public static void Clear()
{
Database acCurDb = HostApplicationServices.WorkingDatabase;
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Editor acEdt = acDoc.Editor;
/// 让用户选择是否清除块内的图元，Y：清除，N：不清除
PromptStringOptions optRecurseIn = new PromptStringOptions("是否包括块内和锁定图层内的图元？[是(Y)/否(N)]")
{
AllowSpaces = false,
DefaultValue = "N"
};
PromptResult resStringResult;
do
{
resStringResult = acEdt.GetString(optRecurseIn);
} while (resStringResult.StringResult.ToUpper() != "Y" && resStringResult.StringResult.ToUpper() != "N");
bool recurseIn = (resStringResult.StringResult.ToUpper() == "Y");
//对图形进行修改
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction()) {
ulong countTotal = 0;
ulong countCleared = 0;
//遍历模型空间的清零
BlockTableRecord btRecord = (BlockTableRecord)acTrans.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(acCurDb), OpenMode.ForRead, false, true);
btRecord.Clear(ref countTotal, ref countCleared, recurseIn);
acEdt.WriteMessage("共检查了" + countTotal + "个对象，其中" + countCleared + "个对象的Z坐标已经清除。\n");
//提交执行
acTrans.Commit();
}
}
/// <summary>
/// 对传入的BlockTableRecord中的每个图元单独运行清零函数
/// </summary>
/// <param name="btRecord">待清零的块定义</param>
/// <param name="countTotal">检查过的图元计数</param>
/// <param name="countCleared">清零的图元计数</param>
/// <param name="recurseIn">是否清零块内和锁定图层内的图元的Z坐标，true：清除，false：不清除</param>
/// <returns></returns>
internal static void Clear(this BlockTableRecord btRecord, ref ulong countTotal, ref ulong countCleared, bool recurseIn = false)
{
Database acCurDb = HostApplicationServices.WorkingDatabase;
List <Entity> objList = new List <Entity>();
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction()) {
foreach (ObjectId id in btRecord)
{
Entity myObj = (Entity)acTrans.GetObject(id, OpenMode.ForWrite, false, true);
LayerTable acLyrTbl = acTrans.GetObject(acCurDb.LayerTableId, OpenMode.ForRead) as LayerTable;
LayerTableRecord acLyrTblRec = acTrans.GetObject(myObj.LayerId, OpenMode.ForWrite) as LayerTableRecord;
bool curLayerLocked = acLyrTblRec.IsLocked;
acLyrTblRec.IsLocked = false;
//对块内和锁定图层内的图元进行清零操作，递归
if (myObj is BlockReference && recurseIn)
{
BlockReference br = acTrans.GetObject(id, OpenMode.ForRead) as BlockReference;
BlockTableRecord myBlock = (BlockTableRecord)br.BlockTableRecord.GetObject(OpenMode.ForWrite, false, true);
myBlock.Clear(ref countTotal, ref countCleared, recurseIn);
}
//对普通图元进行操作
if (!curLayerLocked || recurseIn)
{
if (myObj.Clear())
{
countCleared++;
}
}
countTotal++;
acLyrTblRec.IsLocked = curLayerLocked;
}
acTrans.Commit();
}
return;
}