WCF error when converting datetime to json format

Question

I have a WCF service that returns JSON.

Since this morning, I started to get the following error:

DateTime values that are greater than DateTime.MaxValue or smaller than DateTime.MinValue when converted to UTC cannot be serialized to JSON

Just for the test, I passed today's date to all the DateTime variables that are being returned using JSON, but I stil get the same error.

The code is around 2k rows, so I see no value in posting it here.

Any idea how to solve it??

Answer 1

I suspect you have a DateTime value that is uninitialized - defaults to DateTime.MinValue local time. This can not be converted to UTC if your local timezone is ahead of UTC, because doing so would result in a negative Ticks value.

Either find the uninitialized value and correct it, or move to the USA :)

Another solution might be to use a nullable value (DateTime? in place of DateTime).

This defaults to null rather than DateTime.MinValue, so you should be able to serialize an uninitialized value.