CAD定义图块（com接口c#语言） - 梦想CAD控件

CAD定义图块（com接口c#语言）

定义图块

c#将选中的实体做成块实现代码：

                MxDrawSelectionSet ss = new MxDrawSelectionSet();
                ss.Select(MCAD_McSelect.mcSelectionSetUserSelect, null, null, null);


                List<Int64> aryId = new List<Int64>();
                for (Int32 i = 0; i < ss.Count; i++)
                {
                    MxDrawEntity ent = ss.Item(i);
                    if (ent != null)
                    {
                        aryId.Add(ent.ObjectID);
                        ent.Close();
                    }
                }
                 MxDrawDatabase curDatabase = (MxDrawDatabase)(mxdraw.GetDatabase());

            double dMinX = 0, dMinY = 0, dMaxX = 0, dMaxY = 0;
            bool isFirstEnt = true;
            for (int l = 0; l < aryId.Count; l++)
            {
                MxDrawMcDbObject pObj = curDatabase.ObjectIdToObject(aryId[l]);
                if (pObj == null)
                    continue;


                MxDrawPoint pt1Ob, pt2Ob;

                MxDrawEntity pEnt = (MxDrawEntity)pObj;
                if (pEnt == null)
                    continue;

                pEnt.GetBoundingBox(out pt1Ob, out pt2Ob);

                MxDrawPoint minPt = (MxDrawPoint)pt1Ob;
                MxDrawPoint maxPt = (MxDrawPoint)pt2Ob;

                if (minPt != null && maxPt != null)
                {
                    if(isFirstEnt)
                    {
                        dMinX = minPt.x;
                        dMinY = minPt.y;
                        dMaxX = maxPt.x;
                        dMaxY = maxPt.y;
                        isFirstEnt = false;
                    }
                    else
                    {
                        if (dMinX > minPt.x)
                            dMinX = minPt.x;

                        if (dMinY > minPt.y)
                            dMinY = minPt.y;

                        if (dMaxX < maxPt.x)
                            dMaxX = maxPt.x;

                        if (dMaxY < maxPt.y)
                            dMaxY = maxPt.y;
                    }
                }
            }

            if(isFirstEnt)
            {
                // 没有实体
                return 0;
            }

            MxDrawPoint pos = new MxDrawPoint();
            pos.x = dMinX + (dMaxX - dMinX) / 2.0;
            pos.y = dMinY + (dMaxY - dMinY) / 2.0;

            // 检查新创建的块名，在当前数据库是否已经存在.

            MxDrawBlockTable blkTable = curDatabase.GetBlockTable();
            MxDrawBlockTableRecord curSpace = curDatabase.CurrentSpace();

            String sNewBlakName;

                MxDrawBlockTableRecord blkNewRec = blkTable.Add("");
                sNewBlakName = blkNewRec.Name;

                blkNewRec.Origin = pos;

                for (int l = 0; l < aryId.Count; l++)
                {

                    blkNewRec.AddCloneEntity(aryId[l]);
                    // 把以前实体删除 。
                    MxDrawMcDbObject pObj = curDatabase.ObjectIdToObject(aryId[l]);
                    if (pObj == null)
                        continue;
                    pObj.Erase();
                }


            if (blkNewRec != null)
            {
                MxDrawBlockReference blkRef = curSpace.InsertBlock(pos.x,pos.y, sNewBlakName, 1.0, 0.0);
                MxDrawAttribute attrib = blkRef.AppendAttribute();
                attrib.Position = pos;
                attrib.AlignmentPoint = pos;
                attrib.Oblique = 0.0;
                attrib.Rotation = 0.0;
                attrib.Height = 2.0;
                attrib.TrueColor.SetRGB(255,0,0);

               // attrib.TextString = "这是一个属性文字的测试";

                attrib.Tag = "TestTag";
                attrib.IsInvisible = false;

                blkRef.Position = blkRef.Position;

                return blkRef.ObjectID;
            }
            return 0;