How to Preview PDF Attachments Directly in Business Central Web Client

Example: Viewing Email Attachments in Business Central

One practical use case for this feature is within the "Compose an Email" page. When adding a file to the Attachments tab, previously, clicking on the file name would download it. Now, we can add a "View File" action that enables direct preview in the same window.

Implementation using Page Extension

Below is an AL page extension that adds a "View File" action to the Email Attachments page. This action allows users to preview attachments without downloading them.

pageextension 69987 "MPA Email Attachments Ext" extends "Email Attachments"

{

    actions

    {

        addlast(Processing)

        {

            action(ViewFile)

            {

                ApplicationArea = All;

                Caption = 'View File';

                Image = View;

                trigger OnAction()

                var

                    TenantMedia: Record "Tenant Media";

                    FileInStream: InStream;

                begin

                    // Fetch the attachment from the "Tenant Media" table

                    TenantMedia.SetAutoCalcFields(Content);

                    TenantMedia.Get(Rec.Data.MediaId());

                    if TenantMedia.Content.HasValue() then begin

                          TenantMedia.Content.CreateInStream(FileInStream);

                          // Use the new feature to open the file in a preview window

                          File.ViewFromStream(FileInStream, Rec."Attachment Name", true);

                    end;

                end;

            }

        }

    }

}

o   The new function File.ViewFromStream(FileInStream, Rec."Attachment Name", true); is used.

o   This opens the file directly in the Business Central web client preview window.

Similarly, Added to Email Scenario Attachments

I have also applied the same functionality to the Email Scenario Attachments page.