Loading Template with TppDPTeeChart dynamically

rbuser

Hello,

I have a Template with a TppDPTeeChart. This Template is loaded
on Runimte from a Database. After Loading the template,
the DataPipeline is set to the also dynamically created DataPipeline.
After opening the report, there is no data aware content in the Tee Chart
componemt.
When I save the Template to Disk after loading from DB and setting
the pipeline, the Property DataSource = ppDBPipelineXY is
missing, although it is stored in the Database.

Where is my problem? Do I have to set it explicit after loading?

Tanks
Michael S?lzer

nicocizik

Hi Michael,

When are you loading this template? I believe that if you are creating the
pipeline dynamically, the template has no way of knowing how to find it and
link to it. Perhaps in the Template.OnLoadEnd event you could manually
connect the TeeChart to the dbpipeline to ensure it finds the reference.

--
Regards,

Nico Cizik
Digital Metaphors
http://www.digital-metaphors.com

rbuser

Hello Nico,

herer is a part of the code for easier explanation:

procedure TRepGen.Execute(...);
...
// Load Report-Template via Stream
StreamRTM := TStringStream.Create(AREC_TMPL);
try
AReport.Template.LoadFromStream(StreamRTM);
finally
StreamRTM.Free;
end;

// Connect Pipeline with Report and open
AReport.DataPipeline := FRBPipeline;
// SetPipeLine(Areport.Template.Root); ** Added for testing
FDataSet.Open;

// Open Report
AReport.DeviceType := 'Screen';
AReport.PrintToDevices;
...
end;

For testing I wrote a recursive procedure that sets the DBPipeline for the
TeeChart

procedure TRepGen.SetPipeLine(AComponent: TComponent);
var
tee : TChartSeries;
i : integer;
begin

if AComponent is TChartSeries then begin
tee := (AComponent as TChartSeries);
tee.DataSource := FRBPipeline;
end
else
for i := 0 to AComponent.ComponentCount - 1 do begin
SetPipeLine(AComponent.Components[i]);
end;
end;

And I call the function after loading the template

SetPipeLine(Areport.Template.Root);

But then I get an AV on PrintToDevices. Perhaps I'm thinking to complicated.
Or, is it still not possible to set the DataSource property with the
TeeChart Version
that shipps with Delphi7? By the way, I use Rb 7.0 and TeeChart 4.04.

When I save the template to file after calling the SetPipeLine the
DataSource
contains the following

object Series1: THorizBarSeries
Marks.ArrowLength = 20
Marks.Visible = False
DataSource = ppDBPipeline1.Owner
SeriesColor = clRed
ShowInLegend = False
XLabelsSource = 'LABEL1'
XValues.DateTime = False
XValues.Name = 'VALUE1'
XValues.Multiplier = 1.000000000000000000
XValues.Order = loNone
XValues.ValueSource = 'DIFF'
YValues.DateTime = False
YValues.Name = 'Y'
YValues.Multiplier = 1.000000000000000000
YValues.Order = loAscending
end

I don't understand, why the DataSource is set to ppDBPipeline1.Owner and why
it isn't
set by AReport.DataPipeline := FRBPipeline.

Thanks for your help
Michael