Let's break down why you're seeing this discrepancy between text file and image file searches, and walk through actionable fixes:

Possible Root Causes #

• Search Indexing Delay: OneDrive relies on Microsoft's backend indexing service to make files searchable. Text files (with plaintext content or filenames) get indexed quickly, but image files might take longer to process—especially if they're newly uploaded. The index might not have caught up to your image yet.
• Query Matching Logic: Text files are matched against both filename and file content, while image files (which don't have plaintext content) only match against filename metadata. If your query isn't perfectly aligned with the image's filename (e.g., typos, partial matches that aren't indexed), you won't get results.
• Search Endpoint Behavior: The search endpoint on a specific folder item has subtle differences in how it handles non-text file types compared to direct directory listing.

Fixes to Try #

1. Wait for Indexing Completion #

If the image was recently uploaded, give it a few hours (sometimes up to a day for large batches) for OneDrive's indexing service to process it. You can verify if it's indexed by searching for the image directly in the OneDrive web interface—if it shows up there, the Graph API should return it too.

2. Use Precise Search Queries #

Instead of a partial keyword like image, try:

• The full filename: GET /me/drive/items/{id-of-subdirectory}/search(q='image.png')
• The file extension to target all images: GET /me/drive/items/{id-of-subdirectory}/search(q='.png')

3. Switch to Direct Directory Listing (More Reliable for Specific File Types) #

If you need guaranteed results without relying on indexing, use the children endpoint with a filter instead of search. This bypasses the search index and directly lists items in the folder:

GET /me/drive/items/{id-of-subdirectory}/children?$filter=endswith(name,'.png')

To include items in subdirectories recursively, you can use the search endpoint with the scope parameter set to all (though this still depends on indexing):

GET /me/drive/items/{id-of-subdirectory}/search(q='.png')?$select=name,id&scope=all

4. Verify File Indexing Settings #

In the OneDrive web interface, right-click the image file → Properties → Ensure the "Don't index this file" option is not checked. If it was enabled, uncheck it and wait for reindexing.

Key Difference Between search and children #

• search: Uses Microsoft's indexed data, can return matches across filenames, content, and metadata, but depends on indexing status.
• children + $filter: Retrieves items in real-time directly from the folder structure, no indexing dependency—ideal for when you need precise, immediate results for specific file types.

内容的提问来源于stack exchange，提问作者Hlynur