File Operations

Momen supports file-related actions on Web and Native App, including upload, view, download, and bitmap export.

File actions include:

Upload File
View File
Download File
Download Bitmap

Upload File

Overview

Upload a local file to the server. Supported formats include PDF, Word, Excel, audio, and video.

File selection: Let users pick a file from their device
Format support: Common document, audio, and video types
Data storage: Save the result to a page variable or database
Status feedback: Use success/failure actions for user feedback
Business integration: Combine with form submission workflows

Platform differences:

Platform	Behavior
Web	Pick files from the system file picker; supports a wide range of formats
Native App	Pick files from the device file system

Configuration

Parameter	Required	Description
Target page variable	Yes	File-type page variable to store the upload result
File size limit	No	Maximum file size (platform defaults apply)
On success	No	Actions after a successful upload (toast, database save, navigation)
On failure	No	Actions after a failed upload (error toast, retry)

Output

Field	Description
File info	File object with name, size, type, URL, etc., stored in the page variable
Upload status	`true` (success) or `false` (failure)

Notes

Add a File page variable before configuring the action.
Only one file per upload; a new upload overwrites the previous file.
File preview is not supported during upload.

Examples

Resume upload


Trigger: Upload resume button
Target page variable: resume_file
On success:
  1. Show toast "Resume uploaded"
  2. Save to database via data mutation
  3. Update page state
On failure: Show toast "Upload failed — please retry"

Contract upload


Trigger: Upload contract button
Target page variable: contract_file
On success:
  1. Show toast "Contract uploaded"
  2. Enable submit button
  3. Save file info to form data
On failure: Show error and allow retry

Platform Support

Web
Native App

View File

Overview

Open and preview file content in the app. Supports PDF, Word, Excel, images, and other common formats.

Preview: View files inside the app
Local files: View files stored in page variables
Remote files: View files from database records via page data

Configuration

Parameter	Required	Description
File source	Yes	Local upload (page variable) or File (database record)
File data	Yes	Page variable or page data field binding
File name	No	Custom display name

Output

No direct output. The action opens a file viewer.

Prerequisites

To view database files, configure the relevant page data source.
File size should not exceed 20 MB.

Examples

View uploaded resume


Trigger: View resume button
File source: Local upload
File data: resume_file page variable

View stored document


Trigger: View button in document list
File source: File
File data: document field from page data

Platform Support

Native App

Download File

Overview

Download a file stored in the database to the user’s local device.

Configuration

Parameter	Required	Description
File data source	Yes	Page data field binding to a file column
Download file name	No	Custom filename (defaults to original name)

Output

No direct output. Triggers the browser or system download.

Prerequisites

Configure a page data source that queries the file record.

Examples

Download report


Trigger: Download report button
File data source: report_file from page data
Download file name: "{report_name}_{date}.pdf"

Download contract


Trigger: Download contract button
File data source: contract document field

Platform Support

Web

Download Bitmap

Overview

Convert a specified view region on the page into an image and download it locally.

View to image: Export a container or section as a bitmap
Content export: Capture complex layouts as images
Sharing: Generate images for social sharing or records

Configuration

Parameter	Required	Description
Target view component	Yes	Container component to convert
Image format	No	PNG, JPEG, etc. (default: PNG)
Image quality	No	Number 0–1 (default: 1.0)
Download file name	No	Custom filename

Output

Field	Description
Bitmap data	Generated image for download or further use
Conversion status	`true` (success) or `false` (failure)

Workflow

To download a view as an image:

Add Component Operations → View → View to Image and specify the target view component ID.
On success, add File Operations → Image → Download Bitmap and bind the result data.

Examples

Page screenshot


Step 1: View to Image
  Target: Main page container
  Format: PNG

Step 2: Download Bitmap
  Trigger: Download screenshot button
  Bitmap data: Conversion result
  File name: screenshot_{timestamp}.png

Share card


Step 1: View to Image
  Target: Share card container
  Format: JPEG
  Quality: 0.8

Step 2: Download Bitmap
  Bitmap data: Conversion result
  Purpose: Generate a shareable card image

Platform Support

Web

Notes

The target view must be fully loaded before conversion for accurate results.