如何不用拖选就能把所有的直线选中

介之推 · 发表于 2011-8-12 10:26:00

大家好，通过定义选择集来选择时需要在窗口上用鼠标拖动光标来选择，有没有不用拖选就能直接选中所有的直线？下面的代码需要手动选才行。
[CommandMethod("AllLines")]
      public void seletcAllLines()
      {
         Document doc = Autodesk..ApplicationServices.Application.DocumentManager.MdiActiveDocument;
         Database db = doc.Database;
         Editor ed = doc.Editor;
         using (Transaction trans = db.TransactionManager.StartTransaction())
         {
            try
            {
                  //define the criteria for selecting lines only
                  TypedValue[] tv = new TypedValue[] { new TypedValue((int)DxfCode.Start, "LINE") };
                  SelectionFilter flt = new SelectionFilter(tv);
                  /*This method needs to drag the cursor,which I think is not smart.
                  I will want to improve*/
                  PromptSelectionOptions optSel = new PromptSelectionOptions();
                  optSel.MessageForAdding = "You will need to drag this cursor to select.";
                  PromptSelectionResult resSel = ed.GetSelection(optSel,flt);
                  SelectionSet selSet = resSel.Value;
                  ObjectId[] ids = selSet.GetObjectIds();
                  foreach (ObjectId sSetEntId in ids)
                  {

                     Entity ent = (Entity)trans.GetObject(sSetEntId, OpenMode.ForWrite);
                     if (ent.GetType().Name=="Line")  //请问有更好的判断方法吗？typeof(ent) is Line在这里出错。
                     {
                        Line myLine = (Line)trans.GetObject(sSetEntId, OpenMode.ForWrite);
                        ed.WriteMessage("\n"+myLine.StartPoint.ToString()+ myLine.EndPoint.ToString());
                     }

         }
                  trans.Commit();
            }
            catch(System.Exception ex)
            {
                  ed.WriteMessage(ex.Message + "\n" + ex.StackTrace);
            }
         }
      }

sunchengbo2007 · 发表于 2011-8-12 16:23:00

试试直接用ObjectId——
foreach (ObjectId sSetEntId in ids)
{

   //Entity ent = (Entity)trans.GetObject(sSetEntId, OpenMode.ForWrite);
   if (sSetEntId.ObjectClass.DFXName == "LINE")
   {
         Line myLine = (Line)trans.GetObject(sSetEntId, OpenMode.ForWrite);
         ed.WriteMessage("\n"+myLine.StartPoint.ToString()+ myLine.EndPoint.ToString());
   }

}

cdinten · 发表于 2011-8-13 10:47:00

遍历数据库

sieben · 发表于 2011-8-13 10:55:00

if (ent.GetType().Name=="Line") //请问有更好的判断方法吗？typeof(ent) is Line在这里出错
1,ent is Line
2, ent.GetType(). == typeof(Line)
3,public Autodesk.AutoCAD.EditorInput.PromptSelectionResult SelectAll(Autodesk.AutoCAD.EditorInput.SelectionFilter filter)
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