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I have a TimeZoneInfo property on some object which I need to save to a Microsoft SQL Server 2008 database. What type of database field type should I use, please?
If it helps, I’m also using Entity Framework 4, which came with my Visual Studio 2010.
You should use the ID of the
TimeZoneInfo– as then you can retrieve the original zone again withTimeZoneInfo.FindSystemTimeZoneById.Note that while storing dates and times as a
DateTimeOffsetis a valid alternative in some situations, it isn’t sufficient for all. For example, suppose you want to store the information that you have a 3pm meeting every week. Storing a single instance of that as aDateTimeOffsetwon’t tell you when the meeting is next week – because you won’t know whether daylight saving time has changed. (In that situation you’d probably want to store the local time of day, the fact that it’s a weekly meeting, and the day of the week. Recurrence rules get complicated fast, unfortunately.)