public void LayerDemo()
{
Database db = HostApplicationServices.WorkingDatabase;
AddLayerResult alr = db.AddLayer("文字");
db.ChangeLayerColor("文字", 1);
//db.LockLayer("文字");
//db.UnLockLayer("文字");
//db.ChangleLineWeight("文字", LineWeight.LineWeight050);
//db.SetCurrentLayer("文字");
//List<LayerTableRecord> list = db.GetAllLayers();
//db.DeleteLayer("图层1",true);
db.DeleteNotUsedLayer();
}
/// <summary>
/// 添加图层
/// </summary>
/// <param name="db">图形数据库</param>
/// <param name="layerName">图层名</param>
/// <returns>AddLayerResult</returns>
public static AddLayerResult AddLayer(this Database db, string layerName)
{
//声明AddLayerResult类型的数据，用户返回
AddLayerResult res = new AddLayerResult();
try
{
SymbolUtilityServices.ValidateSymbolName(layerName, false);
}
catch (Exception)
{
res.statuts = AddLayerStatuts.IllegalLayerName;
return(res);
}
using (Transaction trans = db.TransactionManager.StartTransaction())
{
//打开层表
LayerTable lt = (LayerTable)trans.GetObject(db.LayerTableId, OpenMode.ForRead);
//新建层表记录
if (!lt.Has(layerName))
{
LayerTableRecord ltr = new LayerTableRecord();
//判断要创建的图层名是否已经存在,不存在则创建
ltr.Name = layerName;
//升级层表打开权限
lt.UpgradeOpen();
lt.Add(ltr);
//降低层表打开权限
lt.DowngradeOpen();
trans.AddNewlyCreatedDBObject(ltr, true);
trans.Commit();
res.statuts = AddLayerStatuts.AddLayerOK;
res.layerName = layerName;
}
else
{
res.statuts = AddLayerStatuts.LayerNameExist;
}
}
return(res);
}
