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Use Conditionals to Check if File Exists

Robomotion•Updated 6 months ago
Use Conditionals to Check if File Exists

Overview

Checks whether a given file is present on disk and routes the flow accordingly. A textbook conditional branching example.

Use Conditionals to Check if File Exists

Implementing different logic paths based on specific conditions is essential to most automation scenarios. Conditionals enable users to check values and run different blocks of code depending on the result.

What Use Conditionals to Check if File Exists can do

  • Input Dialog titled Check if file exists, message Please populate a file name to check if it exists in your desktop folder., default FileName -> msg.user_input.
  • Branch on cancel (Core.Programming.Function, outputs: 2) — empty input short-circuits to Core.Flow.Stop.
  • Build path (Core.Programming.Function) — msg.candidate_path = global.get('$Home$') + '\Desktop\' + msg.user_input.
  • Core.FileSystem.PathExists on msg.candidate_path -> msg.exists (boolean).
  • Branch on existence (Core.Programming.Function, outputs: 2) — port 0 builds msg.dialog_text = "Filename: '<name>' exists in your desktop folder." and shows Core.Dialog.MessageBox titled File found!; port 1 builds the "doesn't exist" message and shows File not found!.

Behind the scenes

  • msg.user_input is just a filename, not a full path — the flow prepends the Desktop directory (global.get('$Home$') + '\Desktop') before the existence check. Preserve the path join exactly.
  • Cancelling the input dialog short-circuits everything; no "cancelled" dialog is shown.