Clearing the Active SelectionSet

Mark Bosley

What does the Clear method on the ActiveSelectionSet do.

After I have the user select some items on the drawing, I do some processing.

Then I want to clear the selected (and highlighted items) so I do the following (myActiveDoc is a reference to the Active Document)

myActiveDoc.ActiveSelectionSet.Clear()

After doing this, the property myActiveDoc.ActiveSelectionSet.Count is not zero as I would expect.

Another question, are selected items necessarily highlighted. Is there a way of unhighlighting all items?

Thank you , Mark Bosley

 

Its_Alive

Hi Mark,

This code seems to work as advertised, you may be needing to cache a copy of the ActiveSet to variable.

 

 public static class Commands
  {
    [CommandMethod("doit")]
    public static void test01()
    {
      var app = Application.AcadApplication as AcadApplication;
      var doc = app.ActiveDocument;
      try
      {
        AcadSelectionSet aset = doc.ActiveSelectionSet;
        doc.Utility.Prompt(String.Format("\n{0}", aset.Count));
        foreach (AcadEntity e in aset)
          e.Highlight(true);
        //foreach (AcadEntity e in aset)
         // e.Highlight(false);
        aset.Clear();
        doc.Utility.Prompt(String.Format("\n{0}", aset.Count));
        aset.Delete();
      }
      catch (System.Exception ex)
      {
        doc.Utility.Prompt(String.Format("\n{0}", ex.Message));
      }
    }
  }