How to link two datapipeline as master/detail relationship?

rbuser

and How to Set the MasterFieldlinks property

at run time?

thank you .

digitalmetaphors

Are you using master field links to perform master detail linking as it is
done in DADE by using a single query for all detail records, instead of
letting Delphi fire a detail query every time the master record changes?
Here is a demo of this approach:

http://www.digital-metaphors.com/tips/MagicMasterDetail.zip

---------------------------------------------------------
Tech Tip: Define Master/Detail DataPipeline Links in Code
---------------------------------------------------------

Defining a Master/Detail relationship for a DataPipeline
requires that the detail pipeline have the
following properties defined:

1. MasterDataPipeline

2. MasterFieldLinks


At Delphi design-time you can use the object inspector
and the DataPipeline's FieldLinks editor to define
the master/detail relationship.


The following example illustrates how to define the
master/detail relationship dynamically at run-time.


var
lFieldLink: TppMasterFieldLink;


begin

{define the master/detail pipeline relationship}
plDetail.MasterDataPipeline := plMaster;

{create a new field link }
lFieldLink := TppMasterFieldLink.Create(nil);

lFieldLink.Parent := plDetail;

{assign the detail field name}
lFieldLink.DetailFieldName := 'CustNo';

{assign the master field name}
lFieldLink.MasterFieldName := 'CustNo';


end;


Note: The DataPipeline linking requires the records in the detail dataset to
be ordered by the linking fields. In the above example, the detail data must
be ordered by CustNo.


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Cheers,

Jim Bennett
Digital Metaphors