Public Module Program
Public Shared Function StringToBarcode128String(ByVal value As String) As String
' Parameters : a string
' Return : a string which give the bar code when it is dispayed with CODE128.TTF font
' : an empty string if the supplied parameter is no good
Dim charPos As Integer, minCharPos As Integer
Dim currentChar As Integer, checksum As Integer
Dim isTableB As Boolean = True, isValid As Boolean = True
Dim returnValue As String = String.Empty
If value.Length > 0 Then
' Check for valid characters
For charCount As Integer = 0 To value.Length - 1
'currentChar = char.GetNumericValue(value, charPos);
currentChar = AscW(Char.Parse(value.Substring(charCount, 1)))
If Not (currentChar >= 32 AndAlso currentChar <= 126) Then
isValid = False
Exit For
End If
Next
' Barcode is full of ascii characters, we can now process it
If isValid Then
charPos = 0
While charPos < value.Length
If isTableB Then
' See if interesting to switch to table C
' yes for 4 digits at start or end, else if 6 digits
If charPos = 0 OrElse charPos + 4 = value.Length Then
minCharPos = 4
Else
minCharPos = 6
End If
minCharPos = IsNumber(value, charPos, minCharPos)
If minCharPos < 0 Then
' Choice table C
If charPos = 0 Then
' Starting with table C
' char.ConvertFromUtf32(210);
returnValue = (ChrW(210)).ToString()
Else
' Switch to table C
returnValue = returnValue & (ChrW(204)).ToString()
End If
isTableB = False
Else
If charPos = 0 Then
' Starting with table B
' char.ConvertFromUtf32(209);
returnValue = (ChrW(209)).ToString()
End If
End If
End If
If Not isTableB Then
' We are on table C, try to process 2 digits
minCharPos = 2
minCharPos = IsNumber(value, charPos, minCharPos)
If minCharPos < 0 Then
' OK for 2 digits, process it
currentChar = Integer.Parse(value.Substring(charPos, 2))
currentChar = IIf(currentChar < 95, currentChar + 32, currentChar + 105) ''
returnValue = returnValue & (ChrW(currentChar)).ToString()
charPos += 2
Else
' We haven't 2 digits, switch to table B
returnValue = returnValue & (ChrW(205)).ToString()
isTableB = True
End If
End If
If isTableB Then
' Process 1 digit with table B
returnValue = returnValue & value.Substring(charPos, 1)
charPos += 1
End If
End While
' Calculation of the checksum
checksum = 0
For [loop] As Integer = 0 To returnValue.Length - 1
currentChar = AscW(Char.Parse(returnValue.Substring([loop], 1)))
currentChar = IIf(currentChar < 127, currentChar - 32, currentChar - 105)
If [loop] = 0 Then
checksum = currentChar
Else
checksum = (checksum + ([loop] * currentChar)) Mod 103
End If
Next
' Calculation of the checksum ASCII code
checksum = IIf(checksum < 95, checksum + 32, checksum + 105)
' Add the checksum and the STOP
returnValue = returnValue & (ChrW(checksum)).ToString() & (ChrW(211)).ToString()
End If
End If
Return returnValue
End Function
End Module Write, Run & Share VB.net code online using OneCompiler's VB.net online compiler for free. It's one of the robust, feature-rich online compilers for VB.net language, running on the latest version 16. Getting started with the OneCompiler's VB.net compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as VB.net. OneCompiler also has reference programs, where you can look for the sample code to get started with.
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Public Module Program
Public Sub Main(args() As string)
Dim name as String = Console.ReadLine() ' Reading input from STDIN
Console.WriteLine("Hello " & name) ' Writing output to STDOUT
End Sub
End Module
Visual Basic is a event driven programming language by Microsoft, first released in the year 1991.
Variable is a name given to the storage area in order to identify them in our programs.
Simple syntax of Variable declaration is as follows
Dim variableName [ As [ New ] dataType ] [ = initializer ]
variableName = value
If condition-expression Then
'code
End If
If(conditional-expression)Then
'code if the conditional-expression is true
Else
'code if the conditional-expression is false
End If
If(conditional-expression)Then
'code if the above conditional-expression is true
Else If(conditional-expression) Then
'code if the above conditional-expression is true
Else
'code if the above conditional-expression is false
End If
If(conditional-expression)Then
'code if the above conditional-expression is true
If(conditional-expression)Then
'code if the above conditional-expression is true
End If
End If
Select [ Case ] expression
[ Case expressionlist
'code ]
[ Case Else
'code ]
End Select
For counter [ As datatype ] = begin To end [ Step step ]
'code
[ Continue For ]
'code
[ Exit For ]
'code
Next [ counter ]
For Each element [ As datatype ] In group
'code
[ Continue For ]
'code
[ Exit For ]
'code
Next [ element ]
While conditional-expression
'Code
[ Continue While ]
'Code
[ Exit While ]
'Code
End While
Do { While | Until } conditional-expression
'Code
[ Continue Do ]
'Code
[ Exit Do ]
'Code
Loop
Do
'Code
[ Continue Do ]
'Code
[ Exit Do ]
'Code
Loop { While | Until } conditional-expression
Procedure is a sub-routine which contains set of statements. Usually Procedures are written when multiple calls are required to same set of statements which increases re-usuability and modularity.
Procedures are of two types.
Functions return a value when they are called.
[accessModifiers] Function functionName [(parameterList)] As returnType
'code
End Function
Sub-procedures are similar to functions but they don't return any value.
Sub ProcedureName (parameterList)
'Code
End Sub