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T-SQL error using Code 128 when data includes a hyphen


We are using your Transact-SQL Barcode Font Formulas and when calling the following function on MS SQL 2012 it returns a valid result:
SELECT dbo.Code128(N'PR1234567NO1',0)

However, if I insert a '-' between the 7 and N and call:
SELECT dbo.Code128(N'PR1234567-NO1',0)
I get the following error from SQL:
Conversion failed when converting the nvarchar value '7-' to data type int.

Can you please advise a solution?

Operating System: Windows Server 2012R2

Application: MS SQL 2012

02-16-15     9.6 year(s) ago    

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Roxanne

Best Answer

The error is caused when there is a check for numeric characters using ISNUMERIC for the Code 128 function. In versions of SQL Server, the hyphen "-" is recognized as a numeric character. When there are several numeric characters in a Code 128 function, the encoding mode switches to Set C, and the data is interleaved into pairs. Because the hyphen isn't a true numeric character, the function crashes.

To correct a version with this issue, append AND Value (the IsNumeric Substring) BETWEEN '0' AND '9999' to any line of code that uses ISNUMERIC.

Example:

WHILE @f <= LEN(@dataToFormat) AND ISNUMERIC(SUBSTRING(@dataToFormat, @f, 1)) = 1 AND SUBSTRING(@dataToFormat, @f, 1) BETWEEN '0' AND '9999'

Posted 9.6 year(s) ago

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Other Answers (1)
Hi Don,
The new version of the TSQL Formulas has now been released and you can download them from your account in our store.

Posted 9.6 year(s) ago

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