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'开始时间
Dim startDay As DateTime = DateTime.Now.[Date]
'截止时间
Dim endDay As New DateTime(2015, 12, 1)
Dim d As DateTime = startDay
While d <= endDay
'每循环一次,时间d增加一天
d.AddDays(1)
End While
Dim d As DateTime = startDay
While d <= endDay
'每循环一次,时间d增加一小时
d.AddHours(1)
End While