datetimeformatinfo

问题 I accidentally passed 0 into DateTimeFormatInfo 's GetMonthName method: DateTimeFormatInfo info = new DateTimeFormatInfo(); var monthName = info.GetMonthName(0); and got a System.ArgumentOutOfRangeException with this error message: Valid values are between 1 and 13, inclusive. Passing in 1 through to 12 return "January" through to "December" but passing in 13 returns an empty string. I can see why month numbers are not zero indexed, but what's month 13 for? 回答1: It's because calendar objects

问题 I am trying to insert into a database - various details about an event. The asp.net textbox is using the Calendar Extender (so a little calendar pops up and fills the textbox with a correctly formatted date). The EventDate field in my Access database is of the type Date/Time. I need to convert the text/string to date/time format I have tried this so far: VB: Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim oleDbConn As New OleDb.OleDbConnection

问题 I'm trying to define an interval that repeats every year, starting on the 4th Thursday of November at 13:30z and ending on the same day at 15:00z. Can this be done using ISO 8601? 回答1: This kind of recurrence can't be expressed with current ISO 8601. Next version of ISO 8601 will most likely include a recurring time interval format based on iCalendar (RFC 5545:2009). 来源： https://stackoverflow.com/questions/46229717/iso-8601-define-repeating-interval-on-thanksgiving