WCF DataContractJsonSerializer 如何反序列化 json DateTime？

Question

I have 2 datetime json strings, the only difference is the offset part, one is -08, the other one is -09:

"/Date(946713600000-0800)/"
"/Date(946713600000-0900)/"

When I deserialize them using DataContractJsonSerializer

var serializer = new DataContractJsonSerializer(typeof(DateTime));

byte[] byteArray1 = Encoding.UTF8.GetBytes("\"\\/Date(946713600000-0800)\\/\"");
MemoryStream stream1 = new MemoryStream(byteArray1);
var datetime1 = serializer.ReadObject(stream1 );

byte[] byteArray2 = Encoding.UTF8.GetBytes("\"\\/Date(946713600000-0900)\\/\"");
MemoryStream stream2 = new MemoryStream(byteArray2);
var datetime2 = serializer.ReadObject(stream2 );

The result supersize me, datetime1 and datetime2 are exactly the same! both are {1/1/2000 12:00:00 AM}, datetime1.Kind and datetime2.Kind are both Local.

I expect they have one hour difference. Why they are same?

Answer 1

The time portion is the same value between the two dates. The offset, represented as -0900 and -0800, in your example, is just extra information that denotes the offset from UTC that the local time was captured in.