerializerSettings { Converters = new[] { new Array3DConverter() } });
或者,如果你已经解析您的JSON字符串一个JObject
,你可以使用JToken.ToObject<T>(JsonSerializer)
使用转换器反序列化到你想要的类型:
var array = jObj.ToObject<double[, ,]>(JsonSerializer.CreateDefault(new JsonSerializerSettings { Converters = new[] { new Array3DConverter() } }));
对于在使用中的灵活性,转换器测试查看传入的JSON是否被格式化为对象或数组并进行适当的响应。
注 - 仅轻微测试。
'Dictionary'也应该有效,因为属性名称显然是索引。注意'Dictionary'是无序的,因此在反序列化过程中条目的顺序可能会被打乱。 'SortedDictionary '会更好。 –
dbc
,但如果他从Web服务接收内容,则这不起作用 –