[求助]自定义块的填充问题
自已定义了一个块，将其画出并返回ObjectId。根据返回的块ID，进行填充操作，代码如下：
public static void SetHatchPattern(Database acCurDb,ObjectId objEnt)
{
// Start a transaction
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// Open the Block table for read
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
OpenMode.ForRead) as BlockTable;
// Open the Block table record Model space for write
BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl,
OpenMode.ForWrite) as BlockTableRecord;
// Adds the arc and line to an object id collection
ObjectIdCollection acObjIdColl = new ObjectIdCollection();
acObjIdColl.Add(objEnt);
// Create the hatch object and append it to the block table record
Hatch acHatch = new Hatch();
acBlkTblRec.AppendEntity(acHatch);
acTrans.AddNewlyCreatedDBObject(acHatch, true);
acHatch.SetDatabaseDefaults();
acHatch.ColorIndex = 1;
//acHatch.SetHatchPattern(HatchPatternType.PreDefined, "ANSI31");
acHatch.SetHatchPattern(HatchPatternType.PreDefined, "SOLID");//实心填充，直接用设置的颜色
acHatch.Associative = true;
acHatch.AppendLoop(HatchLoopTypes.Outermost, acObjIdColl);
// Evaluate the hatch
acHatch.EvaluateHatch(true);
// Increase the pattern scale by 2 and re-evaluate the hatch
acHatch.PatternScale = acHatch.PatternScale + 2;
acHatch.SetHatchPattern(acHatch.PatternType, acHatch.PatternName);
acHatch.EvaluateHatch(true);
// Save the new object to the database
acTrans.Commit();
}
}
当执行
acHatch.AppendLoop(HatchLoopTypes.Outermost, acObjIdColl);
时，总是报错，不知是为什么啊？请高手指教！！！急
<p>图块？填充？</p>
<p>为什么不用一个封闭曲线测试一下你的代码？</p> <p>这个图块是由封闭曲线组成的啊，</p>
<p>之所以用图块，是因为所绘图形由一批这种自定义的图块组成。</p>
<p>就是想在这些图块插入后，给它们的封闭区间填充，然后就出错</p> Hatch的边界只能是曲线集合或多义线 现在还看不懂，但一定要顶 问题解决了，搞了好久，ObjectIdCollection集合中加入line，只要封闭是可以填充的。polyline加入到集合中也不能填，问题虽解决，但还是没搞懂这一点：
//========图块填充============
BlockTableRecordEnumerator enume = record.GetEnumerator();//获取块中图元对象计数器
ObjectIdCollection ids = new ObjectIdCollection();
while (enume.MoveNext())
{
DBObject dbobj = trans.GetObject(enume.Current, OpenMode.ForRead);
if (dbobj.GetType() == typeof(Line))
{
ids.Add(dbobj.ObjectId);
}
}
List<ObjectIdCollection> IDS = new List<ObjectIdCollection>();
IDS.Add(ids);
//填充图块
CDraw.HatchObject(db, trans, record, IDS, "SOLID", eColor.Red);
//============================
//填充指定实体
public static void HatchObject(Database db,Transaction trans,BlockTableRecord btr,List<ObjectIdCollection> IDS,string strHatchPattern,eColor color)
{
Hatch acHatch = new Hatch();
acHatch.SetDatabaseDefaults();
acHatch.ColorIndex = (int)color;
acHatch.SetHatchPattern(HatchPatternType.PreDefined, strHatchPattern);//实心填充，直接用设置的颜色
//acHatch.Associative = true;
foreach (ObjectIdCollection ids in IDS)
{
acHatch.InsertLoopAt(0, HatchLoopTypes.Default, ids);
}
BlockTable bt1 = trans.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
BlockTableRecord btr1 = trans.GetObject(bt1, OpenMode.ForWrite) as BlockTableRecord;
btr.AppendEntity(acHatch);
trans.AddNewlyCreatedDBObject(acHatch, true);
}
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