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int32 be converted to long
There is a example:
object[] a = new object[] {1, 3}; string json = GwJsonSerializeUtil.Serialize(a); var aa = GwJsonSerializeUtil.Deserialize<object[]>(json); var type0 = aa[0].GetType();
GwJsonSerializeUtil is a class just setting some JsonSerializerSettings as follows:
Settings = new JsonSerializerSettings(); Settings.TypeNameHandling = TypeNameHandling.All; Settings.ReferenceLoopHandling = ReferenceLoopHandling.Serialize; Settings.TypeNameAssemblyFormatHandling = TypeNameAssemblyFormatHandling.Full; //Settings.PreserveReferencesHandling = PreserveReferencesHandling.All; Settings.Converters.Add(new ArcEngineIPersistStreamConverter());
the type0 turns out to be int64 type.
The reason I found is about JsonTextReader.cs. What I changed is as follows:
After I changed this codes, I works OK.
object[] Type with custom convertors may cause wrong deserialize result.
in the object array deserialization string, the custom convertor object will lost $type property, which causes the wrong deserialize result. I can only get the JObject type , not my custom Type.
Here is my custom convertor:
/// IPersistStream类型的Json转换器
public class ArcEngineIPersistStreamConverter : JsonConverter
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
if (value == null) return;
var typeName = value.GetType().FullName;
//注意IPersistStream所在的程序集路径在不同电脑上可能不一致，尤其是AE版本不同会出现问题。
//因此，在使用时要保证序列化时的AE版本与反序列化时的AE版本要一致，否则无法反序列化。
var assemblyLocation = value.GetType().Assembly.Location;
IPersistStream pStream = value as IPersistStream;
if (pStream == null) return;
IXMLStream xmlStream = new XMLStreamClass();
pStream.Save(xmlStream as IStream, 0);
//var str = xmlStream.SaveToString();//直接用string反序列化会有问题
var bytes = xmlStream.SaveToBytes();
var str = System.Text.Encoding.Unicode.GetString(bytes);
//string msg = string.Format("{0}&{1}&{2}", assemblyLocation, typeName, str);
//writer.WriteValue(msg);
//另外一种更合理的做法
writer.WriteStartObject();
writer.WritePropertyName("AssemblyLocation");
writer.WriteValue(assemblyLocation);
writer.WritePropertyName("_Type");
writer.WriteValue(typeName);
writer.WritePropertyName("Bytes");
writer.WriteValue(str);
writer.WriteEndObject();
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
//string str = reader.Value as string;
//if (string.IsNullOrEmpty(str))
// return null;
//var strs = str.Split('&');
//if (strs.Length != 3)
// return null;
//try
// IPersistStream pStream = Assembly.LoadFile(strs[0]).CreateInstance(strs[1]) as IPersistStream;
// if (pStream == null) return null;
// IXMLStream xmlStream = new XMLStreamClass();
// //xmlStream.LoadFromString(strs[2]);//直接用string反序列化会有问题
// var bytes = System.Text.Encoding.Unicode.GetBytes(strs[2]);
// xmlStream.LoadFromBytes(bytes);
// pStream.Load(xmlStream as IStream);
// return pStream;
//catch (Exception ex)
// LogHelper.Error.Append(ex);
// return null;
//另外一种更合理的做法
if (reader == null || reader.TokenType == JsonToken.Null)
return null;
JObject jObject = JObject.Load(reader);
string assemblyLocation = jObject["AssemblyLocation"].ToString();
string typeName = jObject["_Type"].ToString();
var bytes = System.Text.Encoding.Unicode.GetBytes(jObject["Bytes"].ToString());
IPersistStream pStream = Assembly.LoadFile(assemblyLocation).CreateInstance(typeName) as IPersistStream;
if (pStream == null) return null;
IXMLStream xmlStream = new XMLStreamClass();
xmlStream.LoadFromBytes(bytes);
pStream.Load(xmlStream as IStream);
return pStream;
catch (Exception ex)
LogHelper.Error.Append(ex);
return null;
public override bool CanConvert(Type objectType)
bool b = typeof(IPersistStream).IsAssignableFrom(objectType);
//这里没有办法严格判断类型，因为如果类型是接口类型，无法判断实现该接口的对象是否实现了IPersistStream接口(属性为接口类型时无法严格判断)
//这里只能依据名字来大致判断
if (b || objectType.FullName.Contains("ESRI") || objectType.Assembly.FullName.Contains("ESRI"))
Console.WriteLine(objectType.FullName);
return true;
return false;
Sorry for my pool English.
