I think I found a potential problem. It appears that the GetThumbnailImage is getting called at least twice for each image, possibly even more on larger datasets. This isn't a problem for small datasets, but when using large datasets and using custom HTTP authentication, this multiple firing of GetThumbnailImage per image is creating quite a delay in our code. Can you please take a look at this and see if you're seeing this on your end? We even have the thumbnail caching turned on.
WinExplorerView - Thumbnail images are loaded twice
Answers approved by DevExpress Support
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.
- v15.2.4Download Official Update
- v15.1.8Download Official Update
Thank you for taking a look at this and confirming. I think it's a big issue that needs to be addressed as soon as possible.