【越飞越高讲堂1】ActiveX 和脚本技术在CAD的运用

highflybird

ADODB.Stream
展示如何打包二进制文件和读写二进制文件。

1. 
   
2. (defun c:test ()
   
3.   ;;Read a Binary  file
   
4.   (defun ReadBinary (FileName / stream arr)
   
5.     (setq stream (vlax-create-object "ADODB.Stream"))
   
6.     (vlax-put stream 'type 1)       ;adTypeBinary
   
7.     (vlax-invoke stream 'open)      ;adModeRead  =1 adModeWrite  =2 adModeReadWrite =3
   
8.     (vlax-invoke stream 'LoadFromFile filename)
   
9.     (setq Arr (vlax-invoke-method stream 'read (vlax-get stream 'SIZE)));read stream
   
10.     (vlax-invoke stream 'close)
    
11.     (vlax-release-object stream)
    
12.     (vlax-safearray->list (vlax-variant-value arr))   ;if a large size file ,it will take a long time in this step
    
13.   )
    
14.   ;;Write to a Binary  file from a text stream
    
15.   (defun WriteBinary (FileName Array / stream)
    
16.     (setq stream (vlax-create-object "ADODB.Stream"))
    
17.     (vlax-put stream 'type 1)       ;adTypeBinary
    
18.     (vlax-invoke stream 'open)      ;adModeRead  =1 adModeWrite  =2 adModeReadWrite =3
    
19.     (vlax-invoke-method stream 'Write array)    ;write stream
    
20.     (vlax-invoke stream 'saveToFile fileName 2)    ;save
    
21.     (vlax-invoke stream 'close)
    
22.     (vlax-release-object stream)
    
23.   )
    
24. 
    
25.   (setq path (getfiled "Please select a binary file:" "c:/" "" 8 ))     ;get file path
    
26.   (setq f (open "C:\\test.txt" "W"))
    
27.   (setq data (readBinary path))
    
28.   (princ data f)
    
29.   (close F)
    
30.   ;;(setq stream (vl-get-resource "test"))                              ;we can wrap this text file into .vlx file
    
31.   (setq f (open "C:\\test.txt" "R"))                                    ;open for read
    
32.   (setq l "")
    
33.   (while (setq s (read-line f))
    
34.     (setq l (strcat l s))
    
35.   )
    
36.   (setq array (read l))
    
37.   (close f)
    
38.   
    
39.   (setq dat (vlax-make-safearray 17 (cons 0 (1- (length array)))))      ;17 for unsigned char
    
40.   (vlax-safearray-fill dat array)
    
41.   (setq bin (vlax-make-variant dat))
    
42.   (writeBinary "C:\\test.jpg" bin)     ;write binary file.
    
43. )
    
44. 
    

<br /> (defun c:test ()<br />   ;;Read a Binary  file <br />   (defun ReadBinary (FileName / stream arr)<br />     (setq stream (vlax-create-object "ADODB.Stream"))<br />     (vlax-put stream 'type 1)       ;adTypeBinary<br />     (vlax-invoke stream 'open)      ;adModeRead  =1 adModeWrite  =2 adModeReadWrite =3<br />     (vlax-invoke stream 'LoadFromFile filename)<br />     (setq Arr (vlax-invoke-method stream 'read (vlax-get stream 'SIZE)));read stream<br />     (vlax-invoke stream 'close)<br />     (vlax-release-object stream)<br />     (vlax-safearray->list (vlax-variant-value arr))   ;if a large size file ,it will take a long time in this step<br />   )<br />   ;;Write to a Binary  file from a text stream<br />   (defun WriteBinary (FileName Array / stream)<br />     (setq stream (vlax-create-object "ADODB.Stream"))<br />     (vlax-put stream 'type 1)       ;adTypeBinary<br />     (vlax-invoke stream 'open)      ;adModeRead  =1 adModeWrite  =2 adModeReadWrite =3<br />     (vlax-invoke-method stream 'Write array)    ;write stream<br />     (vlax-invoke stream 'saveToFile fileName 2)    ;save<br />     (vlax-invoke stream 'close)<br />     (vlax-release-object stream)<br />   )<br /> <br />   (setq path (getfiled "Please select a binary file:" "c:/" "" 8 ))     ;get file path<br />   (setq f (open "C:\\test.txt" "W"))<br />   (setq data (readBinary path))<br />   (princ data f)<br />   (close F)<br />   ;;(setq stream (vl-get-resource "test"))                              ;we can wrap this text file into .vlx file<br />   (setq f (open "C:\\test.txt" "R"))                                    ;open for read<br />   (setq l "")<br />   (while (setq s (read-line f))<br />     (setq l (strcat l s))<br />   )<br />   (setq array (read l))<br />   (close f)<br />   <br />   (setq dat (vlax-make-safearray 17 (cons 0 (1- (length array)))))      ;17 for unsigned char<br />   (vlax-safearray-fill dat array)<br />   (setq bin (vlax-make-variant dat))<br />   (writeBinary "C:\\test.jpg" bin)     ;write binary file.<br /> )<br /> <br />

skynoon

                     

328302216

楼主厉害啊！原来我还以为LISP只能画图呢~

wbx103

太震撼了。收藏以备学习。

zj2005mark

难道是学计算机的出身？佩服呀

urdiafa

thank a lot thank a lot....

byghbcx

强烈顶一下

lhtfh

高人，值得学习和赞扬

yjr111

我想先闭门进修一段时间再来看，不然头很晕

zdqwy19

错误: ADODB.Stream: 文件无法被打开。