clone dataset
lazarus / 16-Databases

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xinyiman · 2013-12-12 16:19

How do I clone a dataset connected to a dbgrid?

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BigChimp · 2013-12-12 17:41

Have you found this one
http://forum.lazarus.freepascal.org/index.php/topic,22838.msg135471.ht
ml#msg135471

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marcov · 2013-12-12 17:55

Isn't there a TMemdataset.CopyFromDataset to make that easier?

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BigChimp · 2013-12-12 18:19

Yes, but xinyiman didn't say what kind of dataset he's using. 
Bufdataset etc have no copyfromdataset. I also recall Lacak2 posting a
method using savetostream/readfromstream somewhere else in the forum.

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marcov · 2013-12-12 18:25

True. There is http://bugs.freepascal.org/view.php?id=18779 for that

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BigChimp · 2013-12-12 18:32

Maybe OP would like to provide a patch

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xinyiman · 2013-12-12 19:31

I need a method that clones a dataset any, I want to be able to reuse
the method.
However, my dataset is of type TBufDataSet and I want to consult it
without interacting with the original TBufDataSet.

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BigChimp · 2013-12-12 19:55

Did you read the code in the link I posted? Did you try it? What
didn't work? What error messages do you get?

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xinyiman · 2013-12-12 20:08

And I need to clone the dataset during the event BeforePost the
dataset. This sends the loop the program.

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BigChimp · 2013-12-12 20:19

Ok. Let us know how that goes.

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xinyiman · 2013-12-12 20:24

Maybe addressing the root problem solve the same, you know, tell me
how to set the TBufDataset in such a way that the column does not
allow duplicate article? So I would answer.

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BigChimp · 2013-12-12 20:33

Sorry, not interested in continuing without info. Bufdataset source
code is open; you can have a look yourself.

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xinyiman · 2013-12-12 20:35

ok thank you