在SQL Server 2005 Reporting Services 報表中格式化日期的方法可以 FormatDateTime的函數，下面是它的定義：Visual Basic (Declaration) Public Shared Function FormatDateTime ( _ Expression As DateTime, _ <OptionalAttribute> Optional NamedFormat As DateFormat = DateFormat.GeneralDate _ ) As StringVisual Basic (Usage) Dim Expression As DateTime Dim NamedFormat As DateFormat Dim returnValue As String returnValue = Strings.FormatDateTime(Expression, NamedFormat)

下面是NamedFormat 的定義：ConstantDescriptionDateFormat.GeneralDate Display a date and/or time. Display a date part as a short date. If there is a time part, display it as a long time. If present, both parts display.DateFormat.LongDate Display a date using the long date format specified in your computer's regional settings.DateFormat.ShortDate Display a date using the short date format specified in your computer's regional settings.DateFormat.LongTime Display a time using the time format specified in your computer's regional settings.DateFormat.ShortTime Display a time using the 24-hour format (hh:mm).

它的類型就這么幾種，很有限的，遠遠不能滿足我們的需要。那怎么辦？

實際上在報表中可以使用 ToString 的方法，來定義任意格式的字符串格式。比如：cdate（“2007-12-12 1：3：40”）.ToString('yyyy-MM-dd') 可以格式化成 2007-12-12的格式，還可以格式化成12/12/2007這樣的格式，甚至可以格式化成 2007+12+12這樣的格式。這樣只要你的format 格式化字符串正確，就可以實現你想要的日期格式。