制作cass高程点块定义——cad c#二次开发

     public class Demo{[CommandMethod("xx")]public void Demo1(){using var tr1 = new DBTrans();var doc = Application.DocumentManager.MdiActiveDocument;var db = doc.Database;var ed = doc.Editor;var 圆心 = new Point3d(0, 0, 0); var 半径 = 10.0;using (var tr = db.TransactionManager.StartTransaction()){var bt = tr.GetObject(db.BlockTableId, OpenMode.ForWrite) as BlockTable;var ms = tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;//创建块定义var btr = new BlockTableRecord();btr.Name = "MyBlock";if (bt.Has("MyBlock")){var bid = bt["MyBlock"];bid.EraseBlock();}//获取块定义的IDvar bkid = bt.Add(btr);//通过事务将块定义添加数据库tr.AddNewlyCreatedDBObject(btr, true);Circle cir = new Circle(Point3d.Origin, Vector3d.ZAxis, 1);cir.ColorIndex = 1;//将圆添加到块定义中var id = btr.AppendEntity(cir);tr.AddNewlyCreatedDBObject(cir, true);Hatch hat = new Hatch();hat.ColorIndex = 1;hat.SetHatchPattern(HatchPatternType.CustomDefined, "SOLID");hat.AppendLoop(HatchLoopTypes.Default, [id]);hat.EvaluateHatch(true);//将填充添加到块定义中btr.AppendEntity(hat);tr.AddNewlyCreatedDBObject(hat, true);//创建块参照var br = new BlockReference(圆心, bkid);br.ScaleFactors = new Scale3d(1);//ms.AppendEntity(br);// tr.AddNewlyCreatedDBObject(br, true);//属性定义AttributeDefinition attd = new AttributeDefinition();attd.Position = new Point3d(圆心.X + 半径 / 4, 圆心.Y - 半径 / 4, 0);attd.Tag = "高程";attd.Prompt = "高程提示";attd.TextString = "200";attd.Height = 半径/4;attd.ColorIndex = 1;//将属性定义添加到块定义中btr.AppendEntity(attd);tr.AddNewlyCreatedDBObject(attd, true);tr.Commit();}}public Polyline 多段线圆(Point3d pt, double 半径, int colorindex){Polyline pl = new Polyline();var p1 = new Point2d(pt.X - 半径, pt.Y);var p2 = new Point2d(pt.X + 半径, pt.Y);pl.AddVertexAt(0, p1, Math.Tan(Math.PI / 4), 0, 0);pl.AddVertexAt(1, p2, Math.Tan(Math.PI / 4), 0, 0);pl.Closed = true;pl.ColorIndex = colorindex;return pl;}}

 public static bool EraseBlock(this ObjectId objId){Database db = HostApplicationServices.WorkingDatabase;bool isErase = false;try{using (Transaction trans = db.TransactionManager.StartTransaction()){BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);if (bt.Has(objId)){BlockTableRecord bEra = (BlockTableRecord)objId.GetObject(OpenMode.ForWrite);bEra.Erase();}trans.Commit();isErase = true;}return isErase;}catch (Exception){return isErase;throw;}}

网上

public class Demo
{[CommandMethod("xx")]public void Demo1(){var doc = Application.DocumentManager.MdiActiveDocument;var db = doc.Database;var ed = doc.Editor;// 获取用户输入var insertPointResult = ed.GetPoint("\n请指定插入点: ");if (insertPointResult.Status != PromptStatus.OK) return;Point3d 插入点 = insertPointResult.Value;var elevationResult = ed.GetDouble("\n请输入高程值: ");if (elevationResult.Status != PromptStatus.OK) return;double 高程值 = elevationResult.Value;double 半径 = 10.0; // 可改为用户输入using (var tr = db.TransactionManager.StartTransaction()) // 使用单一事务{var bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForWrite);var ms = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);// 块定义处理string 块名 = "ElevationBlock";if (bt.Has(块名)){// 彻底清除旧块定义及其参照var oldBtr = (BlockTableRecord)tr.GetObject(bt[块名], OpenMode.ForWrite);oldBtr.PurgeAll(); // 清除所有关联实体oldBtr.Erase(true);}var btr = new BlockTableRecord { Name = 块名 };bt.Add(btr);tr.AddNewlyCreatedDBObject(btr, true);// 创建图形Circle cir = new Circle(Point3d.Origin, Vector3d.ZAxis, 1);cir.ColorIndex = 1;btr.AppendEntity(cir);tr.AddNewlyCreatedDBObject(cir, true);// 创建属性定义（动态计算位置）AttributeDefinition attDef = new AttributeDefinition{Position = new Point3d(1.5 * 半径, 0, 0), // 根据半径调整初始位置Prompt = "高程值",Tag = "ELEVATION",TextString = 高程值.ToString("0.00"),Height = 0.2 * 半径, // 文字高度与半径关联WidthFactor = 0.8,Justify = AttachmentPoint.MiddleLeft,ColorIndex = 1};btr.AppendEntity(attDef);tr.AddNewlyCreatedDBObject(attDef, true);// 创建块参照BlockReference br = new BlockReference(插入点, btr.ObjectId);br.ScaleFactors = new Scale3d(半径); // 缩放因子控制整体尺寸// 添加属性引用br.AttributeCollection.AppendAttribute(new AttributeReference {TextString = 高程值.ToString("0.00"),Position = attDef.Position.TransformBy(br.BlockTransform) // 应用变换});ms.AppendEntity(br);tr.AddNewlyCreatedDBObject(br, true);tr.Commit();}}// 移除未使用的多段线方法（根据需求决定是否保留）
}

加入jig功能

public class Demo
{[CommandMethod("xx")]public void Demo1(){var doc = Application.DocumentManager.MdiActiveDocument;var db = doc.Database;var ed = doc.Editor;// 第一步：获取高程值var elevationResult = ed.GetDouble("\n请输入高程值: ");if (elevationResult.Status != PromptStatus.OK) return;double 高程值 = elevationResult.Value;// 第二步：创建块定义string 块名 = "ElevationBlock";ObjectId blockId;using (var tr = db.TransactionManager.StartTransaction()){var bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);// 如果块不存在则创建if (!bt.Has(块名)){bt.UpgradeOpen();var btr = new BlockTableRecord { Name = 块名 };// 创建圆形（基准尺寸为1单位）var cir = new Circle(Point3d.Origin, Vector3d.ZAxis, 1);cir.ColorIndex = 1;btr.AppendEntity(cir);tr.AddNewlyCreatedDBObject(cir, true);// 创建属性定义var attDef = new AttributeDefinition{Position = new Point3d(1.5, 0, 0),  // 相对位置Tag = "ELEV",Prompt = "高程值",TextString = "0.00",Height = 0.2,  // 基准文字高度ColorIndex = 1,Justify = AttachmentPoint.MiddleLeft};btr.AppendEntity(attDef);tr.AddNewlyCreatedDBObject(attDef, true);blockId = bt.Add(btr);tr.AddNewlyCreatedDBObject(btr, true);}else{blockId = bt[块名];}tr.Commit();}// 第三步：使用Jig交互式插入using (var tr = db.TransactionManager.StartTransaction()){var ms = (BlockTableRecord)tr.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(db), OpenMode.ForWrite);// 创建临时块参照var br = new BlockReference(Point3d.Origin, blockId){ScaleFactors = new Scale3d(10) // 默认缩放因子};// 设置属性值var attCol = br.AttributeCollection;foreach (ObjectId attDefId in br.BlockTableRecord.GetObject<BlockTableRecord>()){if (attDefId.ObjectClass.DxfName == "ATTDEF"){var attDef = tr.GetObject(attDefId, OpenMode.ForRead) as AttributeDefinition;var attRef = new AttributeReference();attRef.SetAttributeFromBlock(attDef, br.BlockTransform);attRef.TextString = 高程值.ToString("0.00");attCol.AppendAttribute(attRef);tr.AddNewlyCreatedDBObject(attRef, true);}}// 启动拖动Jigvar jig = new BlockJig(br, 高程值);var result = ed.Drag(jig);if (result.Status == PromptStatus.OK){ms.AppendEntity(br);tr.AddNewlyCreatedDBObject(br, true);tr.Commit();}else{tr.Abort();}}}// Jig实现类public class BlockJig : EntityJig{private double _elevation;private Point3d _insertPoint;public BlockJig(BlockReference br, double elevation) : base(br){_elevation = elevation;_insertPoint = br.Position;}protected override SamplerStatus Sampler(JigPrompts prompts){var opts = new JigPromptPointOptions("\n指定插入点: ");opts.UserInputControls = UserInputControls.NullResponseAccepted;var res = prompts.AcquirePoint(opts);if (res.Status == PromptStatus.OK){if (_insertPoint.DistanceTo(res.Value) < Tolerance.Global.EqualPoint)return SamplerStatus.NoChange;_insertPoint = res.Value;return SamplerStatus.OK;}return SamplerStatus.Cancel;}protected override bool Update(){((BlockReference)Entity).Position = _insertPoint;// 更新属性位置var tr = Entity.Database.TransactionManager.TopTransaction;foreach (ObjectId attId in ((BlockReference)Entity).AttributeCollection){var attRef = tr.GetObject(attId, OpenMode.ForWrite) as AttributeReference;attRef.Position = attRef.Position.TransformBy(Matrix3d.Displacement(_insertPoint - Point3d.Origin));}return true;}}
}

封装jig

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.GraphicsInterface;
using System.Collections.Generic;public static class EntityJigger
{/// <summary>/// 交互式拖动插入多个实体/// </summary>/// <param name="entities">要插入的实体列表（建议使用未添加到数据库的副本）</param>/// <param name="basePoint">实体组合的基准点</param>/// <returns>最终的插入点（如果取消返回null）</returns>public static Point3d? DragEntities(List<Entity> entities, Point3d basePoint){var doc = Application.DocumentManager.MdiActiveDocument;var db = doc.Database;var ed = doc.Editor;using (var tr = db.TransactionManager.StartTransaction()){try{// 创建临时实体副本var tempEntities = new List<Entity>();foreach (var ent in entities){var clone = ent.Clone() as Entity;clone.TransformBy(Matrix3d.Displacement(basePoint.GetVectorTo(Point3d.Origin)));tempEntities.Add(clone);}// 创建Jig实例var jig = new MultiEntityJig(tempEntities, basePoint);var result = ed.Drag(jig);if (result.Status == PromptStatus.OK){// 正式添加实体到模型空间var ms = (BlockTableRecord)tr.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(db),OpenMode.ForWrite);foreach (var ent in tempEntities){ms.AppendEntity(ent);tr.AddNewlyCreatedDBObject(ent, true);}tr.Commit();return jig.InsertPoint;}tr.Abort();return null;}catch{tr.Abort();throw;}}}/// <summary>/// 多实体拖动Jig实现/// </summary>private class MultiEntityJig : DrawJig{private readonly List<Entity> _entities;private Point3d _basePoint;private Point3d _insertPoint;public Point3d InsertPoint => _insertPoint;public MultiEntityJig(List<Entity> entities, Point3d basePoint){_entities = entities;_basePoint = basePoint;_insertPoint = basePoint;}protected override SamplerStatus Sampler(JigPrompts prompts){var opts = new JigPromptPointOptions("\n指定插入点: "){UserInputControls = UserInputControls.Accept3dCoordinates |UserInputControls.NoZeroResponse |UserInputControls.NoNegativeResponse};var result = prompts.AcquirePoint(opts);if (result.Value.DistanceTo(_insertPoint) < Tolerance.Global.EqualPoint)return SamplerStatus.NoChange;_insertPoint = result.Value;return SamplerStatus.OK;}protected override bool WorldDraw(WorldDraw draw){// 计算位移矩阵var vector = _basePoint.GetVectorTo(_insertPoint);var matrix = Matrix3d.Displacement(vector);// 绘制所有临时实体foreach (var ent in _entities){draw.Geometry.Draw(ent);ent.TransformBy(matrix);}return true;}}
}[CommandMethod("testJig")]public void TestJigCommand(){var doc = Application.DocumentManager.MdiActiveDocument;var db = doc.Database;var ed = doc.Editor;// 创建要插入的实体集合var entities = new List<Entity>();// 创建圆形（基准位置在原点）var circle = new Circle(Point3d.Origin, Vector3d.ZAxis, 5);circle.ColorIndex = 1;entities.Add(circle);// 创建单行文字var text = new DBText{Position = new Point3d(8, 0, 0),TextString = "高程值",Height = 2,ColorIndex = 2,Justify = AttachmentPoint.MiddleLeft};entities.Add(text);// 设置基准点（通常取组合的中心点）var basePoint = new Point3d(0, 0, 0);// 调用Jig进行拖动插入var resultPoint = EntityJigger.DragEntities(entities, basePoint);if (resultPoint.HasValue){ed.WriteMessage($"\n插入点坐标：{resultPoint.Value}");}}