We Keep Coding

How to get country wise / timezone wise date & time from internet server

i have to show date & time to user as per the user timezone id. i can not rely on user pc date time and setting. i was searching Google for the way and got a below code. code seems will query many external server for date & time but one thing not clear to me what kind of date & time i can expect from the below code.
some time i need india time. some time i need london time and some time i need other country local time. few county has many timezone that is why i want to send timezone id/name and want to get datetime based on timezone id/name.
so just guide me how to customize the below code where i can send user's side timezone id and routine will return right local time based on timezone id even if user pc datetime setting is wrong. looking for good help. thanks
public static DateTime GetFastestNISTDate()
{
var result = DateTime.MinValue;
// Initialize the list of NIST time servers
// http://tf.nist.gov/tf-cgi/servers.cgi
string[] servers = new string[] {
"nist1-ny.ustiming.org",
"nist1-nj.ustiming.org",
"nist1-pa.ustiming.org",
"time-a.nist.gov",
"time-b.nist.gov",
"nist1.aol-va.symmetricom.com",
"nist1.columbiacountyga.gov",
"nist1-chi.ustiming.org",
"nist.expertsmi.com",
"nist.netservicesgroup.com"
};
// Try 5 servers in random order to spread the load
Random rnd = new Random();
foreach (string server in servers.OrderBy(s => rnd.NextDouble()).Take(5))
{
try
{
// Connect to the server (at port 13) and get the response
string serverResponse = string.Empty;
using (var reader = new StreamReader(new System.Net.Sockets.TcpClient(server, 13).GetStream()))
{
serverResponse = reader.ReadToEnd();
}
// If a response was received
if (!string.IsNullOrEmpty(serverResponse))
{
// Split the response string ("55596 11-02-14 13:54:11 00 0 0 478.1 UTC(NIST) *")
string[] tokens = serverResponse.Split(' ');
// Check the number of tokens
if (tokens.Length >= 6)
{
// Check the health status
string health = tokens[5];
if (health == "0")
{
// Get date and time parts from the server response
string[] dateParts = tokens[1].Split('-');
string[] timeParts = tokens[2].Split(':');
// Create a DateTime instance
DateTime utcDateTime = new DateTime(
Convert.ToInt32(dateParts[0]) + 2000,
Convert.ToInt32(dateParts[1]), Convert.ToInt32(dateParts[2]),
Convert.ToInt32(timeParts[0]), Convert.ToInt32(timeParts[1]),
Convert.ToInt32(timeParts[2]));
// Convert received (UTC) DateTime value to the local timezone
result = utcDateTime.ToLocalTime();
return result;
// Response successfully received; exit the loop
}
}
}
}
catch
{
// Ignore exception and try the next server
}
}
return result;
}
EDIT
var wc = GetFastestNISTDate();
var pattern = InstantPattern.CreateWithInvariantCulture("dd/MM/yyyy HH:mm:ss");
var parseResult = pattern.Parse(wc.ToString("dd/MM/yyyy HH:mm:ss", CultureInfo.InvariantCulture));
if (!parseResult.Success)
throw new InvalidDataException("...whatever...");
var instant = parseResult.Value;
var timeZone = DateTimeZoneProviders.Tzdb["Europe/London"];
var zonedDateTime = instant.InZone(timeZone);
var bclDateTime = zonedDateTime.ToDateTimeUnspecified();
timezone translation is not working. i got the right date from this function GetFastestNISTDate(); and next i try to get local date and time of different timezone based on my first utc time but code return wrong time for London. i guess i am making mistake the code. can anyone see & help. thanks

DateTime tzDateTime = TimeZoneInfo.ConvertTimeFromUtc(utcDateTime, TimeZone);
Hope this helps.

The timeservers will report UTC time (that's why the variable is named utcDateTime).
The result = utcDateTime.ToLocalTime(); line converts that UTC time from the timeserver to the local time according to the timezone your computer is in. If you want a different timezone, you need to change that line.
As amit mentioned, you can use TimeZoneInfo.ConvertTimeFromUtc to convert to some specified timezone. See the example on that page.
TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");
DateTime cstTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, cstZone);

How Convert UTC Date & time to local time using different timezone Nodatime

i am using a function which is taking date time over the internet from external server.
here is the function which i am using to get date and time without depend on user pc date time settings.
using NodaTime;
using NodaTime.Text;
using System.IO;
using System.Globalization;
public static DateTime GetFastestNISTDate()
{
var result = DateTime.MinValue;
DateTime utcDateTime = DateTime.MinValue;
// Initialize the list of NIST time servers
// http://tf.nist.gov/tf-cgi/servers.cgi
string[] servers = new string[] {
"nist1-ny.ustiming.org",
"nist1-nj.ustiming.org",
"nist1-pa.ustiming.org",
"time-a.nist.gov",
"time-b.nist.gov",
"nist1.aol-va.symmetricom.com",
"nist1.columbiacountyga.gov",
"nist1-chi.ustiming.org",
"nist.expertsmi.com",
"nist.netservicesgroup.com"
};
// Try 5 servers in random order to spread the load
Random rnd = new Random();
foreach (string server in servers.OrderBy(s => rnd.NextDouble()).Take(5))
{
try
{
// Connect to the server (at port 13) and get the response
string serverResponse = string.Empty;
using (var reader = new StreamReader(new System.Net.Sockets.TcpClient(server, 13).GetStream()))
{
serverResponse = reader.ReadToEnd();
}
// If a response was received
if (!string.IsNullOrEmpty(serverResponse))
{
// Split the response string ("55596 11-02-14 13:54:11 00 0 0 478.1 UTC(NIST) *")
string[] tokens = serverResponse.Split(' ');
// Check the number of tokens
if (tokens.Length >= 6)
{
// Check the health status
string health = tokens[5];
if (health == "0")
{
// Get date and time parts from the server response
string[] dateParts = tokens[1].Split('-');
string[] timeParts = tokens[2].Split(':');
// Create a DateTime instance
utcDateTime = new DateTime(
Convert.ToInt32(dateParts[0]) + 2000,
Convert.ToInt32(dateParts[1]), Convert.ToInt32(dateParts[2]),
Convert.ToInt32(timeParts[0]), Convert.ToInt32(timeParts[1]),
Convert.ToInt32(timeParts[2]));
// Convert received (UTC) DateTime value to the local timezone
result = utcDateTime.ToLocalTime();
//return result;
return utcDateTime;
// Response successfully received; exit the loop
}
}
}
}
catch
{
// Ignore exception and try the next server
}
}
//return result;
return utcDateTime;
}
this variable result has local date time but i need to use Nodatime library where i will put my local date time variable result and also specify different timezone and Noda libraray will return local date and time of that timezone.
just guide me how to achieve it. i visit this url but still not clear how to incorporate Nodatime library and local time got from external server together to get another datetime based on different timezone.
looking for help with bit of sample code
thanks
EDIT
var wc = GetFastestNISTDate();
var pattern = InstantPattern.CreateWithInvariantCulture("dd/MM/yyyy HH:mm:ss");
var parseResult = pattern.Parse(wc.ToString("dd/MM/yyyy HH:mm:ss", CultureInfo.InvariantCulture));
if (!parseResult.Success)
throw new InvalidDataException("...whatever...");
var instant = parseResult.Value;
var timeZone = DateTimeZoneProviders.Tzdb["Europe/London"];
var zonedDateTime = instant.InZone(timeZone);
var bclDateTime = zonedDateTime.ToDateTimeUnspecified();
timezone translation is not working. i got the right date from this function GetFastestNISTDate(); and next i try to get local date and time of different timezone based on my first utc time but code return wrong time for London. i guess i am making mistake the code. can anyone see & help. thanks
EDIT 2
the samething i want to achieve by Nodatime library.
var wc = GetFastestNISTDate();
TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time");
DateTime cstTime = TimeZoneInfo.ConvertTimeFromUtc(wc, cstZone);
the above code is giving more or less right time. just tell me how to replace my last 2 line using nodatime library. thanks
Edit 3
var wc = GetFastestNISTDate();
Instant now = Instant.FromDateTimeUtc(wc);
var timeZone = DateTimeZoneProviders.Tzdb["Europe/London"];
var zonedDateTime = instant.InZone(timeZone);
var bclDateTime = zonedDateTime.ToDateTimeUnspecified();
#John just tell me the above code is ok because u said
Don't convert the UTC DateTime to a local version - it's pointless and confusing
Use Instant.FromDateTimeUtc to convert a UTC DateTime to an instant
GetFastestNISTDate() returning datetime instance and here we just create noda instance from utc datetime using like this code `Instant now = Instant.FromDateTimeUtc(wc);`
does it solve the issue.
EDIT 4
#Matt Johnson : thanks a lot for redirecting me to a good library.
i would definitely like to work with that library to achieve my task. before
use your library i have some question.
Point 1
what was wrong you notice in this routine GetFastestNISTDate(); the routine was query few NIST time servers and get the utctime.
utcDateTime = new DateTime(
Convert.ToInt32(dateParts[0]) + 2000,
Convert.ToInt32(dateParts[1]), Convert.ToInt32(dateParts[2]),
Convert.ToInt32(timeParts[0]), Convert.ToInt32(timeParts[1]),
Convert.ToInt32(timeParts[2]));
this routine GetFastestNISTDate(); was returning utcDateTime....was not a utc time ?
Point 2
when i was calling GetFastestNISTDate(); routine i notice some time this routine was returning DateTime.MinValue which was not expected result. i could understand why it was happening because NIST time servers was busy or blocked or timeout occured at that time.
Point 3
if i use your current code/library NodaTime.NetworkClock then i like to know which NTP server it will query by default?
if i use NodaTime.NetworkClock then is there any chance that some time i may get wrong date or null date due to NTP server is busy/block or timeout occur?
EDIT 5
var instant = NetworkClock.Instance.Now;
var timeZone = DateTimeZoneProviders.Tzdb["Europe/London"];
var zonedDateTime = instant.InZone(timeZone);
lbldate.Text = zonedDateTime.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
lbltime.Text = zonedDateTime.ToString("hh:mm:ss", CultureInfo.InvariantCulture);

Your GetFastestNISTDate function uses the daytime protocol - which is essentially deprecated and NOT meant for machine interaction because its results are in no specific format. Even the docs from NIST strongly encourage users to use NTP instead of daytime.
You can find a simple C# implementation of an NTP client here.
To make things easier, I've implemented this client as a NodaTime.IClock. The code is on GitHub here. Simply install it from NuGet:
Install-Package NodaTime.NetworkClock
Then you can use it just like you would use the SystemClock:
var instant = NetworkClock.Instance.Now;
var timeZone = DateTimeZoneProviders.Tzdb["Europe/London"];
var zonedDateTime = instant.InZone(timeZone);

You shouldn't be converting the DateTime to a string and back - but your current problem is that you're converting the UTC value you get back from the server into a local DateTime for no obvious reason. Ideally, I'd suggest changing GetFastestNISTDate() to return an Instant, but assuming you can't do that:
Don't do the parsing yourself. Take the appropriate substring from the response, then use DateTime.ParseExact, specifying CultureInfo.InvariantCulture and DateTimeStyles.AssumeUniversal
Don't convert the UTC DateTime to a local version - it's pointless and confusing
Use Instant.FromDateTimeUtc to convert a UTC DateTime to an instant
The final part of your code (the last three lines) is okay, but why do you need a DateTime at all? If you can make as much of your code as possible use Noda Time, you'll get the greatest benefits in terms of code clarity.

Trouble with DateTime.ParseExact

I am working on a reminder application. The applications stores the reminder Date, Time and DateLastShown (in different fields) in the database and pulls them out to performs checks.
All dates are in "d/MM/yyyy" format. My problem is that when i pull the dates from the DB and try to store back into DateTime format they are still being shown in "M/d/yyyy" format which is not how the app needs to be.
I essentially need to pull the values from the DB do some checks to determine if it's time to show the reminder and do so. It seems rather straight forward, maybe i am making some small error.
Below is my code with comments.
Any help really appreciated.
public void CheckReminders()
{
IQueryable<Reminder> reminders;
DateTime reminderDate;
DateTime reminderTime;
DateTime reminderLastShown;
DateTime todayDate;
DateTime timeNow;
while (true)
{
try
{
db = new StudioManagementEntities();
reminders = from r in db.Reminders
select r;
foreach (Reminder r in reminders)
{
if (r.Enabled == 1)
{
if (r.Recurring == 1)
{
// This is the code i was using before when the date was in "M/d/yyyy" format
// which seems to be default.
reminderTime = DateTime.Parse(r.Time);
timeNow = DateTime.Parse(DateTime.Now.ToLongTimeString());
if (r.DateLastShown != DateTime.Today.ToShortDateString() && timeNow >= reminderTime)
{
FrmReminder frmReminder = new FrmReminder(r.Id, true);
frmReminder.ShowDialog();
r.DateLastShown = DateTime.Today.ToShortDateString();
}
}
else
{
// Now i need to pass in "d/M/yyyy" format but the
// code seems to return in "M/d/yyyy" format.
reminderDate = DateTime.ParseExact(r.Date, "d/MM/yyyy", null);
// Even this returns in wrong format
reminderDate = DateTime.ParseExact("24/01/2013", "d/MM/yyyy", null);
// Have tried with CultureInfo.InvariantCulture too.
MessageBox.Show(reminderDate.ToString());
return;
if (
r.DateLastShown != DateTime.Today.Date.ToShortDateString() //&&
//r.Date == DateTime.ParseExact(DateTime.Today, "d/MM/yyyy", CultureInfo.InvariantCulture).ToString() //&&
//now.TimeOfDay.TotalSeconds >= reminderTime.TimeOfDay.TotalSeconds
)
{
FrmReminder frmReminder = new FrmReminder(r.Id, true);
frmReminder.ShowDialog();
r.DateLastShown = DateTime.Today.ToShortDateString();
}
}
}
}
db.SaveChanges();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
// Check every minute
Thread.Sleep(60000);
}
}
And the DB table.

If the parsing into the date object is not erroring out, you are just having a problem with your output when you call .ToString().
From the docs:
The ToString method returns the string representation of the date and
time in the calendar used by the current culture.
If you need something other than the user's current culture settings, you can specify that using a format string in the overloaded ToString() method:
var reminderDate = DateTime.ParseExact("24/01/2013", "d/MM/yyyy", null);
MessageBox.Show(reminderDate.ToString("d/MM/yyyy"));
Also, as others have stated in comments, if possible you should be using the date data type in your database instead of storing the values as strings.

check if date time string contains time

I have run into an issue. I'm obtaining a date time string from the database and and some of these date time strings does not contain time. But as for the new requirement every date time string should contain the time like so,
1)1980/10/11 12:00:01
2)2010/APRIL/02 17:10:00
3)10/02/10 03:30:34
Date can be in any format followed by the time in 24hr notation.
I tried to detect the existence of time via the following code,
string timestamp_string = "2013/04/08 17:30";
DateTime timestamp = Convert.ToDateTime(timestamp_string);
string time ="";
if (timestamp_string.Length > 10)
{
time = timestamp.ToString("hh:mm");
}
else {
time = "Time not registered";
}
MessageBox.Show(time);
But this only works for the No 1) type timestamps. May I please know how to achieve this task on how to detect if the time element exist in this date time string. Thank you very much :)
POSSIBLE MATCH
How to validate if a "date and time" string only has a time?
INFO the three answers provided by Arun Selva Kumar,Guru Kara,Patipol Paripoonnanonda are all correct and checks for the time and serves my purpose. But I select Guru Karas answer solely on ease of use and for the explanation he has given. Thank you very much :) very much appreciated all of you :)

The date time components TimeOfDay is what you need.
MSDN says "Unlike the Date property, which returns a DateTime value that represents a date without its time component, the TimeOfDay property returns a TimeSpan value that represents a DateTime value's time component."
Here is an example with consideration of all your scenarios.
Since you are sure of the format you can use DateTime.Parse else please use DateTime.TryParse
var dateTime1 = System.DateTime.Parse("1980/10/11 12:00:00");
var dateTime2 = System.DateTime.Parse("2010/APRIL/02 17:10:00");
var dateTime3 = System.DateTime.Parse("10/02/10 03:30:34");
var dateTime4 = System.DateTime.Parse("02/20/10");
if (dateTime1.TimeOfDay.TotalSeconds == 0) {
Console.WriteLine("1980/10/11 12:00:00 - does not have Time");
} else {
Console.WriteLine("1980/10/11 12:00:00 - has Time");
}
if (dateTime2.TimeOfDay.TotalSeconds == 0) {
Console.WriteLine("2010/APRIL/02 17:10:00 - does not have Time");
} else {
Console.WriteLine("2010/APRIL/02 17:10:00 - Has Time");
}
if (dateTime3.TimeOfDay.TotalSeconds == 0) {
Console.WriteLine("10/02/10 03:30:34 - does not have Time");
} else {
Console.WriteLine("10/02/10 03:30:34 - Has Time");
}
if (dateTime4.TimeOfDay.TotalSeconds == 0) {
Console.WriteLine("02/20/10 - does not have Time");
} else {
Console.WriteLine("02/20/10 - Has Time");
}

Try this,
DateTime myDate;
if (DateTime.TryParseExact(inputString, "dd-MM-yyyy hh:mm:ss",
CultureInfo.InvariantCulture, DateTimeStyles.None, out myDate))
{
//String has Date and Time
}
else
{
//String has only Date Portion
}
You can try using other format specifiers as listed here, http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx

Combining the answers of Guru Kara and Patipol Paripoonnanonda with the .net globalisation API results in:
bool HasExplicitTime(DateTime parsedTimestamp, string str_timestamp)
{
string[] dateTimeSeparators = { "T", " ", "#" };
string[] timeSeparators = {
CultureInfo.CurrentUICulture.DateTimeFormat.TimeSeparator,
CultureInfo.CurrentCulture.DateTimeFormat.TimeSeparator,
":"};
if (parsedTimestamp.TimeOfDay.TotalSeconds != 0)
return true;
string[] dateOrTimeParts = str_timestamp.Split(
dateTimeSeparators,
StringSplitOptions.RemoveEmptyEntries);
bool hasTimePart = dateOrTimeParts.Any(part =>
part.Split(
timeSeparators,
StringSplitOptions.RemoveEmptyEntries).Length > 1);
return hasTimePart;
}
This approach:
detects explicit midnight times (e.g. "2015-02-26T00:00");
only searches the string when TimeOfDay indicates midnight or no explicit time; and
finds explicit midnight times in local format and any non midnight time in any format that .net can parse.
Limitations:
explicit midnight times in non culture local format are not detected;
explicit midnight times with less than two parts are not detected; and
less simple and elegant than the approaches of Guru Kara and Patipol Paripoonnanonda.

Here's what I'm going with for now. It may not be perfect, but likely better than considering any 12am datetime as not having a time. The premise is that if I tack a full time specification on the end it will parse if it's just a date but fail if it already has a time component.
I had to make the assumption that there's not some valid, date/time that has 7 non-white-space characters or less. It appears that "1980/10" parses, but not "1980/10 01:01:01.001".
I've included various test cases. Feel free to add your own and let me know if they fail.
public static bool IsValidDateTime(this string dateString, bool requireTime = false)
{
DateTime outDate;
if(!DateTime.TryParse(dateString, out outDate)) return false;
if (!requireTime) return true;
else
{
return Regex.Replace(dateString, #"\s", "").Length > 7
&& !DateTime.TryParse(dateString + " 01:01:01.001", out outDate);
}
}
public void DateTest()
{
var withTimes = new[]{
"1980/10/11 01:01:01.001",
"02/01/1980 01:01:01.001",
"1980-01-01 01:01:01.001",
"1980/10/11 00:00",
"1980/10/11 1pm",
"1980-01-01 00:00:00"};
//Make sure our ones with time pass both tests
foreach(var date in withTimes){
Assert.IsTrue(date.IsValidDateTime(), String.Format("date: {0} isn't valid.", date));
Assert.IsTrue(date.IsValidDateTime(true), String.Format("date: {0} does have time.", date));
}
var withoutTimes = new[]{
"1980/10/11",
"1980/10",
"1980/10 ",
"10/1980",
"1980 01",
"1980/10/11 ",
"02/01/1980",
"1980-01-01"};
//Make sure our ones without time pass the first and fail the second
foreach (var date in withoutTimes)
{
Assert.IsTrue(date.IsValidDateTime(), String.Format("date: {0} isn't valid.", date));
Assert.IsFalse(date.IsValidDateTime(true), String.Format("date: {0} doesn't have time.", date) );
}
var bogusTimes = new[]{
"1980",
"1980 01:01",
"80 01:01",
"1980T01",
"80T01:01",
"1980-01-01T01",
};
//Make sure our ones without time pass the first and fail the second
foreach (var date in bogusTimes)
{
DateTime parsedDate;
DateTime.TryParse(date, out parsedDate);
Assert.IsFalse(date.IsValidDateTime(), String.Format("date: {0} is valid. {1}", date, parsedDate));
Assert.IsFalse(date.IsValidDateTime(true), String.Format("date: {0} is valid. {1}", date, parsedDate));
}
}

Would this work for your use case:
bool noTime = _datetimevalue.TimeOfDay.Ticks == 0;
If no time component exists in the DateTime instance, Ticks will be 0.

Date and time are always separated by a space bar. The easiest way would be:
if (timestamp_string.Split(' ').Length == 2)
{
// timestamp_string has both date and time
}
else
{
// timestamp_string only has the date
}
This code assumes the date always exists.
If you want take it further (in case the date does not exist), you can do:
if (timestamp_string.Split(' ')
.Select(item => item.Split(':').Length > 1)
.Any(item => item))
{
// this would work for any string format that contains date, for example:
// 2012/APRIL/03 12:00:05 -> this would work
// 2013/04/05 09:00:01 -> this would work
// 08:50:45 2013/01/01 -> this would also work
// 08:50:50 -> this would also work
}
else
{
// no date in the timestamp_string at all
}
Hope this helps!

DataContractJsonSerializer DateTime implicit timezone conversion

I have a date time in the database and I retrieve it from the database using Entity Framework, I then pass out the data via JSON API through the DataContractJsonSerializer.
The time in the date time field appears to have been adjusted according to the local timezone of the server whilst being processed in DataContractJsonSerializer. The epoch expressed time is 1 hour ahead of the time expected. The DateTime Kind is UTC, but previously it was Unspecified and I had the same issue.
In my application, I wish to convert between timezones explicitly and on the client side, not the server, as this makes more sense. I'm surprised at this implicit functionality as my datetime values should be simple values just like an integer.
thanks

DataContractJsonSerializer will output the timezone portion (+zzzz) if your DateTime.Kind is equal to Local OR Unspecified. This behaviour differs from the XmlSerializer which only outputs the timezone portion if Kind equals Unspecified.
If curious check out the source for JsonWriterDelegator which contains the following method:
internal override void WriteDateTime(DateTime value)
{
// ToUniversalTime() truncates dates to DateTime.MaxValue or DateTime.MinValue instead of throwing
// This will break round-tripping of these dates (see bug 9690 in CSD Developer Framework)
if (value.Kind != DateTimeKind.Utc)
{
long tickCount = value.Ticks - TimeZone.CurrentTimeZone.GetUtcOffset(value).Ticks;
if ((tickCount > DateTime.MaxValue.Ticks) || (tickCount < DateTime.MinValue.Ticks))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.JsonDateTimeOutOfRange), new ArgumentOutOfRangeException("value")));
}
}
writer.WriteString(JsonGlobals.DateTimeStartGuardReader);
writer.WriteValue((value.ToUniversalTime().Ticks - JsonGlobals.unixEpochTicks) / 10000);
switch (value.Kind)
{
case DateTimeKind.Unspecified:
case DateTimeKind.Local:
// +"zzzz";
TimeSpan ts = TimeZone.CurrentTimeZone.GetUtcOffset(value.ToLocalTime());
if (ts.Ticks < 0)
{
writer.WriteString("-");
}
else
{
writer.WriteString("+");
}
int hours = Math.Abs(ts.Hours);
writer.WriteString((hours < 10) ? "0" + hours : hours.ToString(CultureInfo.InvariantCulture));
int minutes = Math.Abs(ts.Minutes);
writer.WriteString((minutes < 10) ? "0" + minutes : minutes.ToString(CultureInfo.InvariantCulture));
break;
case DateTimeKind.Utc:
break;
}
writer.WriteString(JsonGlobals.DateTimeEndGuardReader);
}
I've run the following test on my machine
var jsonSerializer = new DataContractJsonSerializer(typeof(DateTime));
var date = DateTime.UtcNow;
Console.WriteLine("original date = " + date.ToString("s"));
using (var stream = new MemoryStream())
{
jsonSerializer.WriteObject(stream, date);
stream.Position = 0;
var deserializedDate = (DateTime)jsonSerializer.ReadObject(stream);
Console.WriteLine("deserialized date = " + deserializedDate.ToString("s"));
}
which produces the expected output:
original date = 2011-04-19T10:24:39
deserialized date = 2011-04-19T10:24:39
Thus at some point your Date must be Unspecified or Local.
After pulling it out of the DB convert the kind from Unspecified to Utc by calling
entity.Date = DateTime.SpecifyKind(entity.Date, DateTimeKind.Utc);
and don't forget to assign the return value of SpecifyKind back into your object like I have