UTC到夏令时

Question

We are saving all dates in UTC in our database and also saving offset for each user.

We are converting to localtime by following function:

 Private Function ConvertToLocalDateTime(ByVal utcOffset As Integer?, ByVal DateToConvert As DateTime?) As DateTime?

        getdatetime = DateToConvert.Value.AddHours(utcOffset)

        If getdatetime.IsDaylightSavingTime Then
            getdatetime.AddHours(-1)
        End If

        Return getdatetime
    End Function

But still dates are 1 or 2 hours off.

How can we convert correctly to localtime from utcoffset also taking care of daylight saving?

Answer 1

只要将DateToConvert的Kind属性正确设置为Utc ，您就可以调用DateToConvert.ToLocalTime() 。