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tcraigo Posted - 04/30/2004 : 21:49:50
Hello all,

I am attempting to generate a UPCA barcode in the preview window however have been unable to do so. The barcode does not conform to the UPCA format. When I feed it a string I get some other kind of barcode and no checksum is generated from string given.

Here is the barcode code:
pvwMain.AddBarCode strBCODE, prUPCA, pvwMain.CurrentX + 2880, pvwMain.CurrentY, 1440, 720

When I feed the entire string provided, including the checksum, i get no graphic output of a barcode image.

strBCODE comes from a csv file and is expressed as 75352002507 but on product box is 075352002507. The last digit "7" shoud be generated from previous 11 digits "07535200250" as hte leading 0 is padded on front of string before being passed to the preview control.

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jamescmc Posted - 03/25/2014 : 07:46:42
As I know, UPC-A is used for marking products which are sold at retail in the USA. The barcode identifies the manufacturer and specific product so point-of- sale cash register systems can automatically look up the price. I have ever used a barcode generator which supports generating UPC-A barcode in WinForms applications.
Waty Thierry Posted - 06/25/2004 : 09:48:26
I have fixed this, adding a new parameter telling if you want or not the Checksum.
It will be in the next version soon.

Come and visit :
werner Posted - 05/07/2004 : 15:50:44
I use the Anex Barcode control (see
The control supports many barcode formats and use the .ClipBoardCopy to copy to the clipboard and .DrawPictureMemory to put it on the preview.


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