current record number in ttable?

I want to put a label on a form that says

 record ?? of ??

I can get the second bit by the recordcount property, but how do I get the first bit. How can I get the number of the current record in a ttable.

I am not applying any secondary indexes, ranges etc, so its just a straight vanilla table.
mdoyleAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

ahalyaCommented:
You can use the RecNo property of a table (if you are using D2 or higher & and if your table is a paradox/dbase one) the following works:

label1.caption := 'Record ' + IntToStr(Table1.RecNo) + ' of '+ IntToStr(Table1.RecordCount);

if you are using Delphi 1 the following function [from Borland TIs] work by using BDE functions:

function RecNo(ATable: TTable): LongInt;
  var
    R: RECProps;
    rslt: DbiResult;
    Error: array [0..255] of Char;
  begin
    ATable.UpdateCursorPos;
    rslt := DbiGetRecord(ATable.Handle, dbiNoLock, nil, @R);
    if rslt = DBIERR_NONE then
      Result := R.iPhyRecNum
    else begin
      DbiGetErrorString(rslt, Error);
      ShowMessage('Error Finding Record No: ' + StrPas(Error));
      Result := 0;
    end;
  end;
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
mdoyleAuthor Commented:
I am using Delphi 1.

The solution you provided looks like it will do the trick, but I can't get it to work. What is the Borland TIs ??

Thanks
0
ahalyaCommented:
Here is an example code that works using the above function:
it has a TTable, TDatasource, TDBNaviagator & TDBGrid on a Form.
Note the "uses BDE" in implementation. [TI is Technical Information, btw]

Don't forget to create an "OnDataChanged" event for the datasource.

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls,
  Forms, Dialogs,StdCtrls, DB, DBTables, ExtCtrls, DBCtrls,
  Grids, DBGrids;

type
  TForm1 = class(TForm)
    DBGrid1: TDBGrid;
    DBNavigator1: TDBNavigator;
    DataSource1: TDataSource;
    Table1: TTable;
    Label1: TLabel;
    procedure DataSource1DataChange(Sender: TObject; Field: TField);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

uses BDE;

{$R *.DFM}
function RecNo(ATable: TTable): LongInt;

var

R: RECProps;
rslt: DbiResult;
Error: array [0..255] of Char;

begin
ATable.UpdateCursorPos;
rslt := DbiGetRecord(ATable.Handle, dbiNoLock, nil, @R);
if rslt = DBIERR_NONE then
   Result := R.iPhyRecNum
else begin
   DbiGetErrorString(rslt, Error);
   ShowMessage('Error Finding Record No: ' + StrPas(Error));
   Result := 0;
   end;
end;

procedure TForm1.DataSource1DataChange(Sender: TObject; Field: TField);
begin
Label1.Caption := 'Record ' + IntToStr(RecNo(Table1)) + ' of ' + IntToStr(Table1.RecordCount);
end;

procedure TForm1.FormCreate(Sender: TObject);

begin
Table1.DatabaseName := 'DBDEMOS';
Table1.TableName    := 'clients.dbf';
DataSource1.Dataset := Table1;
DBGrid1.Datasource  := DataSource1;
DBNavigator1.DataSource := DataSource1;
Table1.open;
end;

end.

0
Cloud Class® Course: Certified Penetration Testing

This CPTE Certified Penetration Testing Engineer course covers everything you need to know about becoming a Certified Penetration Testing Engineer. Career Path: Professional roles include Ethical Hackers, Security Consultants, System Administrators, and Chief Security Officers.

mdoyleAuthor Commented:
Sorry to be a bit slow but it's this bit I don't get.

uses BDE;

I did a search for BDE.* and I can't find this library anywhere on my machine. Is it supposed to ship with delphi 1. If so, I must have lost it somewhere along the line.

Where can I get hold of a copy.

Thanks

Martin.
0
ahalyaCommented:
Hi Martin,

BDE was an alias to DbiProcs, DbiTypes & DbiErrs. [sorry it was my mistake. i checked the code on D2 not D1]

In Delphi 1 you shoud use
uses DbiProcs, DbiTypes, DbiErrs;

0
ahalyaCommented:
Hi Mdoyle,

not that i care, but just wondering ?

what kind of an answer would have "completely" satisfied you (and made you give an "A" ?)

0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.