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[其他] ARX function exposure within a separate namespace VLX

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发表于 2021-1-11 20:15:53 | 显示全部楼层 |阅读模式

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问题:
I built a separate namespace vlx from firstasi.lsp, but I cannot connect to
the database with the functions in the loaded asilisp.arx. Why?

解答:
In order to expose a function defined in a loaded ARX application to AutoLISP
code contained in a separate namespace vlx, use the (vl-arx-import) function.

The following AutoLISP code demonstrates how you can use this in a compiled
separate namespace VLX:
  1. (if (member "asilisp.arx" (arx))
  2.   (vl-arx-import "asilisp.arx")
  3.   (setq
  4.     ASI_LISPVERSION nil
  5.   )
  6. )

  7. (defun TestSnspc ()

  8.   (if (and (null ASI_LISPVERSION)
  9.            (null (member "asilisp.arx" (arx)))
  10.       )
  11.     (progn
  12.       (arxload "asilisp.arx")
  13.       (vl-arx-import "asilisp.arx")
  14.     )
  15.   )

  16.   (if (null ASI_LISPVERSION)
  17.     (princ "\nASILisp.ARX was NOT loaded.")
  18.     (princ
  19.       (strcat "\nASI Version (Printing From Separate Namespace) = "
  20.               (ASI_LISPVERSION)
  21.               "\n"
  22.       )
  23.     )
  24.   )
  25.   (princ)
  26. )

  27. (vl-doc-export 'TestSnspc)

  28. (princ "\nTestSnspc loaded, type (TestSnspc) to Run.\n")
  29. (princ)

You can find additional documentation for vl-arx-import in the AutoCAD 2000
readme file. Also refer to the function description in the AutoLISP Reference:

AutoCAD 2000 Readme -> AutoCAD 2000 Documentation Corrections and Additions
-> VL-ARX-IMPORT Required to Access External ObjectARX Functions from a
Separate-Namespace VLX

Visual LISP Developer's Guide -> Appendix A -- AutoLISP Function Synopsis ->
VLX Namespace Functions

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