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Using ClientDataSets

 
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Tim
Guest
PostPosted: Wed Sep 07, 2005 8:41 am    Post subject: Using ClientDataSets Reply with quote


If I connect an RvDataSetConnection to a report using a Direct Data View and
then have an SQLQuery as the DataSet for the Connection, I get an 'Operation
not allowed on unidirectional dataset' error.

By adding a DataSetProvider and ClientDataset in between, I can solve this
problem, but it then takes three components connected to an
RvDataSetConnection. Is there a simpler way of getting round the error or am
I solving it the normal way?

Thanks.


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Thomas Pfister
Guest
PostPosted: Wed Sep 07, 2005 6:52 pm    Post subject: Re: Using ClientDataSets Reply with quote


Tim,


Quote:
Is there a simpler way
of course <g


what version of Rave do you use ?

you must set the property "RestoreDataset" to False!
In Rave versions earlier 5.1 (Rave5, bundled with Delphi 7 for example) you
must create the OnRestore-event and insert only a comment that's the event
will fire.

:-) thomas


"Tim" news:431ea72e$1 (AT) newsgroups (DOT) borland.com...
Quote:
If I connect an RvDataSetConnection to a report using a Direct Data View
and
then have an SQLQuery as the DataSet for the Connection, I get an
'Operation
not allowed on unidirectional dataset' error.

By adding a DataSetProvider and ClientDataset in between, I can solve this
problem, but it then takes three components connected to an
RvDataSetConnection. Is there a simpler way of getting round the error or
am
I solving it the normal way?

Thanks.





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Tim
Guest
PostPosted: Thu Sep 08, 2005 6:00 am    Post subject: Re: Using ClientDataSets Reply with quote



"Thomas Pfister" <thomas (AT) spam-mail (DOT) de> wrote

Quote:
Tim,


Is there a simpler way
of course
what version of Rave do you use ?

you must set the property "RestoreDataset" to False!
In Rave versions earlier 5.1 (Rave5, bundled with Delphi 7 for example)
you
must create the OnRestore-event and insert only a comment that's the event
will fire.

Hi Thomas,

Yes, I am using Rave5 bundled with Delphi 7. I have created an OnRestore
event as you suggest and it works - no error message now when I close the
report. I assume that later versions of Rave have a RestoreDataset property
instead?

Thanks.



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Thomas Pfister
Guest
PostPosted: Thu Sep 08, 2005 3:46 pm    Post subject: Re: Using ClientDataSets Reply with quote
I assume that later versions of Rave have a RestoreDataset property
Quote:
instead?
correct, the OnRestore-event is the workaround for Rave < 5.1


:-) thomas

Quote:
Hi Thomas,

Yes, I am using Rave5 bundled with Delphi 7. I have created an OnRestore
event as you suggest and it works - no error message now when I close the
report. I assume that later versions of Rave have a RestoreDataset
property
instead?

Thanks.





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