File upload

Use the upload file method and UploadFileCompletedEvent to monitor and control file uploads in web presentation engine sessions. Understand constraints and browser behavior for secure file management.
IMPORTANT:
File upload overwrites files with duplicate names and extensions in the target folder.

Overview

Use the Upload file method to trigger file uploads in a web presentation engine session. Attach the method to a UI event, such as a MouseClick event, and specify the output folder path for the uploaded file. The UploadFileCompletedEvent triggers when the upload completes, providing the operation ID, result code, and file path. Use these arguments to handle upload results, display status, or process the uploaded file in the application.

Constraints

File upload operations include several constraints for security and consistency:
  • File upload is allowed only to the
    ProjectFiles
     folder and its subfolders, except for the
    NetSolution
     and
    PKI
     folders.
  • Maximum upload size is 50 MB per file.
  • File upload overwrites files with duplicate names and extensions in the target folder.
  • File upload is granted only with read and write permissions; execution permission is not allowed.
  • File upload must comply with the allowed local source policy.
  • A warning dialog displays during deployment if the Upload file method is present, reminding to validate uploaded content for security.
  • By default, only users who are signed in can upload files.
IMPORTANT:
FactoryTalk Optix
 does not guarantee that uploaded files are free from malicious content. You must validate the uploaded files before using them in the project.

Web browsers

The web browser controls file selection and upload parameters.
FactoryTalk Optix Applications
 only initiates and detects when file upload starts.
File upload is not supported for the native presentation engine. If attempted, a warning displays in the log.
For specific information about supported web browsers, see
FactoryTalk Optix Release Notes
.
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