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Emm

How do PDF417 Columns work?


I am using the PDF417 control in Visual FoxPro (Don't laugh we have a lot of code in this language) to print bar codes. I see that you can specify the number of columns in the properties. How does this work? If I specify for example 5 columns. How do I tell the control which column to use when I send data string to encode?
Data example: 45845A
By Road
12.56
1500.9
125.08

Also what is RS or GS? Do I need this in the bar code and do I use it?

Thanks in advance


05-30-14     1538 day(s) ago     Views: 3303

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Ben

Best Answer

The number of Columns determines the width of the PDF417 barcode by adding codewords which are a group of bars. This will decrease the modules in each Row and create a vertically shorter barcode.

PDF417 Image set to 2 Columns

image



PDF417 Image set to 3 Columns

image

How do PDF417 Rows Work?


ASCII TABLE
RS is the Record Separator
GS is the Group Separator
EOT is the End of Tranmission

To encode these functions in a PDF417 barcode:

(1) Set the ApplyTilde or ProcessTilde parameter/property to True/Enabled/Yes.

(2) Set the Encoding Mode of PDF417 to Binary

(3) Encode the RS using ~030.
Encode the GS using ~029.
Encode the End of Transmission using ~004.

Posted 1538 day(s) ago

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Other Answers (2)

Ben
It is possible to specify the number of Columns but it is not possible to specify which data goes into a particular column. When the barcode is scanned, it reads as continuous data.

Posted 1538 day(s) ago

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Emm
Hi Ben,

Thanks for the info.

If you set the barcode to have 3 columns how do you specify what data goes into what column? The DataToEncode property accepts a string value. Surelt there must be some delimiter that you would define?

This is my data I want to store in the barcode:
45845A
By Road
12.56
1500.9
125.08



Posted 1538 day(s) ago

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