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[CommandMethod("createLayer")]
public ObjectId CreateLayer() //-----------------------------------1-------------------------------
{
ObjectId layerId=new ObjectId(); //它返回函数的值
Database db = HostApplicationServices.WorkingDatabase;
Editor ed = Autodesk..ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
Transaction trans = db.TransactionManager.StartTransaction();
//首先取得层表……
LayerTable lt = (LayerTable)trans.GetObject(db.LayerTableId, OpenMode.ForWrite);
//检查EmployeeLayer层是否存在……
if (lt.Has("EmployeeLayer"))
{
layerId = lt["EmployeeLayer"];
}
else
{
//如果EmployeeLayer层不存在，就创建它
LayerTableRecord ltr = new LayerTableRecord();
ltr.Name = "EmployeeLayer"; //设置层的名字
ltr.Color = Color.FromColorIndex(ColorMethod.ByAci, 2);
layerId = lt.Add(ltr);
trans.AddNewlyCreatedDBObject(ltr, true);
}
trans.Commit(); trans.Dispose();
return layerId; //-----------------------------------2-------------------------------
}
调试时报错，但将程序返回类型改为void：-----1--------处改为public void CreateLayer() ，-------2------处去掉，则可正常建立层，这是为什么？
另外，要将建立的层设为当前层，我该怎么做？
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置顶卡
