2-D barcode formats such as PDF-417 can encode a huge character set, which means that the barcode reader toolkit needs to encode characters outside the normal ASCII range. If the Encoding property is set to 2 then the toolkit will use Unicode encoding, whereby characters can be represented by the string &#N; where N is an integer.<\/p>\n
For example:<\/p>\n
Ñ represents the character \u00d1<\/p>\n
To decode this to a unicode\u00a0string in\u00a0VB.Net you need to process the barcode value through a regular expression replacement as follows:<\/p>\n
Step 1:<\/p>\n
Create a function to convert the integer values (stored\u00a0in a string) to a single character string holding the character represented by the unicode integer value…<\/p>\n
Private Function MatchHandler(ByVal m As System.Text.RegularExpressions.Match) As String
\nDim i As Int16
\ni = Int16.Parse(m.Groups(1).Value, Globalization.NumberStyles.Integer)
\n‘ Suppress null characters.
\nIf i = 0 Then
\nReturn “”
\nEnd If
\nReturn Chr(i).ToString()
\nEnd Function<\/p>\n
Step 2:<\/p>\n
In the function where you read the barcode values:<\/p>\n
‘ Get the barcode value
\nstrBarcode = barcode.GetBarString(1)
\n‘ Create the delegate and the regular expression
\nDim myDelegate As New System.Text.RegularExpressions.MatchEvaluator(AddressOf MatchHandler)
\nDim re As New System.Text.RegularExpressions.Regex(“&#([0-9]+);”)
\n‘ Convert the Unicode escape sequences to a regular unicode string
\nstrBarcode = re.Replace(strBarcode, myDelegate)<\/p>\n","protected":false},"excerpt":{"rendered":"
2-D barcode formats such as PDF-417 can encode a huge character set, which means that the barcode reader toolkit needs to encode characters outside the normal ASCII range. If the Encoding property is set to 2 then the toolkit will use Unicode encoding, whereby characters can be represented by the string &#N; where N is<\/p>\n