谈谈UG的external模式

stephen zhang

有人问我ug的external模式.
这是UG二次开发不需要UG界面时使用的一种模式。UG Open只开放了部分的API提供支持。
! J$ z! s" h! M  Linternal模式是UG的插件方式调用。
所以，即使是external模式也不能够脱离UG运行。
" H% \) v% b- g/ v  v以前，使用C/C++开发时，internal的程序是dll，而external的程序是exe。
采用.net语言，internal也可以写成exe。
: X2 v& \4 o- i5 l. J3 minternal使用的是UG规定的入口函数，比如Main、Starup
external只有一个入口函数Main
虽然UG两种开发模式都使用同一套API，但是支持与否要看说明。
比如
5 y1 @% k8 I& Z' Z" D" @UF_PART_open (view source)
  b7 H, L' v1 C/ g
Defined in: uf_part.h
& h1 N2 x4 k+ O+ g* |
) x6 E+ e6 R7 R- Y! v2 a  lOverview
! ~7 v& ]# r7 |' }) O; WRetrieves an existing NX part or Solid Edge part into the session and
+ H* e% O0 e( P/ [1 Wmakes it the work and display part. Solid Edge parts (.par, .psm, .pwd or .asm
file extension) are opened by extracting the Parasolids data from the Solid
4 m" L; ?* C/ T2 q1 b: Z$ I, pEdge part and then importing this data into a new NX part
with a .prt extension. The file name of the new NX part has the Solid
Edge part name and a ".prt" file extension. If there is an existing NX
: n& _2 a9 p8 y$ kpart with the same name as the Solid Edge part, then this function
returns an error.
- R% [: w# \, \' RThe NX part file that you create by opening a Solid Edge part
file contains one or more unparameterized solid bodies.
, L& O" _/ q' k# }1 R, cOther files can be opened with this call. The following
extensions are valid - .udf, .bkm, .xpk and .jt. Foreign files with the
* I" u  k* r2 w' Q, P0 gfollowing extensions can also be opened with UF_PART_open - .igs, .stp,
.dxf, .dwg and .model.
If a part is a read-only part, and the part retrieval modifies the part,
you will receive the error code UF_PART_err_read_only_modified, for that
: r4 Z1 ?5 C, qpart when you call UF_PART_open. In this case UF_PART_open will not
3 ]# J. A, `0 @7 f7 qreturn a zero status.
. @( ~3 ^6 B. x* p( ]% P% g- m# t( z8 W
5 @1 i( P/ j# t1 }Environment
7 L, T; |, C3 z3 [Internal and External
==========================
UF_DISP_create_image (view source)

/ N1 H3 T$ j3 I2 v/ j( eDefined in: uf_disp_ugopenint.h

: Y; G/ U/ f' f; x/ H5 M8 E& vOverview
Export a PNG/JPEG/TIFF/GIF/XWD/BMP full window area image
Creates an image file with the file type you specify using the image
currently displayed in the graphics window.
1 c& Z3 u% L+ {
9 v8 \. a" q. Y$ l- ?Return
Return code:
= 0 No error
= not 0 Error code, including:
9 ]- E6 w- f" d' U+ P! d3 g7 C0 rUF_DISP_err_failed_to_create_image_file
% c: F+ i' ?6 T) Z3 [. @3 LStandard UF error codes
+ y3 p; D& ~2 f9 P0 `9 P% A
8 l: y( I. s6 _8 ^  T3 {( }Environment
9 L$ K0 X; e6 @5 eInternal
UF_DISP_create_image (view source)

Defined in: uf_disp_ugopenint.h
/ k3 f) A9 j# g# T, J$ }
9 t$ h. ~) G/ gOverview
$ P$ f! n0 A- a6 B3 XExport a PNG/JPEG/TIFF/GIF/XWD/BMP full window area image
0 g( b: X3 c) Q3 N, T3 |6 jCreates an image file with the file type you specify using the image
currently displayed in the graphics window.

Return
Return code:
/ m2 v3 @- ?5 P% J, L/ [; V% W0 k3 F+ z= 0 No error
= not 0 Error code, including:
, I; x9 g& X3 T- k/ ^/ u9 LUF_DISP_err_failed_to_create_image_file
Standard UF error codes

Environment
% ?3 x6 C/ T; u; K# c& fInternal
另外，如果要运行external模式，需要把UGII目录加入到Windows的Path路径下，否则运行时找不到dll
) E( l8 T6 \) s$ h8 V' L6 m$ Q这是用.net做的external程序示例
view plaincopy to clipboardprint?
1 P5 p0 q- {# @2 x9 {try  
        {   
/ H" j; [1 k% D            Session theSession = Session.GetSession();   
( J6 t9 h8 w! j- d4 \( {            Console.WriteLine("OK");   
+ L/ [( g! J; j- @6 |) t. [: H  
            Part thePart = theSession.Parts.NewDisplay(@"E:\UGNX6\test.prt", Part.Units.Millimeters);   
            PartSaveStatus ps = thePart.Save(NXOpen.BasePart.SaveComponents.True, NXOpen.BasePart.CloseAfterSave.True);   
  
# e# B. T0 {* j/ f9 `. p& b            Console.WriteLine(ps.ToString());   
6 V" _2 I+ D% S5 o4 {4 h        }   
        catch (NXOpen.NXException ex)   
5 w  U$ L, B- n6 I: b. x! {6 b1 e        {   
            Console.WriteLine(ex.ToString());   
        }

matilian11

请问可否传个外部开发的实例
谢谢

achuan

太深奥了。。。