Question

Is there a way through the Revit API to change which document is the current ActiveUIDocument (ExternalCommandData.Application.ActiveUIDocument)? I want to print multiple views from multiple project files using the API but I need to be able to change the current ActiveUIDocument first.

Answer 1

With the Revit 2012 API there is a new method OpenAndActivateDocument on the UIApplication object. As the method name says it will open and activate the document that you specify with a file path. I tested this and it worked for printing multiple files.

public void Plot(ExternalCommandData commandData, string[] files)
{
  UIApplication uiApplication = commandData.Application;

  foreach (string file in files)
  {
    Document document = uiApplication.OpenAndActivateDocument(file);

    //Do action on active document
  }
}