最近开始看CAD的二次开发……但是实践的时候遇到一个问题，每次出现ThisDrawing都会出错+ ]3 @* b, g, m) }
Name 'ThisDrawing' is not declared.
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" P: C4 b* \. f0 B' d' H! [7 Q4 G" |下面是在网上原样copy的教学程序，可是却在所有的thisdrawing处出错，各位大侠帮忙解决一下吧……many thx……
4 }* |$ M+ R- Y+ |# Q' A' L- c因为我是菜鸟，可能里面有一些非常弱智的问题……大家见笑了 c- l) J5 m5 {/ A
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Imports AutoCAD
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Public Class Form1
1 g1 ], o% {- D7 S, z- D Sub Ch2_ConnectToAcad()6 G% c4 T9 h4 c
Dim acadApp As AcadApplication- p, c% j8 k- o; \) j* Z
On Error Resume Next
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7 J$ Y7 \. R+ O) @4 E acadApp = GetObject(, "AutoCAD.Application")
6 F Y7 D; U3 D" I If Err.Number Then
" \/ _) u b2 _ Err.Clear()+ x$ F# g9 J% J+ K' H w
acadApp = CreateObject("AutoCAD.Application")
8 k, h0 A3 F/ K If Err.Number Then8 E s- a1 S! G; } g4 |7 D! H
MsgBox(Err.Description)5 r+ v9 D6 K" S! C4 A/ E2 J4 z
Exit Sub
- F' S+ Z/ ?7 u, ` End If
( @ F+ P' X% ~( x! I' H& {9 V* F End If
6 H6 d z' C$ l, V- w2 d0 J2 h7 z MsgBox("Now running " + acadApp.Name + _- a) h, ]* [1 z1 n
" version " + acadApp.Version)
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End Sub
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8 P; i' k( R# V! j6 w1 J/ w! @ Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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8 L! G. T2 O6 f) }, I% H End Sub* r( t' D' ~2 z/ W
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) \) Y% j: B a* ^ Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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Dim Arc As AutoCAD.AcadArc
: U. j; E4 z: j* I' C Dim Pnt As Object
; H( _8 A$ }: Z" w2 u Err.Clear()
/ m" r v5 W" J7 P7 |5 K On Error Resume Next
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'选择圆弧" P7 |+ j/ v. G2 ^! C
ThisDrawing.Utility.GetEntity(Arc, Pnt, "请选择圆弧：")
% n7 _: k1 B6 G/ h0 W9 N% f8 J If Err.Number <> 13 And Err.Number <> 0 Then Exit Sub
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5 Z% \% o0 ^ N Do Until Arc.ObjectName = "AcDbArc"
M. t P3 w: U8 T Err.Clear()
3 b4 ?# W; U+ V( Y$ N ThisDrawing.Utility.GetEntity(Arc, Pnt, "你所选的不是圆弧，请重新选择圆弧：")
+ ? M. J$ J! [5 T If Err.Number <> 13 And Err.Number <> 0 Then Exit Sub" S2 _+ i D$ r7 m
Loop% c' F; p5 o8 \6 C
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'获取圆弧各属性
7 \/ l# i+ z3 U) q7 k6 u9 \6 V Dim Leng As Double
, i+ E+ l! U+ c Dim SPnt As Object5 | }, y; \! ~. [5 S
Dim EPnt As Object) j# l- l2 d* u; K
Dim CPnt As Object7 ?" w& G7 g% I# i. w9 m
Leng = Arc.ArcLength
9 U- l s) E8 {9 Q SPnt = Arc.StartPoint
9 H% V7 `% \& z: y1 r3 Z EPnt = Arc.EndPoint
; x' I5 t5 O, Q1 g2 f* ] CPnt = Arc.Center
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6 U* J0 t4 |1 t '选择标注点" W1 M/ V3 c* Y( o8 _' N3 q
Dim PntforDim As Object5 ?/ U3 m! ~# f8 E h
PntforDim = ThisDrawing.Utility.GetPoint(, "选择标注点位置：")- p- R$ y9 q0 D+ h* k/ _: w" x
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'对圆弧进行角度标注
; c- w0 F# j) I2 a& J' w. o Dim DimAng As AutoCAD.AcadDim3PointAngular
/ G* r7 `% b! j DimAng = ThisDrawing.ModelSpace.AddDim3PointAngular(CPnt, SPnt, EPnt, PntforDim)- R: F6 j+ i \! h E
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'获取角度标注的精度控制(小数点位)
A6 a4 ?0 Y/ @! \3 Y Dim FormatDot As Integer
! [1 ]# q- s3 W" S% { Dim FormatTxt As String
m' y+ A W, V; j$ c! N& f g FormatDot = DimAng.TextPrecision& H: l& K6 Z# I) K0 p! i* y
'转换为精度控制格式
0 o; s( N" h/ ~% N2 H m% n& G FormatTxt = "0."
$ i- O( c* A, k8 @9 X0 E Dim I As Integer
- [: F t4 ^/ t( D' m+ o For I = 0 To FormatDot
A9 s# t2 m6 F& n; ~2 |! d5 f+ ` If I > 0 Then8 N0 k0 \0 d4 V" N) x, G9 d
FormatTxt = FormatTxt & "0"
8 l V U& P) |, a& a i End If
7 d+ f! v9 {/ d; q' l6 A" v* i Next
. O; ]# q% v3 y% P! k: v2 { '更改角度标注的文字内容. S) c5 N" x+ O# i1 Y
DimAng.TextOverride = Format(Leng, FormatTxt)
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End Sub
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End Class |
发表于 2007-6-10 16:16
楼主
哈哈 
