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I don't get the Qreport OnNeedData...

Posted on 2000-02-19
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Last Modified: 2012-05-04
Hi, I have a TStringList which I want to print in a report. One subdetailline per String in the List.
So, I figured I have to use the OnNeedData event of the subdetail to print each rule.
No I have the following code:

procedure TLCRepForm.HygOpdtNeedData(Sender: TObject;
  var MoreData: Boolean);
begin
  if HygList.Count > ListCount then
begin
  HygOp.Caption := GebouwList.Strings[ListCount];
  Inc(ListCount);
  MoreData := GebouwList.Count > ListCount ;
end;
end;

where the HygOp is a label on my subdetailrecord. I have the dataset of the subdetail empty..
I can't figure out what I'm doing wrong.. It just print nothing...

Thanks,

Lizzzard
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Question by:lizzzard
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9 Comments
 
LVL 8

Expert Comment

by:ZifNab
ID: 2538139
lizzard,

have you set the ListCount to zero?
Why do you use a subdetail and not a detail? If you use a subdetail, then how is it related to the detail?

here is code that works (with ListView and Detailband):

unit Unit2;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ExtCtrls, QuickRpt, Qrctrls;

  type
   TfrmNeedData = class(TForm)
     QuickRep1: TQuickRep;
     QRLabel1: TQRLabel;
     TitleBand1: TQRBand;
     DetailBand1: TQRBand;
     procedure FormCreate(Sender: TObject);
     procedure QuickRep1BeforePrint(Sender: TCustomQuickRep;
        var PrintReport: Boolean);
     procedure QuickRep1NeedData(Sender: TObject; var MoreData: Boolean);
     private
      { Private declarations }
      SomeList: TStringlist;
      CurrentIndex: integer;
     public
      { Public declarations }
     end;

   var
    frmNeedData: TfrmNeedData;

   implementation

uses Unit1;

                      {$R *.DFM}

 procedure TfrmNeedData.FormCreate(Sender: TObject);
   var
    i: integer;
 begin
 end;

 procedure TfrmNeedData.QuickRep1BeforePrint(Sender: TCustomQuickRep;
   var PrintReport: Boolean);
 begin
   // You must reset your data in the BeforePrint event
   // or when you print from the preview, the report will
   // start with the last value(s)
   CurrentIndex := 0;
 end;

 procedure TfrmNeedData.QuickRep1NeedData(Sender: TObject;
   var MoreData: Boolean);
 begin
   // If MoreData is true, then QuickReport will print
   // another detail band.  When you set it to false,
   // the report is done.

   MoreData := (CurrentIndex <    form1.ListView1.Items.Count);

   if MoreData then
   begin
    QRLabel1.Caption := form1.ListView1.Items[CurrentIndex].caption;
    // Here's how to set the progress bar
    QuickRep1.QRPrinter.Progress := (Longint(CurrentIndex) * 100) div form1.ListView1.ITems.Count;
   end
   else
    QuickRep1.QRPrinter.Progress := 100;
   Inc(CurrentIndex);
  end;

end.

Zif.

0
 
LVL 8

Expert Comment

by:ZifNab
ID: 2538153
just replace the listview with your stringlist and it should work fine.

Zif.
0
 

Author Comment

by:lizzzard
ID: 2538164
Hi, ZiF!!!!

Long time no see! How's it hanging?

Thanks for you comment..
I use a subdetail because it is a subdetail...
I want to report from a master/detail recorset, in which one of the  fields of the detail is a DBMemo.
I want to add some comment text to each line of the memo (which I have assigned to a TStringList for my convience)...
And yes.. I have set ListCount to 0... Nice try though..

I will try your code in my report.

Regards and all the best from Holland,

Lizzzard
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LVL 8

Expert Comment

by:ZifNab
ID: 2538388
Hi lizzzard,

all things fine here (and in Belgium too :-) ).Mmmm, can you test somehow if the subdetail band is used during report time?

Zif.
0
 

Author Comment

by:lizzzard
ID: 2538568
Zif,

I tried your solution, and it worked But I don't get what I'm doing wrong in my code..
Now I have another problem.. See my new question.. hehehe

Regards,

Lizzard...
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Author Comment

by:lizzzard
ID: 2538569
PS

do you want the points for your comment???
0
 
LVL 8

Accepted Solution

by:
ZifNab earned 50 total points
ID: 2538642
great that it works. :-)

I don't get notifications when comments are given :-( that's why I'm so slow in reaction to your messages. Sorry !

you can publish your code and maybe I can find the problem which you're overlooking?

Zif.
0
 

Author Comment

by:lizzzard
ID: 2538727
It's OK with your code, Zif..  I have to finish this project soon,  So if it works, it works. I'm not normally like that.. Right now I have hellhounds on my trail..

Thanks anyway.
0
 

Author Comment

by:lizzzard
ID: 2545232
Sorry Zif...

I saw I forgot to grade you...
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