leading zeros removed but then still ensure it becomes a fixed 13-digit barcode

Uncategories leading zeros removed but then still ensure it becomes a fixed 13-digit barcode

string barcodes = string.Join(",",

result.data.Select(a =>

{

if (long.TryParse(a.BarcodeValue, out long num))

{

// Remove leading zeros by parsing, then ensure 13-digit format

return num.ToString().PadLeft(13, '0');

}

return a.BarcodeValue; // fallback if not purely numeric

})

);

Input → ["0507510108257", "0001234", "7890"]

Output →


0507510108257,000000001234,000000007890

This way you always get exactly 13 digits, even after trimming the original zeros.