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- Visual LISP中使用ADO接口与MS-Access相连接+ ?4 s1 _3 y# m
- 在Visual LISP中使用Microsoft ActiveX Data Objects (ADO)接口与MS-Access和0 o) s0 n0 s+ l' L" k* q
- SQL Server相连接的例子。
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3 C: \- R# G7 l% y" j1 A* w# u- 通过类型库初始化ADO接口方法:
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! l. b. g. h* \/ C# q; f- (defun DbInitADO ( / ADO_DLLPath), n0 t3 y/ }! J' V+ e. }7 s; d
- (if (null adom-Append)7 [9 \- `7 k6 V( T5 A: F0 g7 R
- (progn
* }$ t: N5 T$ H+ D3 s! C - $ V- f S" {8 E
- ;; 尽管你可以把绝对路径输入到这里,但利用系统查找到的系统7 z* _' i' H# Q% E3 Y& A
- ;; 文件夹将会更加合理,可以避免不必要的错误。' K+ R, l2 {, U0 u! m _0 b
- & ^! Z+ t% P5 f: h6 X' D
- (setq ADO_DLLPath+ P' h, F3 n6 d) @8 m, l: \* ]
- (strcat (getenv "systemdrive"): M, F0 i. w9 N& V! i
- "\\Program Files\\Common Files\\System\\Ado\")2 u- k7 n! ]1 _5 r: I
- )4 [5 E/ E9 h+ Z; f+ a
- 7 o: ^6 `9 c' y. [$ ^5 [
- ;; 如果查找到类型库 ...
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4 G, Q8 t4 p3 b8 D( b2 t1 U5 h- (if (findfile (strcat ADO_DLLPath "msado15.dll"))
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8 G; Q* k6 e: [8 Z9 O$ P" O- u- ;; 将其输入
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- (vlax-Import-Type-Library
# \( b; O$ L4 H' ~1 b - :tlb-filename (strcat ADO_DLLPath "msado15.dll")% e4 p6 ]3 w2 {9 O
- :methods-prefix"adom-"8 F: a/ W. w2 y* d, i, w
- roperties-prefix "adop-"# T" R+ ?* J% {. u6 e
- :constants-prefix"adok-"
: |: \ m) _- I; x6 \" X - ) @! n! M) e; [0 M
- ;; 找不到时,则通知操作者
$ W# @ t0 `, a, t! t2 c& ^ - (alert (strcat "不能找到以下文件\n" ADO_DLLPath "msado15.dll"))8 t! N3 {+ q9 N( K
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- )
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: B e5 j5 u" M/ T- 生成MS-Access 或 MS-SQL Server 数据库的连接字符串
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- ;;;******************************************************************8 C) G" o6 h. b( [) q6 Y7 b! u
- ;;; 使用ODBC(不需要DSN)连接MS-Access数据库4 ~) f8 }. _& h9 }3 D+ ^& e2 c
- ;;; 示例: (DbConnect_MSAccess1 "d:/dbfiles/products.mdb")
0 e5 G& [- S) z# k( M [ - ;;;******************************************************************* X4 }4 |3 U5 w; S8 f: i2 e
9 C% h2 Z4 v. p$ I- (defun DbConnect_MSAccess1 (dbFile)
, G% ?3 ]; v9 L- v& b - (strcat
) n7 ]# a. z& J4 ~- H - "Provider=MSDASQL;"6 s. `( ~9 t$ _' _
- "Driver={Microsoft Access Driver (*.mdb)};". D. D5 I3 q p) O5 W% z
- "DBQ=" dbFile
- [% d. b& W# [6 y: t- G; q, l - )# I7 e! F$ X/ N/ Q. {
- )8 M# r7 y2 x' t; @/ O6 s1 _
( h6 _5 f) Z- f" z: n: v- ;;;******************************************************************; o1 J( S, N8 i& k& k! M1 a. p
- ;;; 使用JET 3.51连接MS-Access数据库% C8 X' _8 w% [, u
- ;;; 示例: (DbConnect_MSAccess2 "d:/dbfiles/products.mdb")! N& D$ @$ ?& P9 g9 U E, O
- ;;;******************************************************************1 |) u$ ~) _$ ^7 a. p2 y
- ; t( {5 m9 c# @& s }3 C7 m, k
- (defun DbConnect_MSAccess2 (dbFile)- T; T1 Y+ d7 Y$ J
- (strcat
" K4 D* @( Q/ j) j" d' f, x9 E - "Provider=Microsoft.Jet.OLEDB.3.51;"! Q5 ?4 ]$ k P& V# L) f+ _
- "Data Source=" dbFile; ~) ]# B, J/ ?: a6 b$ C
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- ) q+ y' f. }# h' t$ E3 h
5 D+ D" a: N0 `5 r- ;;;******************************************************************
) W' O& m- P8 P! d, ~ - ;;; 使用ODBC(不需要DSN)连接MS-SQL数据库, s( V( l( A4 T* c2 c4 c4 q$ M) G0 D+ N
- ;;; 示例: (DbConnect_MSSQL1 "SQLSERVER1" "products" "sa" "")$ A0 o- r% J. l* w3 p5 P. ~
- ;;;******************************************************************8 L1 X. T) l+ S8 h
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- (defun DbConnect_MSSQL1 (dbServer dbName dbUser dbPassword)" B$ S, ?- ? I) y% T$ [$ g3 ]
- (strcat
* R/ ?: W3 I r+ H4 Y- I& d8 @$ M - "Provider=SQLOLEDB;"( X) {& ]! R0 R2 D0 [/ h
- "Driver={SQL Server};"
o4 m$ a( l$ A6 T! ]; W! L - "Server=" dbServer ";"
9 d2 H- q4 I) i& r7 ]( ]. X) } - "Database=" dbName ";"' u! P9 Q0 J8 A! a3 y+ P; ?, K$ Z' O
- "UID=" dbUser ";"
) T8 u* z! B" ~8 k f$ ^ - "PWD=" dbPassword- j+ I5 |" \) o- j
- )
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- ; x# A0 a ?" D5 |4 ^7 q- @
- ;;;******************************************************************
+ p7 n3 @8 I& G - ;;; 使用ODBC连接MS-SQL数据库w/o6 n5 X) c- Q+ B+ G
- ;;; Ex. (DbConnect_MSSQL2 "SQLSERVER2" "pr_catalog1" "sa" "")
7 R1 Y8 S0 D% q S+ X% n$ d - ;;;******************************************************************! W8 b& [8 v/ t q* O3 l- T
7 k+ N" U o: O% B- (defun DbConnect_MSSQL2 (dbServer dbCatalog dbUser dbPassword)
- q, S* i* f: x1 {3 U6 ?9 \, m - (strcat8 v* A; i5 e& G' ^3 J) K+ Y
- "Provider=SQLOLEDB;"
9 e: c: Q1 d, O9 p# q - "Data Source=" dbServer ";"( r$ k: }& e. P# N
- "Initial Catalog=" dbCatalog ";" d4 `) @8 o9 o/ v5 o
- "User ID=" dbUser ";"
4 o( |' M: s% }8 F ~& T* R - "Password=" dbPassword8 U$ I3 ~ W% u' g
- )
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- - {0 B* T: n# s$ P! _" n" g
- + F$ R9 ^ h" D- `; ]
- 生成适合不同情况的SQL字符串
0 T4 L: {7 l4 f. q5 y% y - (colName和Value可以为'nil或有值。如果Value为REAL、INT或STR,它可以计算到适4 S$ Z9 U; K7 T2 Y
- 当的值中来取得正确的查询语法
% L: z5 x& ~0 F9 X8 v( Y4 w! B
3 I& f( _' }. t( _5 l% z4 G1 Q- (defun DbSQLCommand (tblName colName Value)8 v, L, i; H ?& c
- (cond$ K1 p$ R$ j0 A8 t. j% R0 z( n
- ( (and colName value (= (type value) 'STR))& ^/ t I( M* h+ e
- (strcat "SELECT * FROM " tblName " WHERE " colName " = '" Value "'")
$ P9 k; {! ?7 W$ H; O - )
4 r) i4 q6 ^ j- M' I - ( (and colName value (= (type value) 'INT))3 A C5 z- ^6 i% y4 `' v) v
- (strcat "SELECT * FROM " tblName " WHERE " colName " = " (itoa$ t/ x8 s3 b: R, v i5 ^9 c
- Value) )# X& s0 T' N3 ?; O, E
- )
& _5 Y3 {/ H- D - ( (and colName value (= (type value) 'REAL))
* V# L0 X% O8 H - (strcat "SELECT * FROM " tblName " WHERE " colName " = " (itoa (fix
6 e$ ^% v! h# f' h P. A# s- D - Value)) ); g/ j% S( A- L" `
- )
! P/ `$ ~( t \: A. U( J5 F: T - ( T (strcat "SELECT * FROM " tblName ) )
0 ]: w0 K& e6 D8 `5 g0 y - ); cond+ ?% z; d5 W7 k( g- d
- )
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- 从内存中释放VLA对象" d5 t5 n- L d7 j9 J) I
- 0 v6 s; O) ], c) W8 i6 E
- (defun MxRelease (xObject)
/ c6 ]- d( r# n0 `! N) s2 W0 } - (if (not (vlax-object-release-p xObject))' F/ m+ I7 y. F4 A! R0 y
- (vlax-Release-Object xObject)
, A; C. h" H3 S8 h - )
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c7 `' y" {% W M
; ~: s# _7 L4 i9 a$ ?5 x0 E- 关闭ADO Connection 对象并将内存释放出来( u. H, ]" ?" \0 d8 J$ y
# u$ ~) X6 W) ]4 {4 A6 u- (defun DbCloseConnection (dbConnObject)
. r/ W! ^0 @$ ^ G: W2 t# B - (vlax-Invoke-Method dbConnObject "Close")5 N4 j* S; X+ r d
- (MxRelease dbConnObject)- i4 N3 T, s5 B: R7 j. w9 i! V
- )
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- 关闭ADO RecordSet对象并将内存释放出来
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B$ M2 I; d% \6 Q4 @8 m- (defun DbCloseRecordset (rsObject)' v3 |+ e" K& |2 {9 ]" @0 p% O2 `
- (vlax-Invoke-Method rsObject "Close")
7 ~& i8 K" y# w0 r - (MxRelease rsObject)) Y- K s, S. R5 S
- ): ^ Y& u9 j4 r2 Y* Y- U) d
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- b, O% z& b; Z% n6 i4 s% L V5 y. }
- 布尔测试RecordSet 是否为 Closed (T 或 nil)
# l# F" Z* `1 d1 [
/ @1 s3 u! h/ r8 {# z- ^- (defun DbRsIsClosed (rsObject)
/ | r$ i3 S8 k% n0 Z. j - (= adok-adStateClosed (vlax-Get-Property rsObject "State"))
+ x6 H& F, z. f2 {$ w C, e - )
% I$ e$ o/ f# J) E6 ^ - 4 F1 e/ ]4 S4 M- K' Q" m
" S `$ Z; Y9 t3 c. ^% x( A- 返回一个ADO RecordSet对象中的记录数
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- (defun DbRsCount (rsObject)
* W: ]+ Z# \! H8 V - (vlax-Get-Property rsObject "RecordCount")
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; E, z8 F' M$ g- i- 返回Field对象中给定字段数的字段名称1 l1 D' U0 g: e! I( ]3 G
0 J* \! u8 n K: M F- (defun DbGetFields (fObject fCount / FieldNumber)7 M0 j. q9 P* e
- (setq FieldNumber -1)# |( ^0 J2 N$ [; v8 L
- $ Q7 [& D3 F5 q
- (while (> fCount (setq FieldNumber (1+ FieldNumber)))
; \6 D5 ~9 r0 z) U% p9 P; Z( s+ o, m - (setq FieldList5 F6 U; e n. G9 n
- (cons
- C R$ E8 |! c x7 f+ H - (vlax-Get-Property0 Z3 ]3 c; h& @1 d: @
- (DbRsFieldItem FieldsObject FieldNumber) "Name"
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* {, ]5 w" c, ~) r - FieldList
C: I5 o5 `4 S& k& q - ): X7 u: G( t# w/ T) a! J
- ); setq: Y/ D8 v' O- Y* c
- ); end while0 q* P! s8 v' z& c3 J: s3 c4 ?8 Y
- ); defun
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. V! j( y# E! O# e2 _6 s1 C- 从RecordSet对象返回ADO Field对象
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- (defun DbRsFields (rsObject)8 z6 Z: M+ e% e0 e0 m; [- t( Y& n
- (vlax-Get-Property rsObject "Fields")
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! _7 l1 I! P1 ^; r9 K- / O( p1 P" Y h
- 返回给定Field对象的字段数量
: [. `) z$ @0 T* }# i7 l3 \
3 e: O0 R) L! _6 t- (defun DbRsFieldCount (fObject)
7 J5 i, t; P; I- h; Z7 G9 f - (vlax-Get-Property fObject "Count")
( M, J: g* U2 ^7 V5 f" F5 M - )
0 K. i. T) Q$ h
, H3 I% \5 M8 w0 W0 t7 q' f9 {
' e# b$ P o5 [: i0 n5 G0 v2 V- 获取Field对象的字段名(项)
. M5 b# U' ^5 x1 r8 V8 A3 F, h1 {( H$ U. M. z - ) D m0 T' O6 x7 J! B/ x* J
- (defun DbRsFieldItem (fObject fNumber)
, G# c' _7 T6 A3 t! |9 r: Q2 ] - (vlax-Get-Property fObject "Item" fNumber)
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- 返回RecordSet对象的RowSet对象
# L5 t+ u: m# X4 N3 m, ~$ @8 @- ~: x - & k0 I0 u9 j+ n& O. v1 @
- (defun DbRsGetRows (rsObject)
' t9 T) U* T1 s0 W0 [2 ` - (vlax-Invoke-Method rsObject "GetRows" adok-adGetRowsRest) N+ e/ t# W3 ]6 ]9 r9 a8 |
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: u" ~# _3 s% c0 [1 Q- 应用一个ADO光标类型到给定的RecordSet对象7 @4 y4 j( k3 X- z$ k
& W# P# R4 |1 G! ~" Z/ e8 e* _' B- (defun DbRsCursorType (rsObject curType)
" ?8 M0 G. g, l2 R+ @) J - (cond
( g9 }. X) m- Z' o' E- d( W - ( (= (strcase curType) "KEYSET")
5 e1 c# i0 ^. }8 P; {+ j - (vlax-Put-Property rsObject "CursorType" adok-adOpenKeyset)# [, O+ _6 z$ |4 t, p! \" n# Z) R. c
- )
0 O. @" o- q& ~8 j/ [ - ( (= (strcase curType) "DYNAMIC")
+ D/ b" _* o4 w, O: v - (vlax-Put-Property rsObject "CursorType" adok-adOpenDynamic)7 B; C, A$ T9 c0 b1 v# K
- )
u3 \1 x9 `; ]7 V, P5 x+ @ - )
2 E! t, h) k3 @) Y- s2 v4 I - )
- _7 ~0 F6 E% p7 O1 [3 W/ b - 0 Q2 ^$ y; y9 G
, T! u( l1 h$ W- H- 应用一个ADO LOCK(锁定)类型到给定的RecordSet对象
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- (defun DbRsLockType (rsObject lockType)
5 G/ G+ |/ p" A+ l. n - (cond
: b& _3 ?+ x L* U. ` - ( (= (strcase lockType) "OPTIMISTIC"); r% z. D) R& w0 I, ~
- (vlax-Put-Property rsObject "LockType" adok-adLockOptimistic)
0 \" _7 t% {8 F# m - ). L4 M2 e, G0 e! M6 t8 s! t& q ]
- ( (= (strcase lockType) "BATCHOPTIMISTIC")
9 T2 q3 G) f$ k; V8 y0 b k. R1 { - (vlax-Put-Property rsObject "LockType" adok-adLockBatchOptimistic)
4 p: b0 B( Y6 W' I7 U0 P - )0 h' ]4 f+ u' X9 B+ B
- ( (= (strcase lockType) "READONLY")
* e+ e3 s4 `, w% N8 ^ - (vlax-Put-Property rsObject "LockType" adok-adLockReadOnly)7 A4 C" R+ ~- b6 @
- )
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- )
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x1 s2 L, K9 d- ; f( p: {% h8 `8 M4 y8 V
- 创建并返回ADO Connection对象
" P. a6 L5 H1 z3 v8 p7 A - & j; {8 s5 Y) |' u
- (defun DbConnection (); @& U; l0 p- q/ Y `, A
- (vlax-Create-Object "ADODB.Connection")6 b1 B0 h( x# v! t0 x8 f! D
- )
5 [6 Y) Q8 O( M0 z/ U/ {
1 v; u1 d" ?# ~5 i1 e/ W- M- 3 s1 W5 c+ R Z; |% Z/ o
- 创建并返回ADO RecordSet对象
! y( g. {# j4 W8 d) {; Q2 B) t - |- G' }7 O# ?
- (defun DbRecordSet ()
. q8 T" o3 H: p% z- L3 n9 h! _2 @ - (vlax-Create-Object "ADODB.RecordSet")7 l6 I9 \ v* D( Y! ?
- )
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J2 w( g3 b) {# R- 将所有出错收集到一个点对形式("name" . "value")的列表中的函数
# o0 u1 `$ K" l" \ - ; [+ O( X3 z4 k4 h" k4 X
- (defun ErrorProcessor4 W5 M! n# q5 r( |$ S
- (VLErrorObject ConnectionObject / ErrorsObject
1 x4 E) A( r# s# j6 ?+ B, L7 I - ErrorObject ErrorCount ErrorNumber ErrorList
0 Y0 y, p7 m; T; W4 K8 o - ErrorValue0 f& m: M% c- _/ s
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- 1 H% x' X7 e8 }2 v) z9 ~
- ;; 每一步获取Visual LISP的出错信息& R( I: W+ r. q
- 6 D2 [; J3 w% ~0 B! d' I, i
- (setq ReturnList
% g8 R( `4 y- r0 ?! a - (list
- a) s' C- p& |6 D' i: J - (list& L/ ?& U& y# y% F
- (cons "Visual LISP message"
! P1 c7 H J4 v ]$ h/ D4 F - (vl-Catch-All-Error-Message VLErrorObject)
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" Y+ h: c6 s/ P/ k9 g! j( `$ i: J - ). G6 l5 N, X4 [* o; Q4 J8 d% b
- )( y( J' _* I! ^! Q* S' n/ f
- ;; 获取ADO出错对象及数量) g/ T4 N5 ^: s% c+ q- ~! q7 W: g+ M
1 m! ~2 \8 d! z! u6 v# q# \- ErrorObject(vlax-Create-object "ADODB.Error")" |( [& I; Y% Y# X0 |' G; P* p A# J
- ErrorsObject(vlax-Get-Property ConnectionObject "Errors")
' t$ V0 _, `. [2 I; ]- A6 @ z - ErrorCount (vlax-Get-Property ErrorsObject "Count")* o, X' k, [4 N$ T( n, w
- ErrorNumber -1
5 U: p9 R. r: \8 j - )' V9 u9 X" Z! s) \ i! `; h' y5 i* p
- # D' s2 X) t3 Q* F
- ;; 循环所有ADO错误 ...2 Y5 A2 F7 W3 ]4 {9 C2 }6 o
- (while (< (setq ErrorNumber (1+ ErrorNumber)) ErrorCount)1 y$ D0 {( U; h M* b% i U
- . R7 l6 ]8 t+ W! J
- ;; 获取当前出错的出错对象' V2 L- W- [2 q4 J1 }: w
- (setq ErrorObject (vlax-Get-Property ErrorsObject "Item"
/ a/ J5 q' S$ p) e$ c) U# j# z - ErrorNumber), B9 l' b# K4 T/ B' `2 {
- ErrorList nil ;; 清除该出错的列表项
5 `+ V, S1 U+ H8 S( S9 u4 o% Z - )& \6 ]! J: s6 L0 {. v
9 w! w, H# u+ f. Y- ;; 循环该出错的所有可能的出错项: w7 a0 l9 j* P/ h6 f, P# v4 b
- (foreach ErrorProperty0 ^6 t; f! C2 e: w( G
- '("Description" "HelpContext" "HelpFile"3 F/ w* p8 E' y8 h q" b2 ?% [2 Z
- "NativeError" "Number" "SQLState" "Source"1 B1 ]0 l/ \* i h( B- p, B; T1 w6 W+ n
- )6 b4 U' b( w, z" [
- ;; 获取当前项的值。如果为数字 ...! [* L4 Q7 Q) e, H# E4 k
- (if0 u+ w$ I' b5 m8 l3 K2 @/ _
- (numberp
# A5 d, L/ G; l2 m/ I* e - (setq ErrorValue" a, w: q+ H" M/ j) }
- (vlax-Get-Property ErrorObject ErrorProperty). z4 o* t- U K/ c+ F* X& s$ X
- )): U) }! \ M: p* [& U& w1 O, S
- ;; 则将其转换为字符串以便与其它一致7 Y0 j( t H& C( c: m
- (setq ErrorValue (itoa ErrorValue)) d1 q* i, x2 @* p B* t5 u I; d M2 x
- )
% v% l$ ?: E) x( }! X4 C2 U- _$ Z: c - ;; 同时保存起来! }4 x% n5 c( H% @
- (setq ErrorList (cons (cons ErrorProperty ErrorValue) ErrorList))) G( W- D0 y. }. o/ _/ u* G
- ); end foreach
: a# F; E( X4 p) a - / S9 H* Q$ q) p8 \- {7 u' m
- ;; 添加当前出错列表到返回值中+ B$ h$ A6 _1 i5 j: l
- (setq ReturnList (cons (reverse ErrorList) ReturnList))8 _ g. _9 {( b9 U, V; s. o
- ); end while
3 x5 M- n$ D0 N4 z
7 E$ a$ i, x7 v- ;; 将返回值设置为正确的顺序' x S( _8 V ]& {; \# K- ^/ R3 D$ S
- (reverse ReturnList)* [) R8 T# A" r* r1 S+ D ~2 W" s
- 3 m6 d/ V( g% a1 k6 T/ Q
- ); defun
6 \- @( t3 y1 V0 f# N - 9 B6 a& S+ L: c% |2 R+ t. ]" w7 M
8 C' ^/ G7 V8 D+ R9 p( n9 I* l% J- 显示由ErrorProcessor函数生成的出错列表的函数。该函数与ErrorProcessor函数分开是" u4 Z5 M# q% y8 M5 }
- 为了ErrorProcessor函数可以在DCL对话框显示时被调用,然后ErrorPrinter可以在对话
- G8 l, d8 B5 l5 W. U; G7 e - 框结束后被调用。, w) u; M k+ W/ r5 Z' @9 }: I
- , R# z8 p/ `/ v8 u
- (defun ErrorPrinter (ErrorsList)6 f4 ?& E, o% F' H: [: w$ g1 s
- (foreach ErrorList ErrorsList" `1 w ^! N1 a1 A$ b! p6 j
- (prompt "\n")
/ T" }* m( f; Y. b) X# D, R - (foreach ErrorItem ErrorList4 s" ]% a" i' e; E; X, z+ K% H
- (prompt (strcat (car ErrorItem) "\t\t" (cdr ErrorItem) "\n") )
# H, x1 G6 V5 G# j+ ?0 c! \ - )
. Z$ M. c- G7 G0 [' ~9 G6 m6 }- A - )! [/ a; W& r3 x8 p2 T4 z4 r
- (prin1)
: N! b7 h, ^5 D. m& z) v& J - )/ K. h: r1 q" M6 i6 |( B3 D- u+ R% s
- . A/ [; _4 R3 ?( i8 C2 [6 ^
: D+ i) J" y. e) D; z: A7 L- 以下为使用ADO的完整例子:% S* Q/ A, ?; V# H2 I
- 4 ?0 V) H: D4 q& ^( `
- ;;;******************************************************************' F* _# e8 H% V. p6 e) `+ d$ b* F
- ;;; 从Access数据库文件(dbFile)的表(tblName)中清理掉列(colName)值为给定的
# @/ |/ Q! o' ~& I - ;;; (value)值的表记录
' i( j. e3 b+ C4 e - ;;;******************************************************************/ |/ U; _$ ~: {3 O
9 g0 R7 P! Z) [( o- (defun DbTableDump3 `8 p* F" a1 `% S/ L! P
- (dbFile tblName colName value / SQLStatement ConnectString)
7 J' [2 H( q. T& T" q- c
( `! g* Q5 h7 }2 }5 i0 k* [( \- (setq ConnectString (DbConnect_MSAccess1 dbFile)! v/ T, Z% \' R; x* _% P& l
- SQLStatement (DbSQLCommand tblName colName value)
# A" h- O+ |' X. {* s - ); setq# U- t) T ]( Z+ N8 H/ G
- (DbQuery ConnectString SQLStatement)
9 A4 n: a, _9 s8 t2 Y) s- ? - ); defun* ?/ q# v( c5 k
- / w: h8 Y6 N+ g7 p- c
- ;;;******************************************************************
7 q8 B) o$ F$ A - ;;;ADO 示例程序
; v3 E; z: L0 G$ O$ F. t - ;;;******************************************************************' I( A- ]" W: U5 w; `6 H
- ;;; Connects 使用了公用变量ConnectString所指定的连接字符串,而SQL语句为公用; l- L& F- R7 e) ?# J K0 w0 ?
- ;;; 变量SQLStatement。
, C7 V5 r. }8 W! C. v - ;;;6 I9 r9 p4 V& O2 n
- ;;; 返回值:
w: x' p2 X. Q) G5 ? - ;;;
; T2 t' `( _' c3 R- t. { - ;;; 如果出现任何错误,则返回NIL。* n8 F, A. h$ ?4 n# h" ^. y T
- ;;;5 [4 k; P- y2 A% c x7 Q" U9 ?
- ;;; 如果SQL语句为"select ..."语句则可返回行、返回一个列表的列表。第一个子列表
O# i3 D, @$ B1 k9 o( t1 Z. @ - ;;; 为列名称的列表。如果返回值中包含有行数据,则随后的子列表包含了与第一子列表中6 }5 z" H5 {2 ?/ O u% {9 i
- ;;; 列名称顺序相同的子列表。8 B6 I' R, ^* \0 n1 i3 v+ i
- ;;;
$ q, B& A$ G9 _: ~9 n/ y6 M2 x" b - ;;; 如果SQL语句为"delete ..."、"update ..."或"insert ..."则不能返回任何行,. f& p+ Q$ p' b F1 C: Z3 ^* o
- ;;; 它将返回T。作者想让它返回所操作的行号,但到目前为止还找不到方法。
( B9 T1 D8 l v0 M& C - ;;;******************************************************************( [* b" _5 R2 E2 u9 R4 R
' n7 n U4 j; h! u5 S) y- (defun DbQuery
# o1 O- X% g2 h/ O - (ConnectString SQLStatement# F) T* b3 O$ t& [
- / ConnectionObject RecordSetObject FieldsObject FieldNumber5 i% i3 q; k- u7 V& [
- FieldCount FieldList RecordsAffected TempObject ReturnValue, c8 q, D# [6 g) J4 z
- )
8 y+ w2 g6 u4 n" {4 T0 { Z
- T& g' @# K& B4 W# V& c- ;; 创建ADO连接对象1 ~6 Q. y$ ]: N$ Z$ k
- ! `4 G4 Z$ y R/ z) ~
- (setq ConnectionObject (DbConnection))
! W0 S4 R) H/ d; L( f( Y
. y# x' J8 k: r, V( O- ;; 试图打开连接,如果出错 .... R4 V- C# V) _
- 5 y+ X' j3 }# ~
- (if (vl-Catch-All-Error-p
' g5 t3 h3 G# C9 Y; J, B# I1 \5 _ { - (setq TempObject
3 [' q3 a2 G& Y, ^ \ - (vl-Catch-All-Apply
+ h# M# y, {/ D/ B - 'vlax-Invoke-Method
4 h& Q8 _! Q& \
1 C0 ^- M( _) D# a- ;; 如果在ConnectString中已经包含了"admin"用户ID和""密码,则这; ]; u; c# O1 i2 p! B7 i7 [ n7 Y
- ;; 两个参数可以不需要。
, W& @6 b2 _. W/ f" l
' D3 j9 O6 D6 b0 P/ g1 K. o- (list
$ a2 P5 v3 m& ^% \6 B& Q; F; O - ConnectionObject
7 B8 A; z2 w4 d& E - "Open"# k2 K% h$ h- r7 d/ W: L
- ConnectString" |% S+ a9 B7 m
- "admin" ""
' E: ]8 U% f- n" W- g. ~ - adok-adConnectUnspecified
* }; X$ {8 M- d& Y X - )
( g2 `6 n* o; N2 _8 M3 N" ~ - ); vl-Catch-All-Apply8 u/ M1 K5 l# c- ^( z6 b
- ); setq: \2 N* e& g$ u
- ); vl-Catch-All-Error-p. F) Y& r3 ~4 }1 a- r
- " u/ {& d Z! O
- ;; 则显示出错信息
7 C: J- ?2 [& i4 b) c/ j5 u
! c. S7 |* @, o8 e# `& k4 H- (ErrorPrinter (ErrorProcessor TempObject ConnectionObject))+ N: V% Z, `8 O. t1 C1 e" K
- . P" r+ H$ ~- z) C V
- ;; 打开连接开始处理 ...1 ?* ^ _, ?! o
2 s; ]. f A* Y- (progn" B) p: r5 O0 Q! ?: f
3 l5 J5 N" }8 d' u- ;; 创建ADO Recordset并设置光标和锁定类型
: K4 g. I8 u% A$ Z4 p# B - ) t8 f: W9 Z8 p# h+ B8 U
- (setq RecordSetObject (DbRecordSet))2 j m. t. h$ D1 W
- (DbRsCursorType RecordSetObject "keyset")
- J/ R5 U" W) Q - (DbRsLockType RecordSetObject "optimistic"): ]& i! c! u, }* T
- 1 J, t5 C# c3 g' }. D
- ;; 打开recordset如果出错 ...
1 h; }' Z/ ^/ k- Z
~. [! k7 Y3 j" T! ~' X- (if (vl-Catch-All-Error-p
1 I) d& T8 i8 |4 |" a) I r C& r5 d& O - (setq TempObject: o' D6 K: {6 H3 a+ D8 f) L4 ~
- (vl-Catch-All-Apply
) c" g0 S& e5 { - 'vlax-Invoke-Method9 R1 D N% Y9 b1 ?' m( J" z, I
- (list RecordSetObject "Open" SQLStatement
" Y) B1 l/ }* X5 G5 M - ConnectionObject nil nil adok-adCmdText1 V0 Q3 M( J" A3 _8 y7 C; ]
- ), D& i' V" T5 [5 b0 [
- ), U( u l2 ~/ ~
- )2 f8 @( l3 Z$ t" [0 U+ R0 w
- )6 e+ @$ W! {! P) f* l. }8 h
- ;; 则显示出错信息
0 J! j0 {5 y' N! l2 K: X4 P f7 U - (progn' \% R* e: ~3 y# i# _" @, a% a
- (ErrorPrinter (ErrorProcessor TempObject ConnectionObject))1 U5 s. J2 W3 c( j
- )6 r$ y4 Y& ~, N2 T
/ }) |+ }* Q$ g- A2 x) B- ;; 没有出错。如果recordset被关闭 ...
3 ~4 ]5 W- s5 l+ n! G
4 ^5 f0 W% {8 j; m6 U1 z6 t- (if (DbRsIsClosed RecordSetObject)! Y. F4 m. }) v- b& I( y1 y
- - B. r7 p% S/ l) P7 `5 o0 r
- ;; 则SQL语句为"delete ..."或"insert ..."或"update ...",
$ D3 o! [; x5 U% k0 s! I - ;; 因为它没返回任何行。这里最好能返回操作过的行号,但作者还不知道6 ^: X! B( ^' M
- ;; 怎样写。现在只有把返回值设为T来表示已经处理了。# I- _/ U( F) f; q5 C
- ' s: }" J7 y9 t0 W0 [
- (progn
3 c- P; j* g: X' j - (setq ReturnValue T)
' d, Z3 p% R" O7 V - , v C% U1 N" U3 y c1 z- a
- ;; 同时关闭recordset,这时已完成。+ U, I" S( ]' w% D4 ~8 K4 _; a# Z
- (MxRelease RecordSetObject)
: Q5 G5 e; S( n$ s# b8 W - )
/ { y* X- z: u# E9 Q$ d" s; u
9 D/ G: i; G( o5 M6 f s- ;; recordset打开,SQL 语句为"select ..."。
' @% C, Q2 P. x5 Q9 ]
& Y2 B! y' m% W0 u, I- (progn
; Q9 N8 m/ q5 L7 `! O3 m
0 L" B/ g( v) O- ;; 获取Fields集合,它包含选定列的名称和属性。& l# c2 L/ h4 l; |- A
- 4 r) \5 w8 X, L* M$ _) _
- (setq FieldsObject (DbRsFields RecordSetObject) ;; 将字段作为对象
/ e: s4 ?6 _* { e7 t: @ - FieldCount (DbRsFieldCount FieldsObject) ;; 取得列的数量" z# S9 }: I6 E( M* N8 \
- FieldList(DbGetFields FieldsObject FieldCount);; 取得列表中所有列的名称
6 z+ |% j. X& d, @" ]/ s - ReturnValue (list (reverse FieldList))
2 o1 W4 z6 h2 K) S$ l - ); setq' }' n8 `2 L3 X/ ~( F
1 L2 Z) O1 ?+ M, ^- ;; 如果找到任何行 ...
3 _8 L) K! _% l' G- e8 Q6 G6 n - 6 s; y1 Y0 L5 f) J/ l
- (if (< 0 (DbRsCount RecordSetObject))
3 ]7 P0 c, \; Y. @/ u
5 A' R: R7 B, X5 [9 |- ;; 我们来处理最棘手的问题!创建最后结果的列表 ...1 K/ Y$ v* U, z, b
- , B$ O9 O7 ~/ p& s* P5 l# R
- (setq$ a/ W* p3 r+ Z, d( n9 s& P
- ReturnValue
O3 q! Z6 a1 w+ H
) l8 q3 ]# I, m# c6 [& w( W- ;; 添加行列表到字段列表中。
4 U" n" S) h1 p4 b1 k8 w2 _ - 9 X' D, Z4 X+ G# J) g4 u) L
- (append (list (reverse FieldList))' w v, | O. U$ m" V6 O7 T
) p4 e6 y1 o4 w& u- ;; 使用了Douglas Wilson一流的列表转换代码
- B% ^1 B" D: h1 n! ]* Q - ;; 来创建行列表,因为GetRows返回的项为列顺序7 c. Y9 k# ~- S6 c
* F( b( w& g9 Z, O* R- (apply 'mapcar
& E3 }# e9 Z8 p5 P, X: o - (cons& J+ F. Q. {+ ^4 |5 x% H5 W
- 'list% B9 q* d) d K3 z
- 4 t( g4 U$ X3 [4 q
- ;; 设置转换变体列表的列表到AutoLISP标准
6 t9 r( \* }, \' y/ t - ;; 的项目列表的列表。5 A* J/ J6 I' m8 ^" w
2 Q6 w3 p1 k* o* y; G- (mapcar4 v$ ?2 h- f4 j$ F4 _
- '(lambda (InputList)
: T9 E8 `3 P$ E - (mapcar '(lambda (Item)
/ G, |0 w" Z: v' b" } - (DBL_variant-value Item)% ?6 R$ R/ T+ J, b# D' L: m
- )& ~& u' T+ {8 O
- InputList
# ]: ]# h/ E% Q2 @7 Y; O - )% n/ |4 `% n7 r9 [7 a* k5 q
- )6 E( V; M7 \7 f% H0 l' t l$ X1 Z
- ;; 取得行,将其从变体转换安全数组再到列表
: P" \+ R/ G0 x" J; s
2 n* y ^# x& D) G9 c7 M- (setq t2 (vlax-SafeArray->list
- Q# M7 Q. h$ [/ @6 m# r - (vlax-Variant-Value% X- ?% g7 S8 L# o5 c3 X9 w
- (DbRsGetRows RecordSetObject) Y: b. ?9 J# d: y( \& P# Y/ n0 d
- )8 i) k5 S4 B/ |9 ~9 F! O
- )
' j$ y( ]. D0 f) m9 _" r2 ^ - ); setq H: I' q5 z; q6 ]" d7 ~
- ); mapcar% m* B; E8 d* l0 N5 u/ M/ e
- ); cons! O1 q3 r$ I/ |0 N1 V
- ); apply
0 _* P U. T9 R7 Z" G. w4 i - ); append
. j; l& n' f; F+ k+ j( ?+ N - ); setq$ Q7 e6 @) h% b$ `9 J& _( i
- ); endif- J. H+ \) a! M
: Y% y% Z6 I1 w1 M5 _# c- ;; 关闭recordset0 L: U7 u5 F7 ^
- (DbCloseRecordset RecordSetObject) J0 Q( B; p! [" S: Z
- 1 J0 a" g6 @2 O9 Z3 s
- ); progn
2 U7 x" _5 o) f. K& b9 z* M5 i8 o - ); endif, P: ~! @; z$ X; a' K2 Q+ ]
- ); endif' \' O0 O) s1 W" l |! J6 U
- ) P5 g! L. F- J0 {; l3 o
- ;; 关闭connection
! n2 Q+ T8 l8 o - (DbCloseConnection ConnectionObject)
* Z M$ u, [) b* N& X+ _
0 H' x8 [. }3 ?- ); progn) x, ?1 G' `+ T5 J: T8 I
- ); endif
5 {" f# X* J5 i8 J4 e - : n2 R* n# Y V: r0 W) i
- ;; 返回值9 H8 b; w% C) j1 y! o
- ReturnValue y' m; D/ ~ T( @5 ?* B) x" _
& g% ~7 U" U! p9 x7 C q4 ?- ); defun
复制代码 |