//A simple method to create a wall using the Revit API
public static Revit.Elements.Element Create(double lenghtInFt, int levelId)
{
//Get the active document object
Document doc = DocumentManager.Instance.CurrentDBDocument;
//Create new points using the Revit API to build a line
XYZ ptStart = new XYZ(); //no inputs creates an XYZ at 0,0,0
XYZ ptEnd = new XYZ(lenghtInFt, 0.0, 0.0);
//Create a Revit API line to define the location curve of the new wall element
Line lnLocationCurve = Line.CreateBound(ptStart, ptEnd);
//Create an ElementId object from the levelId input of the method
ElementId levelElementId = new ElementId(levelId);
//Open a new transaction using Dynamo's RevitServices library. Transactions must be
//opened when creating, modifying or deleting elements from a Revit document
TransactionManager.Instance.EnsureInTransaction(doc);
//Instantiate the new wall element
Wall newWall = Wall.Create(doc, lnLocationCurve, levelElementId, false);
//Clos the transction to submit the new element into the document
TransactionManager.Instance.TransactionTaskDone();
//Return the new wall element and wrap it in Dynamo's Revit wrpper class and also
//create a binding between the node and element in Revit to prevent duplicates and create
//a synchorinisation/dynamic interop between the two applications
return(newWall.ToDSType(false));
}
