I have the following ASP.Net MVC Controller method:
public ActionResult DoSomething(DateTime utcDate)
{
var localTime = utcDate.ToLocalTime();
}
The problem is that localTime will have the exact same value as utcDate. I assume this is because utcDate doesn't know it has a UTC value. So my question is how can I convert utcDate (which I KNOW is UTC) into local?
If you know the DateTime
contains a UTC value, you can use the following:
DateTime iKnowThisIsUtc = whatever;
DateTime runtimeKnowsThisIsUtc = DateTime.SpecifyKind(
iKnowThisIsUtc,
DateTimeKind.Utc);
DateTime localVersion = runtimeKnowsThisIsUtc.ToLocalTime();
For example, in my current application, I create timestamps in my database with SQL's utcnow
, but when I read them into my C# application the Kind
proeprty is always Unknown
. I created a wrapper function to read the timestamp, deliberately set its Kind
to Utc
, and then convert it to local time - essentially as above.
Note that DateTime.ToLocalTime()
only doesn't affect the value if one (or both) of the following holds:
DateTime
's Kind
property is DateTimeKind.Local
I think we can assume the second point isn't true. Thus it seems that iKnowThisIsUtc
's Kind
property is set to Local
already. You need to figure out why whatever is supplying you with these DateTime
s thinks they are local.