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Common Dialog Management CU in Business Central

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Posted on by FurkanR

Hello Dear Community,

I am newbie in AL on BC. I converted my Codeunits in Dynamics NAV to Business Central. Some system codeunits and functions are missing. Is there anything Codeunit instead of Common Dialog Management ? Or do we have to delete all codes of these and have to find another solutions ?

Thanks for your support and guidance.

If this will be solved, I have a question about File Record. There is a File record in BC but it gives an error.

Thanks for your supports.

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Dynamics 365 Business Central

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Yash_Mistry 527 on at

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If you want to enable file Upload you can use below code in your AL:

UploadIntoStream('Select File', '', '', FileName, InStream);

Hope this helps.

Regards,
Yash Mistry

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YUN ZHU 102,123 Super User 2026 Season 1 on at

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Below are a few examples of file uploads, which hopefully will give you some hints.

How to use Excel Buffer to Import data

Import Multiple Customer Pictures (Customization)

How to import data from CSV (comma-separated values) file

How to import files from a zip file (Bulk import attachments and Excel files)

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Aman Kakkar 3,597 Super User 2026 Season 1 on at

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Hi,

I don’t believe the codeunit Common Dialog Management is available in modern Business Central AL, especially in SaaS environments. In Business Central, the recommended approach is to use functions such as UploadIntoStream and DownloadFromStream for file upload and download operations.

For example:

Use UploadIntoStream to let users upload a file into a stream

Use DownloadFromStream to allow downloading files

Regarding your second question about the File record, there is no standard table/record named File in Business Central that can be used like in older NAV versions. However, AL does provide a File data type, which is used for file handling in certain scenarios (mainly OnPrem).

Could you please confirm whether you are referring to the File data type or a custom/legacy record from NAV?

Do mark it as verified if this helps.

Aman K

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OussamaSabbouh 17,906 Super User 2026 Season 1 on at

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Hello,

There’s no real 1:1 replacement for Common Dialog Management in modern BC AL extensions; when moving from NAV, you usually need to replace old file/dialog logic with stream-based handling like UploadIntoStream and DownloadFromStream. The File record/object error is also expected because those APIs are OnPrem and not allowed in standard Extension development, so the fix is usually to stop using direct file system access and redesign around InStream/OutStream, Temp Blob, and upload/download methods instead.

Regards,
Oussama Sabbouh

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Gerardo Rentería Ga... 27,310 Most Valuable Professional on at

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Hi, good day
I hope this can help you, and give you some hints.

How to upload and download files to and from Dynamics 365 BC

Best Regards
Gerardo

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