/// <summary>
/// 强行删除图层及图层上的所有实体对象
/// </summary>
/// <param name="db">图形数据库</param>
/// <param name="layerName">图层名</param>
/// <param name="delete"></param>
/// <returns></returns>
public static bool DeleteLayer(this Database db, string layerName, bool delete)
{
if (layerName == "0" || layerName == "Defpoints")
{
return(false);
}
bool isDeleteOK = false;
using (Transaction trans = db.TransactionManager.StartTransaction())
{
LayerTable lt = (LayerTable)trans.GetObject(db.LayerTableId, OpenMode.ForRead);
lt.GenerateUsageData();
if (lt.Has(layerName))
{
LayerTableRecord ltr = (LayerTableRecord)lt[layerName].GetObject(OpenMode.ForWrite);
if (delete)
{
if (ltr.IsUsed)
{
ltr.deleteAllEntityInLayer();
}
if (db.Clayer == ltr.ObjectId)
{
db.Clayer = lt["0"];
}
ltr.Erase();
isDeleteOK = true;
}
else
{
if (!ltr.IsUsed && db.Clayer != lt[layerName])
{
ltr.Erase();
isDeleteOK = true;
}
}
}
else
{
isDeleteOK = true;
}
trans.Commit();
}
return(isDeleteOK);
}
