creating frxDBDataSets at runtime

Dave FDave F
edited September 2017 in FastReport VCL 5
Newbie here. I'm using the demo in EmbedDesigner to build an app to allow another worker here (without much technical ability) the ability to build simple reports.

I'm trying to create a bunch of TfrxDBDataSets and associated TTables on the fly at runtime. The following code is good enough to allow the user to lay out a report with fields from selected tables, but when Preview is attempted an error is thrown:

  if FindFirst('c:\data\*.dbf', faAnyFile, sr) = 0 then
  begin
    repeat
        with TfrxDBDataset.Create(self) do
        begin
         Name:='FRTable' + ChangeFileExt(ExtractFileName(sr.Name),'');
         Dataset:=TTable.Create(self);
         Dataset.Name:='Table' + ChangeFileExt(ExtractFileName(sr.Name),'');
         TTable(Dataset).DatabaseName:='c:\data\';
         TTable(DataSet).TableName:=ChangeFileExt(ExtractFileName(sr.Name),'');
         TTable(DataSet).TableType:=ttDBase;
         UserName:=ChangeFileExt(ExtractFileName(sr.Name),'');
        end;
    until FindNext(sr) <> 0;
    FindClose(sr);
I'm sure its something simple, but as a newbie I don't see it.

Comments

  • PolomintPolomint Australia
    edited 5:42AM
    Dave F wrote: »
    but when Preview is attempted an error is thrown
    What is the nature of the "error" Dave? Short of recreating your programme, it's a bit hard to tell >
  • Dave FDave F
    edited 5:42AM
    This particular version of my code does not throw a specific error. Not sure why either. I'm running it from the IDE yet it is not trapped properly.
    Polomint wrote: »
    Polomint wrote: »
    but when Preview is attempted an error is thrown
    What is the nature of the "error" Dave? Short of recreating your programme, it's a bit hard to tell >
  • gpigpi
    edited 5:42AM
    Create small demo project and attach it here
  • Dave FDave F
    edited 5:42AM
    Attached.
    gpi wrote: »
    Create small demo project and attach it here
  • Dave FDave F
    edited 5:42AM
    Any help?
  • gpigpi
    edited 5:42AM
    remove frxDBDataset1 from form
  • Dave FDave F
    edited 5:42AM
    That cleaned it up. What's going on here?
    gpi wrote: »
    remove frxDBDataset1 from form

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