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Downloading file from Blob Field

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Posted on by MG-04060224-0

8

I created custom table with blob field called 'certification' and card for this table. And actions for download/uploading. Both action works without any error but after downloading .pdf file, it does not open and shows error: /Failed to load PDF document./. But it worked fine with 3kb file. Is there size limit for blob field? Or should I use different approach for uploading file to my custom table?

Code for download/upload

procedure UploadFile(DocumentInStream: InStream; FileName: Text)

var

OStream: OutStream;

begin

Rec.certification.CreateOutStream(OStream);

CopyStream(OStream, DocumentInStream);

Modify(true);

end;

procedure DownloadFile()

var

IStream: InStream;

ExportFileName: Text;

begin

ExportFileName := Rec.companyName + ' - ' + Format(Rec.SystemCreatedAt) + '.pdf';

Rec.CalcFields(Rec.certification);

If Rec.certification.HasValue then begin

Rec.certification.CreateInStream(IStream);

DownloadFromStream(IStream, 'Download', '', '', ExportFileName);

end;

end;

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Dynamics 365 Business Central

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Gerardo Rentería Ga... 25,545 Most Valuable Professional on at

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Hi

I hope this can help you and give you some hints

Blob Guide In Business Central In 2024 - Business Central Geek

Dynamics 365 Business Central: How to bulk export/download attachments (Downloading multiple attachments via zip file) – Customization | Dynamics 365 Lab (yzhums.com)

BR

GR

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Shivi1307 13 on at

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https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/methods-auto/file/file-downloadfromstream-method

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