Assign an App procedure to a Component Event??

[Ian Branch 141]

Hi Team,

I have a TTable  called JobTickets and I want to assign a Unit procedure to its AfterInsert event at run time.

Something like..

 JobTickets.AfterInsert(DataSet: TDataSet) := JobTicketsAfterInsert(DataSet: TDataSet);

Delphi doesn't like the above.  😞

What do I need to do to make this happen please?

 

Regards & TIA,

Ian

[FPiette 393]

27 minutes ago, Ian Branch said:

Delphi doesn't like the above. 

You should tell us what is the EXACT error message the compiler give.

 

JobTickets.AfterInsert(DataSet: TDataSet) := JobTicketsAfterInsert(DataSet: TDataSet);

 

It is wrong. Probably it should be :

JobTickets.AfterInsert := JobTicketsAfterInsert;

27 minutes ago, Ian Branch said:

I want to assign a Unit procedure to its AfterInsert event at run time

A "Unit procedure" is not a proper terminology. It is either a simple procedure or a method of object. The later is required.

You should show the declaration of JobTicketsAfterInsert. That's probably where the error is.

Edited November 19, 2022 by FPiette

[Ian Branch 141]

Hi François 

All sorted.  I have it working now.

The thing I was doing wrong seems to be using the same event name that the component would use.

I changed JobTicketsAfterInsert to MyJobTicketsAfterInsert.

Added to the form class

    procedure MyJobTicketsAfterInsert(DataSet: TDataSet);

Changed the procedure to

procedure TdmC.MyJobTicketsAfterInsert(DataSet: TDataSet);
begin
  //
  DataSet.FieldByName('DateIn').AsDateTime := now;
  //
end;

And the assignment to

  JobTickets.AfterInsert := MyJobTicketsAfterInsert;

And it all works as desired.

 

Regards & Tks.

Ian