static void AddHolesToParcel(ObjectId parcelId, ObjectId groupId, ObjectId[] holeIds)
{
Database database = parcelId.Database;
// 将扣除的孔洞等图形放到孔洞图层，以绿色醒目显示
var layerId = LayerUtils.GetLayerByName(database, "孔洞");
if (!layerId.IsValid)
{
layerId = LayerUtils.AddNewLayer(database, "孔洞", "Continuous", /*GREEN*/ 3);
}
// 看看选择的地块是不是真的在地块里面了
var availableHoles = new List <ObjectId>();
using (var tr = database.TransactionManager.StartTransaction())
{
var reader = new DwgReader();
var curve = tr.GetObject(parcelId, OpenMode.ForRead) as Curve;
if (curve != null && curve.Closed)
{
var polygon1 = reader.ReadCurveAsPolygon(tr, curve);
foreach (var holeId in holeIds)
{
var hole = tr.GetObject(holeId, OpenMode.ForRead) as Curve;
// 只添加地块为封闭的
if (hole == null || !hole.Closed)
{
continue;
}
// 继续，看看是不是在地块中间，不在就跳过
var polygon2 = reader.ReadCurveAsPolygon(tr, hole);
if (!polygon1.Contains(polygon2))
{
continue;
}
// 如果是，添加地块
hole.UpgradeOpen();
CadUtils.SetCassFlag(hole, CassFlagIsland);
hole.LayerId = layerId;
availableHoles.Add(holeId);
// 如果组不是空，直接加入组
if (!groupId.IsNull)
{
GroupUtils.AppendEntityIntoGroup(database, groupId, holeId);
}
}
}
tr.Commit();
}
// 如果没有group，创建group
if (groupId.IsNull)
{
var ids = new ObjectIdCollection()
{
parcelId
};
foreach (var availableHole in availableHoles)
{
ids.Add(availableHole);
}
GroupUtils.CreateNewGroup(database, "*A", ids);
}
}