examples/dbcontrolgrid/unit1.pas

unit Unit1; 

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, DBGrids,
  StdCtrls, ActnList, EditBtn, DbCtrls, ExtCtrls, Buttons, IBDatabase, IBQuery,
  IBCustomDataSet, IBUpdateSQL, IBDynamicGrid, IBLookupComboEditBox,
  db, DBExtCtrls, DBControlGrid, types;

type

  { TForm1 }

  TForm1 = class(TForm)
    EditLocationAction: TAction;
    EditJobCodeAction: TAction;
    DBEdit6: TDBEdit;
    DBControlGrid1: TDBControlGrid;
    DBEdit7: TDBEdit;
    DBEdit8: TDBEdit;
    DBText1: TDBText;
    EmployeesDEPT_KEY_PATH: TIBStringField;
    EmployeesDEPT_PATH: TIBStringField;
    EmployeesJOB_TITLE: TIBStringField;
    SelectDept: TAction;
    Button4: TButton;
    Button5: TButton;
    CancelChanges: TAction;
    SalaryRange: TComboBox;
    BeforeDate: TDateEdit;
    AfterDate: TDateEdit;
    DBEdit1: TDBEdit;
    DBEdit2: TDBEdit;
    DBEdit3: TDBEdit;
    DBEdit4: TDBEdit;
    DBEdit5: TDBEdit;
    Employees: TIBDataSet;
    EmployeesDEPT_NO: TIBStringField;
    EmployeesEMP_NO: TSmallintField;
    EmployeesFIRST_NAME: TIBStringField;
    EmployeesFULL_NAME: TIBStringField;
    EmployeesHIRE_DATE: TDateTimeField;
    EmployeesJOB_CODE: TIBStringField;
    EmployeesJOB_COUNTRY: TIBStringField;
    EmployeesJOB_GRADE: TSmallintField;
    EmployeesLAST_NAME: TIBStringField;
    EmployeesPHONE_EXT: TIBStringField;
    EmployeesSALARY: TIBBCDField;
    IBDateEdit1: TDBDateEdit;
    JobGradeDBComboBox: TDBComboBox;
    Label10: TLabel;
    Label11: TLabel;
    Label12: TLabel;
    Label13: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    Label9: TLabel;
    Panel1: TPanel;
    Panel2: TPanel;
    EmployeeEditorPanel: TPanel;
    SpeedButton1: TSpeedButton;
    SpeedButton2: TSpeedButton;
    SpeedButton3: TSpeedButton;
    TotalsQuery: TIBQuery;
    TotalsQueryTOTALSALARIES: TIBBCDField;
    Label1: TLabel;
    Label2: TLabel;
    SaveChanges: TAction;
    DeleteEmployee: TAction;
    EditEmployee: TAction;
    AddEmployee: TAction;
    ActionList1: TActionList;
    Button1: TButton;
    Button3: TButton;
    EmployeeSource: TDataSource;
    IBDatabase1: TIBDatabase;
    IBTransaction1: TIBTransaction;
    TotalsSource: TDataSource;
    procedure EditJobCodeActionExecute(Sender: TObject);
    procedure EditJobCodeActionUpdate(Sender: TObject);
    procedure EditLocationActionExecute(Sender: TObject);
    procedure EmployeesAfterPost(DataSet: TDataSet);
    procedure JobGradeDBComboBoxCloseUp(Sender: TObject);
    procedure SelectDeptExecute(Sender: TObject);
    procedure AddEmployeeExecute(Sender: TObject);
    procedure BeforeDateChange(Sender: TObject);
    procedure CancelChangesExecute(Sender: TObject);
    procedure DeleteEmployeeExecute(Sender: TObject);
    procedure EditEmployeeUpdate(Sender: TObject);
    procedure EmployeesAfterInsert(DataSet: TDataSet);
    procedure EmployeesAfterOpen(DataSet: TDataSet);
    procedure EmployeesBeforeClose(DataSet: TDataSet);
    procedure EmployeesBeforeOpen(DataSet: TDataSet);
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormShow(Sender: TObject);
    procedure EmployeesAfterDelete(DataSet: TDataSet);
    procedure EmployeesAfterTransactionEnd(Sender: TObject);
    procedure EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
      var DataAction: TDataAction);
    procedure EmployeesSALARYGetText(Sender: TField; var aText: string;
      DisplayText: Boolean);
    procedure SaveChangesExecute(Sender: TObject);
    procedure SaveChangesUpdate(Sender: TObject);
    procedure TotalsQueryTOTALSALARIESGetText(Sender: TField;
      var aText: string; DisplayText: Boolean);
  private
    { private declarations }
    FDirty: boolean;
    FClosing: boolean;
    procedure Reopen(Data: PtrInt);
  public
    { public declarations }
  end; 

var
  Form1: TForm1; 

implementation

{$R *.lfm}

uses IB, Unit2, Unit4, Unit5;

function ExtractDBException(msg: string): string;
var Lines: TStringList;
begin
     Lines := TStringList.Create;
     try
       Lines.Text := msg;
       if pos('exception',Lines[0]) = 1 then
         Result := Lines[2]
       else
         Result := msg
     finally
       Lines.Free
     end;
end;

{ TForm1 }

procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
  DisplayText: Boolean);
begin
  if DisplayText then
  begin
    if Sender.IsNUll then
      aText := ''
    else
      aText := FormatFloat('$#,##0.00',Sender.AsFloat)
  end
  else
    aText := Sender.AsString
end;

procedure TForm1.SaveChangesExecute(Sender: TObject);
begin
  Employees.Transaction.Commit
end;

procedure TForm1.SaveChangesUpdate(Sender: TObject);
begin
  (Sender as TAction).Enabled := FDirty
end;

procedure TForm1.TotalsQueryTOTALSALARIESGetText(Sender: TField;
  var aText: string; DisplayText: Boolean);
begin
  if DisplayText then
  begin
    if Sender.IsNUll then
      aText := ''
    else
      aText := FormatFloat('Total Salary Bill = $#,##0.00',Sender.AsFloat)
  end
  else
    aText := Sender.AsString
end;

procedure TForm1.Reopen(Data: PtrInt);
begin
  with IBTransaction1 do
    if not InTransaction then StartTransaction;
  Employees.Active := true;
end;

procedure TForm1.AddEmployeeExecute(Sender: TObject);
begin
  Employees.Append;
  DBControlGrid1.SetFocus;
end;

procedure TForm1.SelectDeptExecute(Sender: TObject);
var Dept_No: string;
begin
  if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,Dept_No) = mrOK then
  begin
    Employees.Edit;
    EmployeesDEPT_NO.AsString := Dept_No;
    try
      Employees.Post;
    except
      Employees.Cancel;
      raise;
    end;
  end;
end;

procedure TForm1.EmployeesAfterPost(DataSet: TDataSet);
begin
  Employees.Refresh
end;

procedure TForm1.EditJobCodeActionUpdate(Sender: TObject);
begin
  (Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0 )
end;

procedure TForm1.EditLocationActionExecute(Sender: TObject);
var Country: string;
begin
  Country := EmployeesJOB_COUNTRY.AsString;
  if EditLocation.ShowModal(EmployeesJOB_GRADE.AsInteger, EmployeesJOB_CODE.AsString,
     Country) = mrOK then
     begin
       Employees.Edit;
       try
         EmployeesJOB_COUNTRY.AsString := Country;
         Employees.Post;
       except
         Employees.Cancel;
         raise
       end;
     end;
end;

procedure TForm1.EditJobCodeActionExecute(Sender: TObject);
var JobCode: string;
begin
  JobCode := EmployeesJOB_CODE.AsString;
  if EditJobCode.ShowModal(EmployeesJOB_GRADE.AsInteger,EmployeesJOB_COUNTRY.AsString,
    JobCode) = mrOK then
    begin
      Employees.Edit;
      try
        EmployeesJOB_CODE.AsString := JobCode;
        Employees.Post;
      except
        Employees.Cancel;
        raise
      end;
    end;
end;

procedure TForm1.JobGradeDBComboBoxCloseUp(Sender: TObject);
begin
  JobGradeDBComboBox.EditingDone; //See http://bugs.freepascal.org/view.php?id=27186
end;

procedure TForm1.BeforeDateChange(Sender: TObject);
begin
  Employees.Active := false;
  Employees.Active := true
end;

procedure TForm1.CancelChangesExecute(Sender: TObject);
begin
  Employees.Transaction.Rollback
end;

procedure TForm1.DeleteEmployeeExecute(Sender: TObject);
begin
  if MessageDlg(
    Format('Remove %s from Employee List?',[Employees.FieldByName('Full_Name').AsString]),
    mtConfirmation,[mbYes,mbNo],0) = mrYes then
    Employees.Delete;
    DBControlGrid1.SetFocus;
end;

procedure TForm1.EditEmployeeUpdate(Sender: TObject);
begin
  (Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0)
end;

procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
begin
  EmployeesJOB_COUNTRY.AsString := 'USA';
  EmployeesJOB_CODE.AsString := 'SRep';
  EmployeesJOB_GRADE.AsInteger := 4;
  EmployeesSALARY.AsCurrency := 20000;
  EmployeesFIRST_NAME.AsString := '<no name>';
  EmployeesLAST_NAME.AsString := '<no name>';
  EmployeesHIRE_DATE.AsDateTime := now;
  EmployeesDEPT_NO.AsString := '000';
  FDirty := true;
end;

procedure TForm1.EmployeesAfterOpen(DataSet: TDataSet);
begin
  TotalsQuery.Active := true;
  DBControlGrid1.SetFocus;
end;

procedure TForm1.EmployeesBeforeClose(DataSet: TDataSet);
begin
  with DataSet do
    if State in [dsInsert,dsEdit] then
    try
     Post;
    except
      Cancel;
      raise;
    end;
  TotalsQuery.Active := false
end;

procedure TForm1.EmployeesBeforeOpen(DataSet: TDataSet);
begin
  if BeforeDate.Date > 0 then
     (DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE < :BeforeDate');
  if AfterDate.Date > 0 then
     (DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE > :AfterDate');

  case SalaryRange.ItemIndex of
  1:
    (DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary < 40000');
  2:
    (DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 40000 and Salary < 100000');
  3:
    (DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 100000');
  end;


  {Parameter value must be set after all SQL changes have been made}
  if BeforeDate.Date > 0 then
     (DataSet as TIBParserDataSet).ParamByName('BeforeDate').AsDateTime := BeforeDate.Date;
  if AfterDate.Date > 0 then
   (DataSet as TIBParserDataSet).ParamByName('AfterDate').AsDateTime := AfterDate.Date;

end;

procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
begin
  FClosing := true;
  if IBTransaction1.InTransaction then
    IBTransaction1.Commit;
end;

procedure TForm1.FormShow(Sender: TObject);
begin
  repeat
    try
      IBDatabase1.Connected := true;
    except
     on E:EIBClientError do
      begin
        Close;
        Exit
      end;
    On E:Exception do
     MessageDlg(E.Message,mtError,[mbOK],0);
    end;
  until IBDatabase1.Connected;
  Reopen(0);
end;

procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
begin
  FDirty := true
end;

procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
begin
  FDirty := false;
  if not FClosing then
    Application.QueueAsyncCall(@Reopen,0)
end;

procedure TForm1.EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
  var DataAction: TDataAction);
begin
  if E is EIBError then
   begin
       MessageDlg(ExtractDBException(EIBError(E).message),mtError,[mbOK],0);
       DataSet.Cancel;
       DataAction  := daAbort
   end;
end;

end.

Revision:	23
Committed:	Fri Mar 13 10:26:52 2015 UTC (9 years, 8 months ago) by tony
Content type:	text/x-pascal
File size:	10377 byte(s)
Log Message:	Committing updates for Release R1-2-1
#	Content
1	unit Unit1;
2
3	{$mode objfpc}{$H+}
4
5	interface
6
7	uses
8	Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, DBGrids,
9	StdCtrls, ActnList, EditBtn, DbCtrls, ExtCtrls, Buttons, IBDatabase, IBQuery,
10	IBCustomDataSet, IBUpdateSQL, IBDynamicGrid, IBLookupComboEditBox,
11	db, DBExtCtrls, DBControlGrid, types;
12
13	type
14
15	{ TForm1 }
16
17	TForm1 = class(TForm)
18	EditLocationAction: TAction;
19	EditJobCodeAction: TAction;
20	DBEdit6: TDBEdit;
21	DBControlGrid1: TDBControlGrid;
22	DBEdit7: TDBEdit;
23	DBEdit8: TDBEdit;
24	DBText1: TDBText;
25	EmployeesDEPT_KEY_PATH: TIBStringField;
26	EmployeesDEPT_PATH: TIBStringField;
27	EmployeesJOB_TITLE: TIBStringField;
28	SelectDept: TAction;
29	Button4: TButton;
30	Button5: TButton;
31	CancelChanges: TAction;
32	SalaryRange: TComboBox;
33	BeforeDate: TDateEdit;
34	AfterDate: TDateEdit;
35	DBEdit1: TDBEdit;
36	DBEdit2: TDBEdit;
37	DBEdit3: TDBEdit;
38	DBEdit4: TDBEdit;
39	DBEdit5: TDBEdit;
40	Employees: TIBDataSet;
41	EmployeesDEPT_NO: TIBStringField;
42	EmployeesEMP_NO: TSmallintField;
43	EmployeesFIRST_NAME: TIBStringField;
44	EmployeesFULL_NAME: TIBStringField;
45	EmployeesHIRE_DATE: TDateTimeField;
46	EmployeesJOB_CODE: TIBStringField;
47	EmployeesJOB_COUNTRY: TIBStringField;
48	EmployeesJOB_GRADE: TSmallintField;
49	EmployeesLAST_NAME: TIBStringField;
50	EmployeesPHONE_EXT: TIBStringField;
51	EmployeesSALARY: TIBBCDField;
52	IBDateEdit1: TDBDateEdit;
53	JobGradeDBComboBox: TDBComboBox;
54	Label10: TLabel;
55	Label11: TLabel;
56	Label12: TLabel;
57	Label13: TLabel;
58	Label3: TLabel;
59	Label4: TLabel;
60	Label5: TLabel;
61	Label6: TLabel;
62	Label7: TLabel;
63	Label8: TLabel;
64	Label9: TLabel;
65	Panel1: TPanel;
66	Panel2: TPanel;
67	EmployeeEditorPanel: TPanel;
68	SpeedButton1: TSpeedButton;
69	SpeedButton2: TSpeedButton;
70	SpeedButton3: TSpeedButton;
71	TotalsQuery: TIBQuery;
72	TotalsQueryTOTALSALARIES: TIBBCDField;
73	Label1: TLabel;
74	Label2: TLabel;
75	SaveChanges: TAction;
76	DeleteEmployee: TAction;
77	EditEmployee: TAction;
78	AddEmployee: TAction;
79	ActionList1: TActionList;
80	Button1: TButton;
81	Button3: TButton;
82	EmployeeSource: TDataSource;
83	IBDatabase1: TIBDatabase;
84	IBTransaction1: TIBTransaction;
85	TotalsSource: TDataSource;
86	procedure EditJobCodeActionExecute(Sender: TObject);
87	procedure EditJobCodeActionUpdate(Sender: TObject);
88	procedure EditLocationActionExecute(Sender: TObject);
89	procedure EmployeesAfterPost(DataSet: TDataSet);
90	procedure JobGradeDBComboBoxCloseUp(Sender: TObject);
91	procedure SelectDeptExecute(Sender: TObject);
92	procedure AddEmployeeExecute(Sender: TObject);
93	procedure BeforeDateChange(Sender: TObject);
94	procedure CancelChangesExecute(Sender: TObject);
95	procedure DeleteEmployeeExecute(Sender: TObject);
96	procedure EditEmployeeUpdate(Sender: TObject);
97	procedure EmployeesAfterInsert(DataSet: TDataSet);
98	procedure EmployeesAfterOpen(DataSet: TDataSet);
99	procedure EmployeesBeforeClose(DataSet: TDataSet);
100	procedure EmployeesBeforeOpen(DataSet: TDataSet);
101	procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
102	procedure FormShow(Sender: TObject);
103	procedure EmployeesAfterDelete(DataSet: TDataSet);
104	procedure EmployeesAfterTransactionEnd(Sender: TObject);
105	procedure EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
106	var DataAction: TDataAction);
107	procedure EmployeesSALARYGetText(Sender: TField; var aText: string;
108	DisplayText: Boolean);
109	procedure SaveChangesExecute(Sender: TObject);
110	procedure SaveChangesUpdate(Sender: TObject);
111	procedure TotalsQueryTOTALSALARIESGetText(Sender: TField;
112	var aText: string; DisplayText: Boolean);
113	private
114	{ private declarations }
115	FDirty: boolean;
116	FClosing: boolean;
117	procedure Reopen(Data: PtrInt);
118	public
119	{ public declarations }
120	end;
121
122	var
123	Form1: TForm1;
124
125	implementation
126
127	{$R *.lfm}
128
129	uses IB, Unit2, Unit4, Unit5;
130
131	function ExtractDBException(msg: string): string;
132	var Lines: TStringList;
133	begin
134	Lines := TStringList.Create;
135	try
136	Lines.Text := msg;
137	if pos('exception',Lines[0]) = 1 then
138	Result := Lines[2]
139	else
140	Result := msg
141	finally
142	Lines.Free
143	end;
144	end;
145
146	{ TForm1 }
147
148	procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
149	DisplayText: Boolean);
150	begin
151	if DisplayText then
152	begin
153	if Sender.IsNUll then
154	aText := ''
155	else
156	aText := FormatFloat('$#,##0.00',Sender.AsFloat)
157	end
158	else
159	aText := Sender.AsString
160	end;
161
162	procedure TForm1.SaveChangesExecute(Sender: TObject);
163	begin
164	Employees.Transaction.Commit
165	end;
166
167	procedure TForm1.SaveChangesUpdate(Sender: TObject);
168	begin
169	(Sender as TAction).Enabled := FDirty
170	end;
171
172	procedure TForm1.TotalsQueryTOTALSALARIESGetText(Sender: TField;
173	var aText: string; DisplayText: Boolean);
174	begin
175	if DisplayText then
176	begin
177	if Sender.IsNUll then
178	aText := ''
179	else
180	aText := FormatFloat('Total Salary Bill = $#,##0.00',Sender.AsFloat)
181	end
182	else
183	aText := Sender.AsString
184	end;
185
186	procedure TForm1.Reopen(Data: PtrInt);
187	begin
188	with IBTransaction1 do
189	if not InTransaction then StartTransaction;
190	Employees.Active := true;
191	end;
192
193	procedure TForm1.AddEmployeeExecute(Sender: TObject);
194	begin
195	Employees.Append;
196	DBControlGrid1.SetFocus;
197	end;
198
199	procedure TForm1.SelectDeptExecute(Sender: TObject);
200	var Dept_No: string;
201	begin
202	if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,Dept_No) = mrOK then
203	begin
204	Employees.Edit;
205	EmployeesDEPT_NO.AsString := Dept_No;
206	try
207	Employees.Post;
208	except
209	Employees.Cancel;
210	raise;
211	end;
212	end;
213	end;
214
215	procedure TForm1.EmployeesAfterPost(DataSet: TDataSet);
216	begin
217	Employees.Refresh
218	end;
219
220	procedure TForm1.EditJobCodeActionUpdate(Sender: TObject);
221	begin
222	(Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0 )
223	end;
224
225	procedure TForm1.EditLocationActionExecute(Sender: TObject);
226	var Country: string;
227	begin
228	Country := EmployeesJOB_COUNTRY.AsString;
229	if EditLocation.ShowModal(EmployeesJOB_GRADE.AsInteger, EmployeesJOB_CODE.AsString,
230	Country) = mrOK then
231	begin
232	Employees.Edit;
233	try
234	EmployeesJOB_COUNTRY.AsString := Country;
235	Employees.Post;
236	except
237	Employees.Cancel;
238	raise
239	end;
240	end;
241	end;
242
243	procedure TForm1.EditJobCodeActionExecute(Sender: TObject);
244	var JobCode: string;
245	begin
246	JobCode := EmployeesJOB_CODE.AsString;
247	if EditJobCode.ShowModal(EmployeesJOB_GRADE.AsInteger,EmployeesJOB_COUNTRY.AsString,
248	JobCode) = mrOK then
249	begin
250	Employees.Edit;
251	try
252	EmployeesJOB_CODE.AsString := JobCode;
253	Employees.Post;
254	except
255	Employees.Cancel;
256	raise
257	end;
258	end;
259	end;
260
261	procedure TForm1.JobGradeDBComboBoxCloseUp(Sender: TObject);
262	begin
263	JobGradeDBComboBox.EditingDone; //See http://bugs.freepascal.org/view.php?id=27186
264	end;
265
266	procedure TForm1.BeforeDateChange(Sender: TObject);
267	begin
268	Employees.Active := false;
269	Employees.Active := true
270	end;
271
272	procedure TForm1.CancelChangesExecute(Sender: TObject);
273	begin
274	Employees.Transaction.Rollback
275	end;
276
277	procedure TForm1.DeleteEmployeeExecute(Sender: TObject);
278	begin
279	if MessageDlg(
280	Format('Remove %s from Employee List?',[Employees.FieldByName('Full_Name').AsString]),
281	mtConfirmation,[mbYes,mbNo],0) = mrYes then
282	Employees.Delete;
283	DBControlGrid1.SetFocus;
284	end;
285
286	procedure TForm1.EditEmployeeUpdate(Sender: TObject);
287	begin
288	(Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0)
289	end;
290
291	procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
292	begin
293	EmployeesJOB_COUNTRY.AsString := 'USA';
294	EmployeesJOB_CODE.AsString := 'SRep';
295	EmployeesJOB_GRADE.AsInteger := 4;
296	EmployeesSALARY.AsCurrency := 20000;
297	EmployeesFIRST_NAME.AsString := '<no name>';
298	EmployeesLAST_NAME.AsString := '<no name>';
299	EmployeesHIRE_DATE.AsDateTime := now;
300	EmployeesDEPT_NO.AsString := '000';
301	FDirty := true;
302	end;
303
304	procedure TForm1.EmployeesAfterOpen(DataSet: TDataSet);
305	begin
306	TotalsQuery.Active := true;
307	DBControlGrid1.SetFocus;
308	end;
309
310	procedure TForm1.EmployeesBeforeClose(DataSet: TDataSet);
311	begin
312	with DataSet do
313	if State in [dsInsert,dsEdit] then
314	try
315	Post;
316	except
317	Cancel;
318	raise;
319	end;
320	TotalsQuery.Active := false
321	end;
322
323	procedure TForm1.EmployeesBeforeOpen(DataSet: TDataSet);
324	begin
325	if BeforeDate.Date > 0 then
326	(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE < :BeforeDate');
327	if AfterDate.Date > 0 then
328	(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE > :AfterDate');
329
330	case SalaryRange.ItemIndex of
331	1:
332	(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary < 40000');
333	2:
334	(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 40000 and Salary < 100000');
335	3:
336	(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 100000');
337	end;
338
339
340
341	{Parameter value must be set after all SQL changes have been made}
342	if BeforeDate.Date > 0 then
343	(DataSet as TIBParserDataSet).ParamByName('BeforeDate').AsDateTime := BeforeDate.Date;
344	if AfterDate.Date > 0 then
345	(DataSet as TIBParserDataSet).ParamByName('AfterDate').AsDateTime := AfterDate.Date;
346
347	end;
348
349	procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
350	begin
351	FClosing := true;
352	if IBTransaction1.InTransaction then
353	IBTransaction1.Commit;
354	end;
355
356	procedure TForm1.FormShow(Sender: TObject);
357	begin
358	repeat
359	try
360	IBDatabase1.Connected := true;
361	except
362	on E:EIBClientError do
363	begin
364	Close;
365	Exit
366	end;
367	On E:Exception do
368	MessageDlg(E.Message,mtError,[mbOK],0);
369	end;
370	until IBDatabase1.Connected;
371	Reopen(0);
372	end;
373
374	procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
375	begin
376	FDirty := true
377	end;
378
379	procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
380	begin
381	FDirty := false;
382	if not FClosing then
383	Application.QueueAsyncCall(@Reopen,0)
384	end;
385
386	procedure TForm1.EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
387	var DataAction: TDataAction);
388	begin
389	if E is EIBError then
390	begin
391	MessageDlg(ExtractDBException(EIBError(E).message),mtError,[mbOK],0);
392	DataSet.Cancel;
393	DataAction := daAbort
394	end;
395	end;
396
397	end.
398