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内存中进行批处理文件

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发表于 2021-1-26 16:29:12 | 显示全部楼层 |阅读模式

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问题:

Batch process in-memory


解答:

When we try batch process files in memory, we must take special attention to which transaction is in use, but the real trick is how to save the file: AutoCAD will lock the file in use and therefore the SaveAs method is not available for the current file, so the trick could be save as a temporary file and then replace it. This approach can be used to batch process and is faster then open drawings “on scree” (visible). The trade-off is that some features may not be available, such as Layout Manager.

  1.    Public Sub batchProcess()
  2.      ' get all DWG files from a specific folder
  3.      Dim directory As New System.IO.DirectoryInfo("C:\temp")
  4.      Dim files As System.IO.FileInfo() = _
  5.        directory.GetFiles("*.dwg")

  6.      For Each file As System.IO.FileInfo In files
  7.        ' generate a temp file location
  8.        Dim tempFileName As String = _
  9.          System.IO.Path.GetTempFileName()

  10.        Using db As New Database(False, True)
  11.          ' open the current file
  12.          db.ReadDwgFile(file.FullName, _
  13.                         System.IO.FileShare.ReadWrite, _
  14.                         True, String.Empty)

  15.          Using trans As Transaction = _
  16.            db.TransactionManager.StartTransaction()

  17.            ' ToDo:
  18.            ' Do your processing here


  19.            ' commit changes
  20.            trans.Commit()
  21.          End Using

  22.          ' save as temp file
  23.          db.SaveAs(tempFileName, DwgVersion.Current)

  24.        End Using ' dispose the database

  25.        ' now replace
  26.        System.IO.File.Copy(tempFileName, file.FullName, True)
  27.        ' and erase the temp file
  28.        System.IO.File.Delete(tempFileName)
  29.      Next
  30.    End Sub


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