Linq To SQL, ASMX service using JSON and wrong date returned

I have been working on a site (manage reminders) and faced a crazy situation of date time shifted while trying to consume an ASMX web service using JSON.

The flow is like this:

  1. From browser i am calling API to insert reminder to DB , one of the properties is due date as date time. Data inserted correctly and i see that the date time is in UTC – for example customer wanted due date at 1/1/2000 10:10:00 AM (he is in GMT+2) and data saved is in 8:10:00 AM (move to UTC) – That is ok
  2. On another page i am calling a API to get the list of reminders, when i look at the grid that i have rendered on client side i see that there is a 2 hours difference (i am calling my own server and more over the response should have been with UTC).

i started analyzing the issue

Page flow

And finally came to the root cause:

  1. When LINQ makes a query to the DB the date time columns are assumed to be DateTimeKind.Unspecified (this is mentioned here under System.DateTime section)
  2. The response from the ASMX is still being shifted to UTC

I truly don't understand this behavior, Do you!?

As a workaround, i projected a new DateTime and initialized it with the ticks of the original and UTC kind), something like this “DueDate = new DateTime(reminder.DueDate.Ticks, DateTimeKind.Utc)”

Not that it matters but my apps is fully client centric :)

Linq To SQL, ASMX service using JSON and wrong date returned Linq To SQL, ASMX service using JSON and wrong date returned Reviewed by Ran Davidovitz on 4:13 PM Rating: 5
Powered by Blogger.