使用Visual Basic进行文件排序

Question

如何对目录中的文件进行排序？

我会有500多个以下格式的文件。

prod_orders_XXX_<TimeStamp>.dat 
XXX         =  symbol of the product and the length may varies between 3-6.
<TimeStamp> =  date and time

同一XXX的多个文件可能具有不同的时间戳。

以下是一些例子：

prod_orders_abc_20122001083000.dat 
prod_orders_abc_20122001083111.dat 
prod_orders_xyz_20122001093157.dat 
prod_orders_xyz_20122001083000.dat 
prod_orders_abc_20122001163139.dat 
prod_orders_abc_20122001093137.dat

Answer 1

请下次立即提供正确的样本文件和要求；）

以下是您需要的：

Dim fileList = (From file In New IO.DirectoryInfo(directoryPath).GetFiles()
          Where file.Name.IndexOf("prod_orders_") > -1
          Let dateIndex = file.Name.LastIndexOf("_") + 1
          Let dateIndexEnd = file.Name.LastIndexOf(".")
          Let datePart = file.Name.Substring(dateIndex, dateIndexEnd - dateIndex)
          Where datePart.Length = 14 AndAlso ULong.TryParse(datePart, 0)
          Let year = Int32.Parse(datePart.Substring(0, 4))
          Let day = Int32.Parse(datePart.Substring(4, 2))
          Let month = Int32.Parse(datePart.Substring(6, 2))
          Let hour = Int32.Parse(datePart.Substring(8, 2))
          Let minute = Int32.Parse(datePart.Substring(10, 2))
          Let second = Int32.Parse(datePart.Substring(12, 2))
          Let timestamp = New Date(year, month, day, hour, minute, second)
          Order By timestamp Descending
          Select file).ToList()