restricting dataset visible from designer

Comments

• gordk St.Catherines On. Canada.

  February 2004 edited 6:36AM

  hi
  read faq.txt
  or see notes in unit1.pas of fr\demos\reports
  regards
• mbana

  February 2004 edited 6:36AM

  well, it's a way to restrict the dataset list ...
  but my application is mdi designed and if the user access to the report designer with many mdi form childs currently opened, the dataset list to exclude can be very long ...
  Actually, my application comprise a report module based on SQL builder, data grid and chart viewers and so ... but lacks a true report engine and I like to give to end users the possibility to personalize the output representation based on dataset allready built.
  So is it possible for fastreport team to implement a callback dataset list provider (OnGetDatasetList) witch return for example an array of dataset ? That what I will try to do because I don't see another way ...
  regards
• bytecook

  March 2004 edited 6:36AM

  Hi mbana,
  
  I have had nearly the same problem...
  one very quick'n dirty method is the one below:
  
  ---
  procedure ExcludeFormDatasets(aForm : TForm; aReport : TfrReport);
  
  var i : integer;
  s : string;
  
  begin
  aReport.Dictionary.DisabledDatasets.
  for i := 0 to aForm.ComponentCount - 1 do begin
  if aForm.Components is TMySqlQuery then begin
  // ^^^
  // depends on your database
  s := aForm.name + aForm.Components.Name;
  
  ...
  ...
  
  aReport .Dictionary.DisabledDatasets.Add(s);
  end;
  end;
  end;
  
  
  ---
  look inside the frClass.pas > i did not see any routine to plonk a whole form
  
  involved routines:
  
  fr_class
  ============
  function TfrDataDictionary.DatasetEnabled(DatasetName: string): Boolean;
  procedure TfrDataDictionary.GetDatasetList(List: Tstrings);
  
  
  fr_utils
  ============
  procedure frGetComponents(Owner: TComponent; ClassRef: TClass; List: trings; Skip: TComponent);
  
  as you can see in the last procedure the report browses through all forms in the app
  and collects all datasets ..
  
  
  regards,
  
  peter
• ckdev

  July 2013 edited 6:36AM

  I have this same problem, but I cannot use an exclusion list as a solution, since the dataset names on the different forms might be the same.
  
  For example, in my MDI application, someone might have 2 different sales invoices, and a purchase order open. I don't want the data getting mixed between reports.
  
  Is it not possible to say "only use datasets from the same form the frxReport is on"?