October 15, 2018

Dynamo: Export Views and Sheets from Revit - Part 4

First post in this Series [Part 1]
Previous post in this series [Part 3]

This post describes the nodes that generate the file names for the exported drawing files. As you may recall from the previous posts in this series, a list of Views and Sheets was generated from a user-created ViewSheetSet in Revit® by a Python Script node. That list was then separated into two lists, one for Views and one for Sheets, to allow for separate naming conventions for the exported drawing files for each. (Specifically, so that the sheet number can be included in the file name for Sheets.) The nodes that do this are contained in three groups: Generate Names for Exported Views, Generate Names for Exported Sheets and Combine Names....
All three groups make use of out-of-the-box nodes. The first two groups are nearly identical, and can be described simultaneously. The first node in each of those groups is a Code Block node, renamed to Exported DWG File Name Format for Views for the exported Views and Exported DWG File Name Format for Sheets for the exported Sheets. Each of these nodes has one input, view which takes the respective list from the List.FilterByBoolMask node covered in Part 3. A combination of parameter values associated with each View/Sheet and text is used to create the file name for each View/Sheet:
  • For Views: dwgname = view.Name + "_Export" + ".dwg";
  • For Sheets: dwgname = view.SheetNumber + "_" + view.Name + "_Export" + ".dwg";
The drawing name for Views concatenates the view.Name parameter value with "_Export" and the ".dwg" file extension. The drawing name for Sheets is similar, but adds the view.SheetNumber parameter values at the beginning, separating the sheet number from the sheet name with an underscore ("_") character. This is what I set up as a default for use in my office; you can customize this to meet your needs by adding, removing or rearranging the parts.

The lists of Sheet and View names are then run through two String.Replace nodes. The first replaces any asterisks ("*") with underscores ("_") and the second replaces any forward slashes ("/") with hyphens ("-"), as neither of these characters are permitted in a drawing file name, even though they are allowed in a View or Sheet name in Revit. Each resulting list of file names is then passed through a Watch node, so that the contents can be inspected after the graph is run. These two lists are then sent to the Combine Name... group, where a List.Create node and a Flatten node combine them into a single list. An optional Watch node is included here, as well.

So now we have a combined list of View and Sheet objects (from Part 3) and a combined list of file names for the corresponding exported files. The next post will look at the remaining user input nodes.

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