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Namespace: Autodesk.Revit.DB

SketchEditScope

Class
Description:
A SketchEditScope allows an application to create and maintain an editing session for a Sketch.
Remarks:
Start/end of a SketchEditScope will start/end a transaction group. After a SketchEditScope is started, an application can start transactions and edit the sketch. Individual transactions the application creates inside SketchEditScope will not appear in the undo menu. All transactions committed during the edit mode will be merged into a single one which will bear the given name passed into SketchEditScope constructor.
Inheritance Hierarchy:
System.Object
  Autodesk.Revit.DB.EditScope
    Autodesk.Revit.DB.SketchEditScope
Syntax 
public class SketchEditScope : EditScope
Examples 
public void ReplaceBoundaryLine(Document document)
{
   FilteredElementCollector floorCollector = new FilteredElementCollector(document)
      .WhereElementIsNotElementType()
      .OfCategory(BuiltInCategory.OST_Floors).OfClass(typeof(Floor));

   Floor floor = floorCollector.FirstOrDefault() as Floor;
   if (floor == null)
   {
      TaskDialog.Show("Error", "Document does not contain a floor.");
      return;
   }

   Sketch sketch = document.GetElement(floor.SketchId) as Sketch;

   Line line = null;
   foreach (CurveArray curveArray in sketch.Profile)
   {
      foreach (Curve curve in curveArray)
      {
         line = curve as Line;
         if (line != null)
         {
            break;
         }
      }
      if (line != null)
      {
         break;
      }
   }

   if (line == null)
   {
      TaskDialog.Show("Error", "Sketch does not contain a straight line.");
      return;
   }

   // Start a sketch edit scope
   SketchEditScope sketchEditScope = new SketchEditScope(document, "Replace line with an arc");
   sketchEditScope.Start(sketch.Id);

   using (Transaction transaction = new Transaction(document, "Modify sketch"))
   {
      transaction.Start();

      // Create arc
      XYZ normal = line.Direction.CrossProduct(XYZ.BasisZ).Normalize().Negate();
      XYZ middle = line.GetEndPoint(0).Add(line.Direction.Multiply(line.Length / 2));
      Curve arc = Arc.Create(line.GetEndPoint(0), line.GetEndPoint(1), middle.Add(normal.Multiply(20)));

      // Remove element referenced by the found line. 
      document.Delete(line.Reference.ElementId);

      // Model curve creation automatically puts the curve into the sketch, if sketch edit scope is running.
      document.Create.NewModelCurve(arc, sketch.SketchPlane);

      transaction.Commit();
   }

   sketchEditScope.Commit(new FailuresPreprocessor());
}