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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Best way to use Trigge...
Small and medium business | Business Central, N...
Suggested Answer

Best way to use Trigger Events to initiate some kind of action on a table field whose value is calculated?

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Posted on by antmas 60

This question probably has an obvious answer but it eludes me, so I'd appreciate help...

With only (2?) available triggers at the (table) field level (each of which require user intervention), how can I do the following in a simple way using Trigger Events?

Let's call 4 fields A, B, C, & D.

  • The user enters something in Field A.
    • I use an OnValidate Trigger Event (of A) to Calculate a value for Field B.
  • I'd like the change in value of B to Initiate an event and change the value of Field C.
  • I'd then like to use the change in value of C to Initiate an event and perform some math to calculate the value of Field D.

Thanks in advance.

I have the same question (0)
  • antmas Profile Picture
    antmas 60 on at

    Update... This now works using OnModify Table Trigger Event so that the calculations work just before page is closed.

    If anyone has a more efficient way, please do share. thx

  • Suggested answer
    YUN ZHU Profile Picture
    YUN ZHU 100,212 Super User 2026 Season 1 on at

    Hi, Can you try the following?

    tableextension 50100 MyExtension extends item
{
    fields
    {
        field(50000; A; Code[20])
        {
            DataClassification = CustomerContent;
        }
        field(50001; B; Code[20])
        {
            DataClassification = CustomerContent;
        }
        field(50002; C; Code[20])
        {
            DataClassification = CustomerContent;
        }
        field(50003; D; Code[20])
        {
            DataClassification = CustomerContent;
        }
    }
}

codeunit 50100 MyCodeunit
{
    [EventSubscriber(ObjectType::Table, Database::Item, 'OnAfterValidateEvent', 'A', false, false)]
    local procedure MyProcedureA(var Rec: Record Item; var xRec: Record Item)
    begin
        Rec.Validate(B, 'Test');
    end;

    [EventSubscriber(ObjectType::Table, Database::Item, 'OnAfterValidateEvent', 'B', false, false)]
    local procedure MyProcedureB(var Rec: Record Item; var xRec: Record Item)
    begin
        if Rec.B <> xRec.B then
            Rec.Validate(C, 'Test2');
    end;

    [EventSubscriber(ObjectType::Table, Database::Item, 'OnAfterValidateEvent', 'C', false, false)]
    local procedure MyProcedureC(var Rec: Record Item; var xRec: Record Item)
    begin
        if Rec.C <> xRec.C then
            Rec.Validate(D, 'Test3');
    end;
}

    Hope this will help.

    Thanks.

    ZHU

  • antmas Profile Picture
    antmas 60 on at

    ZHU, Thank you for your suggestion.

    I will try this today, then reply afterward.

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