hatch出现异常

LDJ · 发表于 2015-6-5 09:09:00

// 由图案填充类型、填充图案名称、
      // 填充角度和填充比例创建图案填充的函数.
      // partType:0为预定义图案；1为用户定义图案；2为自定义图案.
      private ObjectId AddHatch(out Hatch hatchEnt, HatchPatternType patType,
         String patName, Double patternAngle, Double patternScale)
      {
         //ObjectId entId = Autodesk..DatabaseServices.ObjectId.Null;

            Hatch ent = new Hatch();
            ent.HatchObjectType = HatchObjectType.HatchObject;
            Database db = HostApplicationServices.WorkingDatabase;
            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                  BlockTable bt = (BlockTable)trans.GetObject
                     (db.BlockTableId, OpenMode.ForRead);
                  BlockTableRecord btr = (BlockTableRecord)trans.GetObject
                     (bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
                  ObjectId entId = btr.AppendEntity(ent);
                  try
                  {
                     trans.AddNewlyCreatedDBObject(ent, true);
                     ent.SetDatabaseDefaults();
                     ent.PatternAngle = patternAngle;//出现异常
                     ent.PatternScale = patternScale;
                     ent.SetHatchPattern(patType, patName);
                     hatchEnt = ent;
                     return entId;
                  }
                  catch (System.Exception e)
                  {
                     MessageBox.Show(e.Message);
                     hatchEnt = ent;
                     return entId;
                  }

                  trans.Commit();

            }



      }
      [CommandMethod("testdiff", CommandFlags.UsePickSet | CommandFlags.Modal | CommandFlags.Redraw)]
      public void testdiff()
      {
            Editor ed = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;

         PromptSelectionResult res = ed.SelectImplied();
         if (PromptStatus.OK == res.Status)
         {
            // Convert the SelectionSet to MgSelectionBase using AcMapFeatureEntityService.
            Debug.Assert(res.Value != null);
            if (res.Value.Count != 1) return;
            ObjectId entityID = res.Value[0].ObjectId;
            //ObjectId entityID2 = res.Value[1].ObjectId;
               ObjectIdCollection loops1 = new ObjectIdCollection();
            loops1.Add(entityID);
            //loops1.Add(entityID2);
            ObjectIdCollection[] loops = new ObjectIdCollection[1];
            loops.SetValue(loops1, 0);
            Hatch hatchEnt;
            ObjectId hatEntId = AddHatch(out hatchEnt, 0, "ANGLE", Math.PI / 3, 10);
         Database db = HostApplicationServices.WorkingDatabase;
         // 关联填充图案与边界.
         using (Transaction tr = db.TransactionManager.StartTransaction())
         {
               hatchEnt = (Hatch)tr.GetObject(hatEntId, OpenMode.ForWrite);
               hatchEnt.Associative = true;
               for (int i = 0; i < loops.Length; i++)
               {
                  hatchEnt.AppendLoop(HatchLoopTypes.Default, loops);
               }
               tr.Commit();
         }
         }

      }
选择一个封闭的pline后运行代码，出现异常，提示eInvalidInput
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