Barcode component

rbuser

Using D5, RB 6.03
I am confused on setting a barcode component ( TppBarCode) at runtime.
The online help shows that the data property ( the logical property to which
to assign a run time variable says it is: "Run time and read only. Contains
data as retrieved from the database, which will be encoded". But wouldnt be
the tppDBBarcode used to get data from a database?
Have tried assigning to text and data, but cant get the barcode(TppBarCode)
to reflect information at runtime. Am i somehow ovelooking something
obvious?

Mark Grabowski
Polytop Corporation

rbuser

Mark,
probably you are making the barcode to small to print or something
try dropping an ean13 and feed an existing ean13 to it (like on a coke can)
you should see the same barcode
normally it should work with the eyes closed
maybe you'll have to provide more info in order to get to the bottom of the
problem
cu
marc

rbuser

I wish it was that simple.
The component is clearly visible ( have to meeet a spec - its at least 3/4
inch tall )
I have no probs with the DB based component ( tppDBBarcode ).
I cant seem to be able to use the tppBarcode component at runtime. It works
fine (and is visible when i set the info at Design time ).
However i need to be able to change it based on user input at runtime for
this application. During runtime, no matter what i have tried so far, i cant
make it change its information from what is set at design time ( in
preview ).
Like i said, what also confuses me formt eh help file is that the Data
property is read only on a toobarcode, saying it gets its data from a (the)
database. But the tppBarcode component is not based on a datasource! In my
mind thats why the tppDBBarcode exists.

MarkG

rbuser

Mark,
i'll give you a possible quck work-around
i'de like to see your code to be able to detect the problem
what you in the mean time could do is to use a memdataset or a clientdataset
in wich you fill in the desired value
hook a tppdatapipeline to it and use the TppDbbarcode component pointing to
this record(s)
this should help you get it working
i'll try to mess around with the tppbarcode component later today
cu
marc

rbuser

Mark
i have made a test app and it works perfectly
if you want it drop me a private mail!
cu
marc

digitalmetaphors

Actually, that is a misprint in the help documentation. TppBarcode's Data
property is published and therefore accessible to be set at runtime. Try
encapsulating the changes to the varcode in BeginUpdate/EndUpdate calls.

--
Cheers,

Alexander Kramnik
Digital Metaphors

rbuser

Hmm,
Thats pretty much what i tried, just assigning to the data field.
If it works for you and not me it must be something about win2k.
Interesting though that if i run the program and click the button, the
initial assignment is the same as what is already in the report. I get no
error at this point. Just changing the value in the edit box - then doing
the assignment causes the CPU debug window to come up, just as it did in my
program.
That alone is interesting, since if i get rid of teh defualt value in
ppBarcode component, and then click on the button to assign it, it also
crashes. Seems that the assignment really doesnt happen if the values on
both sides are the same.

The other interesting thing is that this problem only occurs within the IDE.
I ran your sample outside the IDE and it was fine. Ran my program outside
the IDE and it is fine as well.
I wonder where the incompatability lies?
MarkG

rbuser

Hmm,
i get the same error in the IDE even with the plain label component. when i
try to update the text property. This problem is apparently not limited to
the Barcode component. I havent had to do any updates to any of our in house
programs/reports, but with some new customer requirements i am revisiting
some of these older reports and am stumbling onto thses problems.
I had a winME machine that i had to upgrade to WIN2K ( for some OPC stuff I
am getting into ). After the upgrade soem programs had to be reinstalled -
but the Delphi installation so far has been fine, with the exception of the
report builder component. Any need to reinstall Report builder under win2k?
or are there some compatabilty issues that wouldnt go away anyway?
MarkG

rbuser

Mark,
i suggest you reinstall you machine from scratch
i've seen problems with w2k upgrade (had some also)
doing that all you soft will be reinstalled to
also see my private mail about the cpu window if thats what worries you
cu
marc