Setting different time zone in IIS or web.config

Question

I am logging time in many places

If Request.DynamicSettings.AirlineSettings.AirlineGeneralSettings.TimeLogEnabled Then
                        StartTime = DateTime.Now
                        LogTime(Reflection.MethodBase.GetCurrentMethod.DeclaringType.FullName, Reflection.MethodBase.GetCurrentMethod.Name, StartTime, DateTime.Now, "AB-SCR(I)", 0,)
    End If

all places i have used

DateTime.Now

I am facing an issue now, I am currently hosting this in a gulf server, GMT +4:00 I need to host this same project for another country at Gmt +3Gmt for this hosting i need time to be logged using that country's local time.

Is there any way to do this, without having to modify each and every line of my code.

i have seen this article timzone with asp.net but as my service is already up i have a lot of codes to change, i am looking for a simpler solution.

thanks.

What happens inside `LogTime`? Are you logging the actual time of day? Or are you subtracting the two `DateTime` values to measure how long the action took? — Matt Johnson-Pint, Nov 21 '15 at 04:59
i just put a part of the code, this is for calculating time diffrence, what i really mean is about the datetime.now() function. — fizmhd, Nov 21 '15 at 06:28

score 10 · Accepted Answer · edited May 23 '17 at 12:25

A few things:

You cannot change the time zone in the IIS configuration or web.config. This is not an IIS problem, but rather a problem in your application code.
DateTime.Now should never be used in a server side application, such as an ASP.Net web application. Read The case against DateTime.Now.

If you are just timing how long something takes to run, don't use DateTime at all. Instead, use System.Diagnostics.Stopwatch.

Stopwatch sw = Stopwatch.StartNew();
// ...do some work ...
sw.Stop();
TimeSpan elapsed = sw.Elapsed;  // how long it took will be in the Elapsed property

If you actually want the current time in a specific time zone, then you need to know the time zone identifier. (GMT+4 and GMT+3 are not time zones, but rather time zone offsets see "Time Zone != Offset" in the timezone tag wiki.) You can see a list of Windows time zones by using TimeZoneInfo.GetSystemTimeZones(), or by calling tzutil /l on the command line.

Then in your application:
```
string tz = "Arabian Standard Time";
DateTime now = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, tz);
```
You should probably refactor your code such that this is done inside your LogTime method. Then you will have only one place to set the time zone for your application.

Setting different time zone in IIS or web.config

1 Answers1