using pipelines and the .Next method

rbuser

Hi,

I need a report with specific calculations. The values needed for these
calculations cannot be retrieved with a normal SQL statement.

So I want to create a pipeline which provides a lot of records. Then I want
to run a 'while not EOF' loop and calculate the values I need.

I can make a While loop, I can check the .EOF, but a pipeline has no .Next
method.

I there a way to step through pipelines programmatically???

Rob

nardmoseley

The DataPipeline.Next method is not defined to RAP by default. However you
can easily extend RAP using the two techniques described below....

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Article: Extending RAP
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There are two very simple and powerful techniques to extend the capabilities
of RAP infinitely. These are summarized below and covered in more detail in
the RAP.hlp online help. Demos and tutorials are installed to
RBuilder\Demos\RAP. The tutorial text is located in RAP.hlp.


1. RAP Pass-Through Functions

These are functions that appear in the Language tab of RAP's Code Toolbox.
These functions are written in Delphi and can be called from RAP. RAP's
pass-through function architecture enable's developers to add new built-in
functions to RAP's code toolbox.

2. Extend RAP's RTTI

RAP's Run-time Type information defines what classes and properties can be
accessed via RAP. By default the published properties of any class that is
registered with Delphi's RegisterClass procedure is recognized by RAP. In
addition many of the public properties and methods of ReportBuilder classes
are exposed.







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Nard Moseley
Digital Metaphors Corporation
http://www.digital-metaphors.com