用C#实现外部调用CAD绘图一例-CAD Automation_c#windows窗体快速调用cad绘图-优快云博客

本文介绍了一个由印度开发者编写的C#代码示例，展示了如何通过外部调用CAD程序，包括创建文档、绘制线、文字、圆等功能，并提供了自定义类和函数以简化操作。

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说明：
　　一个老外（好像是印度人）写的例子，实现外部程序调用CAD程序，代码中加入了自定义了的类——PF (PublicFunctions)，类中包含了几个很实用的函数，如CreateAutoCADObject()可以创建打开一个新的AutoCAD文档，还有绘制线（Line）、文字(Text)和圆(Circel)等函数。注释不多，但仔细研究一下还是对自己很有帮助的。

代码下载：本地| CodeProject

PF类代码示例：

using System; using System.Collections.Generic; using System.Text; using System.Diagnostics; using System.Windows.Forms; using AutoCAD; namespace CADAutomation { public static class PF { public static AcadApplication gbl_app; public static AcadDocument gbl_doc; public static AcadModelSpaceClass gbl_modSpace; public static AcadAcCmColor gbl_color; public static double gbl_pi = 3.14159; //Layer For Donuts public static AcadLayer TerminalsLayer; public static AcadLayer SwitchLayer; //Layer Termination Points public static AcadLayer TerminationPoints; #region PublicFunctions public static void CloseAllInstance() { Process[] aCAD = Process.GetProcessesByName("acad"); foreach (Process aCADPro in aCAD) { aCADPro.CloseMainWindow(); } } public static void CreateAutoCADObject() { try { CloseAllInstance(); gbl_app = new AcadApplication(); gbl_doc = gbl_app.ActiveDocument; gbl_app.Application.Visible = true; gbl_modSpace = (AcadModelSpaceClass)gbl_doc.ModelSpace; gbl_doc.Linetypes.Load("HIDDEN", "acad.lin"); gbl_doc.Linetypes.Load("CENTER", "acad.lin"); //Other Objects Layer SwitchLayer = PF.gbl_doc.Layers.Add("Switch110Layer"); SwitchLayer.color = AutoCAD.AcColor.acGreen; PF.gbl_doc.ActiveLayer = SwitchLayer; //Layer For Donuts TerminalsLayer = PF.gbl_doc.Layers.Add("TerminalsLayer"); TerminalsLayer.color = AutoCAD.AcColor.acRed; //Layer Termination Points TerminationPoints = PF.gbl_doc.Layers.Add("TerminationPoints"); TerminationPoints.color = AutoCAD.AcColor.acWhite; } catch (Exception ex) { MessageBox.Show(ex.Message); } } public static void DrawLine(double StartX1, double StartY1, double EndX2, double EndY2, string LineType, bool DrawDonutsOnLineStart, bool DrawDonutsOnLineEnds) { AcadLine lineObj; double[] startPoint = new double[3]; double[] endPoint = new double[3]; ; startPoint[0] = StartX1; startPoint[1] = StartY1; startPoint[2] = 0.0; endPoint[0] = EndX2; endPoint[1] = EndY2; endPoint[2] = 0.01; lineObj = gbl_doc.ModelSpace.AddLine(startPoint, endPoint); if (LineType.Length > 0) { lineObj.Linetype = LineType; //'"HIDDEN" lineObj.LinetypeScale = 10; lineObj.Update(); } if (DrawDonutsOnLineStart == true) { DrawDonut((AcadBlock)gbl_doc.ModelSpace, 0, 3.0, StartX1, StartY1); } if (DrawDonutsOnLineEnds == true) { DrawDonut((AcadBlock)gbl_doc.ModelSpace, 0, 3.0, EndX2, EndY2); } gbl_app.ZoomAll(); } public static void DrawLine(double StartX1, double StartY1, double EndX2, double EndY2) { DrawLine(StartX1, StartY1, EndX2, EndY2, "", false, false); } public static void DrawLine(double StartX1, double StartY1, double EndX2, double EndY2, string LineType) { DrawLine(StartX1, StartY1, EndX2, EndY2, LineType, false, false); } public static void DrawLine(double StartX1, double StartY1, double EndX2, double EndY2, string LineType, bool DrawDonutsOnLineStart) { DrawLine(StartX1, StartY1, EndX2, EndY2, LineType, DrawDonutsOnLineStart, false); } public static AcadLWPolyline DrawDonut(AcadBlock space, double inRad, double outRad, double cenPt1, double cenPt2) { double width, radius, PI; double[] tmp = new double[2]; double[] v = new double[4]; AcadLWPolyline pl; double[] basePnt = new double[3]; try { //Switch to terminals layer gbl_doc.ActiveLayer = TerminalsLayer; basePnt[0] = cenPt1; basePnt[1] = cenPt2; basePnt[2] = 0.0; PI = Math.Atan(1) * 4; width = (outRad - inRad) / 2; radius = (inRad + width) / 2; tmp = (double[])gbl_doc.Utility.PolarPoint(basePnt, PI, radius); v[0] = tmp[0]; v[1] = tmp[1]; tmp = (double[])gbl_doc.Utility.PolarPoint(basePnt, 0, radius); v[2] = tmp[0]; v[3] = tmp[1]; pl = space.AddLightWeightPolyline(v); pl.Closed = true; pl.SetWidth(0, width, width); pl.SetBulge(0, -1); pl.SetWidth(1, width, width); pl.SetBulge(1, -1); //Switch to other layer gbl_doc.ActiveLayer = SwitchLayer; return pl; } catch (Exception ex) { MessageBox.Show(ex.Message); return null; } } public static void DrawSolid(double StartingXPoint, double StartingYPoint, double Length, double Width) { AcadSolid solidObj; double[] point1 = new double[3]; double[] point2 = new double[3]; double[] point3 = new double[3]; double[] point4 = new double[3]; //Solid Starts point1[0] = StartingXPoint; point1[1] = StartingYPoint; point1[2] = 0.0; point2[0] = StartingXPoint; point2[1] = (StartingYPoint) - Width; point2[2] = 0.0; point3[0] = StartingXPoint + Length; point3[1] = StartingYPoint; point3[2] = 0.0; point4[0] = StartingXPoint + Length; point4[1] = (StartingYPoint) - Width; point4[2] = 0.0; solidObj = gbl_doc.ModelSpace.AddSolid(point1, point2, point3, point4); //Solid ENDS } public static void DrawText(double StartingXPoint, double StartingYPoint, string textString, double Height, double Rotation) { AcadText textObj; double[] insertionPoint = new double[3]; insertionPoint[0] = StartingXPoint; insertionPoint[1] = StartingYPoint; insertionPoint[2] = 0.0; textObj = gbl_doc.ModelSpace.AddText(textString, insertionPoint, Height); textObj.Alignment = AcAlignment.acAlignmentLeft; textObj.Backward = false; textObj.Rotation = Rotation; } public static void DrawText(double StartingXPoint, double StartingYPoint, string textString) { DrawText(StartingXPoint, StartingYPoint, textString, 3, 0); } public static void AddText(double StartingXPoint, double StartingYPoint, string textString, double Height) { DrawText(StartingXPoint, StartingYPoint, textString, Height, 0); } public static void DrawCircle(double StartingXPoint, double StartingYPoint, double Radius) { AcadCircle circleObj; double[] centerPoint = new double[3]; centerPoint[0] = StartingXPoint; centerPoint[1] = StartingYPoint; centerPoint[2] = 0.0; circleObj = gbl_doc.ModelSpace.AddCircle(centerPoint, Radius); } public static void DrawArc(double StartingXPoint, double StartingYPoint, double Radius) { //For Drawing Arc AcadArc arcObj; AcadCircle circleObj; double[] centerPoint = new double[3]; double startAngleInDegree; double endAngleInDegree; double startAngleInRadian; double endAngleInRadian; //Draw Arc centerPoint[0] = StartingXPoint; centerPoint[1] = StartingYPoint; startAngleInDegree = 175.0; endAngleInDegree = 5.0; startAngleInRadian = startAngleInDegree * 3.141592 / 180.0; endAngleInRadian = endAngleInDegree * 3.141592 / 180.0; arcObj = gbl_doc.ModelSpace.AddArc(centerPoint, Radius, startAngleInRadian, endAngleInRadian); } public static void DrawTerminationPoint(double StartingXPoint, double StartingYPoint) { gbl_doc.ActiveLayer = TerminationPoints; DrawCircle(StartingXPoint, StartingYPoint, 1.8); DrawLine(StartingXPoint - 2.5, StartingYPoint - 4.0, (StartingXPoint - 2.5) + 4.0, (StartingYPoint - 4.0) + 7.0); gbl_doc.ActiveLayer = SwitchLayer; } #endregion } }