Denso BHT-202Q Bedienungsanleitung PDF herunterladen (Seite 139)

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101

When CD type is A(EAN (JAN) or UPC):

This function identifies the code type (EAN or UPC) based upon the data length

(number of digits) as shown below.

If the data length is other than 13, 8, or 7, this function throws an exception.

No. of Digits in Barcode Data Barcode type

13 EAN-13 (JAN-13), UPC-A

8 EAN-8 (JAN-8)

7 UPC-E

To check whether the CD type is correct, pass a piece of barcode data with a CD to the

Scanner.GetChkDigit method as shown below. If the returned value is equal to the CD,

then the CD is correct.

[VB]

If (Scanner.GetChkDigit("49400458", "A") = Asc("8")) Then

Console.WriteLine ("CD OK")

End If

[C#]

UnicodeEncoding encode = new UnicodeEncoding();

if (Scanner.GetChkDigit("49400458", 'A') == (int)encode.GetBytes("8")[0]) {

Console.WriteLine ("CD OK");

}

To append a CD to the barcode data, pass a piece of barcode data with a dummy

character appended to the Scanner.GetChkDigit method as shown below. The

returned value will be the CD. Replace the dummy character with the returned value.

[VB]

Dim origData As String = "4940045"

Dim digit As Integer = Scanner.GetChkDigit(origData+"0", "A")

Console.WriteLine("CD = {0}", origData + New String(Chr(digit), 1))

[C#]

string origData = "4940045";

int digit = Scanner.GetChkDigit(origData+"0", 'A');

byte[] digitByteArray = {(byte)digit};

ASCIIEncoding encode = new ASCIIEncoding();

Console.WriteLine("CD = {0}", origData + encode.GetString(digitByteArray, 0, 1));

Result

> CD = 49400458

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