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/ Delphi Magazine Collection 2001 / Delphi Magazine Collection 20001 (2001).iso / DISKS / Issue53 / DataMod / BusinessLogic / BusinessLogicDM.pas < prev    next >
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Pascal/Delphi Source File  |  1999-11-27  |  717 b   |  35 lines
  1. unit BusinessLogicDM;
  2.  
  3. interface
  4.  
  5. uses
  6.   Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  7.   Db, DBTables;
  8.  
  9. type
  10.   TDataModule1 = class(TDataModule)
  11.     Table1: TTable;
  12.     DataSource1: TDataSource;
  13.     procedure Table1BeforePost(DataSet: TDataSet);
  14.   private
  15.     { Private declarations }
  16.   public
  17.     { Public declarations }
  18.   end;
  19.  
  20. var
  21.   DataModule1: TDataModule1;
  22.  
  23. implementation
  24.  
  25. {$R *.DFM}
  26.  
  27. procedure TDataModule1.Table1BeforePost(DataSet: TDataSet);
  28. begin
  29.   if (Table1.FieldByName('CITY').AsString='Bristol') and
  30.   not (Table1.FieldByName('STATE').AsString='South Glos') then
  31.     raise Exception.Create('Bristol is in South Glocestershire');
  32. end;
  33.  
  34. end.
  35.