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;

const sNoName = '<no name>';

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 := sNoName;
  EmployeesLAST_NAME.AsString := sNoName;
  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
  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:	27
Committed:	Tue Apr 14 13:10:23 2015 UTC (9 years, 7 months ago) by tony
Content type:	text/x-pascal
File size:	10276 byte(s)
Log Message:	Committing updates for Release R1-2-3
#	User	Rev	Content
1	tony	23	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			{$R *.lfm}
128
129			uses IB, Unit2, Unit4, Unit5;
130
131	tony	27	const sNoName = '<no name>';
132
133	tony	23	function ExtractDBException(msg: string): string;
134			var Lines: TStringList;
135			begin
136			Lines := TStringList.Create;
137			try
138			Lines.Text := msg;
139			if pos('exception',Lines[0]) = 1 then
140			Result := Lines[2]
141			else
142			Result := msg
143			finally
144			Lines.Free
145			end;
146			end;
147
148			{ TForm1 }
149
150			procedure TForm1.EmployeesSALARYGetText(Sender: TField; var aText: string;
151			DisplayText: Boolean);
152			begin
153			if DisplayText then
154			begin
155			if Sender.IsNUll then
156			aText := ''
157			else
158			aText := FormatFloat('$#,##0.00',Sender.AsFloat)
159			end
160			else
161			aText := Sender.AsString
162			end;
163
164			procedure TForm1.SaveChangesExecute(Sender: TObject);
165			begin
166			Employees.Transaction.Commit
167			end;
168
169			procedure TForm1.SaveChangesUpdate(Sender: TObject);
170			begin
171			(Sender as TAction).Enabled := FDirty
172			end;
173
174			procedure TForm1.TotalsQueryTOTALSALARIESGetText(Sender: TField;
175			var aText: string; DisplayText: Boolean);
176			begin
177			if DisplayText then
178			begin
179			if Sender.IsNUll then
180			aText := ''
181			else
182			aText := FormatFloat('Total Salary Bill = $#,##0.00',Sender.AsFloat)
183			end
184			else
185			aText := Sender.AsString
186			end;
187
188			procedure TForm1.Reopen(Data: PtrInt);
189			begin
190			with IBTransaction1 do
191			if not InTransaction then StartTransaction;
192			Employees.Active := true;
193			end;
194
195			procedure TForm1.AddEmployeeExecute(Sender: TObject);
196			begin
197			Employees.Append;
198			DBControlGrid1.SetFocus;
199			end;
200
201			procedure TForm1.SelectDeptExecute(Sender: TObject);
202			var Dept_No: string;
203			begin
204			if SelectDeptDlg.ShowModal(EmployeesDEPT_KEY_PATH.AsString,Dept_No) = mrOK then
205			begin
206			Employees.Edit;
207			EmployeesDEPT_NO.AsString := Dept_No;
208			try
209			Employees.Post;
210			except
211			Employees.Cancel;
212			raise;
213			end;
214			end;
215			end;
216
217			procedure TForm1.EmployeesAfterPost(DataSet: TDataSet);
218			begin
219			Employees.Refresh
220			end;
221
222			procedure TForm1.EditJobCodeActionUpdate(Sender: TObject);
223			begin
224			(Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0 )
225			end;
226
227			procedure TForm1.EditLocationActionExecute(Sender: TObject);
228			var Country: string;
229			begin
230			Country := EmployeesJOB_COUNTRY.AsString;
231			if EditLocation.ShowModal(EmployeesJOB_GRADE.AsInteger, EmployeesJOB_CODE.AsString,
232			Country) = mrOK then
233			begin
234			Employees.Edit;
235			try
236			EmployeesJOB_COUNTRY.AsString := Country;
237			Employees.Post;
238			except
239			Employees.Cancel;
240			raise
241			end;
242			end;
243			end;
244
245			procedure TForm1.EditJobCodeActionExecute(Sender: TObject);
246			var JobCode: string;
247			begin
248			JobCode := EmployeesJOB_CODE.AsString;
249			if EditJobCode.ShowModal(EmployeesJOB_GRADE.AsInteger,EmployeesJOB_COUNTRY.AsString,
250			JobCode) = mrOK then
251			begin
252			Employees.Edit;
253			try
254			EmployeesJOB_CODE.AsString := JobCode;
255			Employees.Post;
256			except
257			Employees.Cancel;
258			raise
259			end;
260			end;
261			end;
262
263			procedure TForm1.JobGradeDBComboBoxCloseUp(Sender: TObject);
264			begin
265			JobGradeDBComboBox.EditingDone; //See http://bugs.freepascal.org/view.php?id=27186
266			end;
267
268			procedure TForm1.BeforeDateChange(Sender: TObject);
269			begin
270			Employees.Active := false;
271			Employees.Active := true
272			end;
273
274			procedure TForm1.CancelChangesExecute(Sender: TObject);
275			begin
276			Employees.Transaction.Rollback
277			end;
278
279			procedure TForm1.DeleteEmployeeExecute(Sender: TObject);
280			begin
281			if MessageDlg(
282			Format('Remove %s from Employee List?',[Employees.FieldByName('Full_Name').AsString]),
283			mtConfirmation,[mbYes,mbNo],0) = mrYes then
284			Employees.Delete;
285			DBControlGrid1.SetFocus;
286			end;
287
288			procedure TForm1.EditEmployeeUpdate(Sender: TObject);
289			begin
290			(Sender as TAction).Enabled := Employees.Active and (Employees.RecordCount > 0)
291			end;
292
293			procedure TForm1.EmployeesAfterInsert(DataSet: TDataSet);
294			begin
295			EmployeesJOB_COUNTRY.AsString := 'USA';
296			EmployeesJOB_CODE.AsString := 'SRep';
297			EmployeesJOB_GRADE.AsInteger := 4;
298			EmployeesSALARY.AsCurrency := 20000;
299	tony	27	EmployeesFIRST_NAME.AsString := sNoName;
300			EmployeesLAST_NAME.AsString := sNoName;
301	tony	23	EmployeesHIRE_DATE.AsDateTime := now;
302			EmployeesDEPT_NO.AsString := '000';
303			FDirty := true;
304			end;
305
306			procedure TForm1.EmployeesAfterOpen(DataSet: TDataSet);
307			begin
308			TotalsQuery.Active := true;
309			DBControlGrid1.SetFocus;
310			end;
311
312			procedure TForm1.EmployeesBeforeClose(DataSet: TDataSet);
313			begin
314			TotalsQuery.Active := false
315			end;
316
317			procedure TForm1.EmployeesBeforeOpen(DataSet: TDataSet);
318			begin
319			if BeforeDate.Date > 0 then
320			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE < :BeforeDate');
321			if AfterDate.Date > 0 then
322			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('HIRE_DATE > :AfterDate');
323
324			case SalaryRange.ItemIndex of
325			1:
326			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary < 40000');
327			2:
328			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 40000 and Salary < 100000');
329			3:
330			(DataSet as TIBParserDataSet).Parser.Add2WhereClause('Salary >= 100000');
331			end;
332
333
334
335			{Parameter value must be set after all SQL changes have been made}
336			if BeforeDate.Date > 0 then
337			(DataSet as TIBParserDataSet).ParamByName('BeforeDate').AsDateTime := BeforeDate.Date;
338			if AfterDate.Date > 0 then
339			(DataSet as TIBParserDataSet).ParamByName('AfterDate').AsDateTime := AfterDate.Date;
340
341			end;
342
343			procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
344			begin
345			FClosing := true;
346			if IBTransaction1.InTransaction then
347			IBTransaction1.Commit;
348			end;
349
350			procedure TForm1.FormShow(Sender: TObject);
351			begin
352			repeat
353			try
354			IBDatabase1.Connected := true;
355			except
356			on E:EIBClientError do
357			begin
358			Close;
359			Exit
360			end;
361			On E:Exception do
362			MessageDlg(E.Message,mtError,[mbOK],0);
363			end;
364			until IBDatabase1.Connected;
365			Reopen(0);
366			end;
367
368			procedure TForm1.EmployeesAfterDelete(DataSet: TDataSet);
369			begin
370			FDirty := true
371			end;
372
373			procedure TForm1.EmployeesAfterTransactionEnd(Sender: TObject);
374			begin
375			FDirty := false;
376			if not FClosing then
377			Application.QueueAsyncCall(@Reopen,0)
378			end;
379
380			procedure TForm1.EmployeesPostError(DataSet: TDataSet; E: EDatabaseError;
381			var DataAction: TDataAction);
382			begin
383			if E is EIBError then
384			begin
385			MessageDlg(ExtractDBException(EIBError(E).message),mtError,[mbOK],0);
386			DataSet.Cancel;
387			DataAction := daAbort
388			end;
389			end;
390
391			end.
392