VB.Net Converting Number to Words

by demtron on Monday, February 02, 2009 09:30 AM

I found some example code on the Microsoft site at http://support.microsoft.com/kb/213360 that shows how to convert a decimal number to words using VBA.  This type of code is specially useful for tranforming currency amounts into words for printing on a check.  I needed to have this code converted to VB.Net, so here it is:


'Main Function
Function SpellNumber(ByVal MyNumber As String) As String
Dim Dollars As String = ""
Dim Cents As String = ""
Dim Temp As String = ""
Dim DecimalPlace, Count As Integer
Dim Place(9) As String
Place(2) = " Thousand "
Place(3) = " Million "
Place(4) = " Billion "
Place(5) = " Trillion "
' String representation of amount.
MyNumber = Trim(Str(MyNumber))
' Position of decimal place 0 if none.
DecimalPlace = InStr(MyNumber, ".")
' Convert cents and set MyNumber to dollar amount.
If DecimalPlace > 0 Then
Cents = GetTens(Left(Mid(MyNumber, DecimalPlace + 1) & _
"00", 2))
MyNumber = Trim(Left(MyNumber, DecimalPlace - 1))
End If
Count = 1
Do While MyNumber <> ""
Temp = GetHundreds(Right(MyNumber, 3))
If Temp <> "" Then Dollars = Temp & Place(Count) & Dollars
If Len(MyNumber) > 3 Then
MyNumber = Left(MyNumber, Len(MyNumber) - 3)
Else
MyNumber = ""
End If
Count = Count + 1
Loop
Select Case Dollars
Case ""
Dollars = "No Dollars"
Case "One"
Dollars = "One Dollar"
Case Else
Dollars = Dollars & " Dollars"
End Select
Select Case Cents
Case ""
Cents = " and No Cents"
Case "One"
Cents = " and One Cent"
Case Else
Cents = " and " & Cents & " Cents"
End Select
SpellNumber = Dollars & Cents
End Function
' Converts a number from 100-999 into text 
Function GetHundreds(ByVal MyNumber As String) As String
Dim Result As String
If Val(MyNumber) = 0 Then : Return "" : Exit Function : End If
MyNumber = Right("000" & MyNumber, 3)
' Convert the hundreds place.
If Mid(MyNumber, 1, 1) <> "0" Then
Result = GetDigit(Mid(MyNumber, 1, 1)) & " Hundred "
End If
' Convert the tens and ones place.
If Mid(MyNumber, 2, 1) <> "0" Then
Result = Result & GetTens(Mid(MyNumber, 2))
Else
Result = Result & GetDigit(Mid(MyNumber, 3))
End If
GetHundreds = Result
End Function
' Converts a number from 10 to 99 into text. 
Function GetTens(ByVal TensText As String) As String
Dim Result As String
Result = ""           ' Null out the temporary function value.
If Val(Left(TensText, 1)) = 1 Then   ' If value between 10-19...
Select Case Val(TensText)
Case 10 : Result = "Ten"
Case 11 : Result = "Eleven"
Case 12 : Result = "Twelve"
Case 13 : Result = "Thirteen"
Case 14 : Result = "Fourteen"
Case 15 : Result = "Fifteen"
Case 16 : Result = "Sixteen"
Case 17 : Result = "Seventeen"
Case 18 : Result = "Eighteen"
Case 19 : Result = "Nineteen"
Case Else
End Select
Else                                 ' If value between 20-99...
Select Case Val(Left(TensText, 1))
Case 2 : Result = "Twenty "
Case 3 : Result = "Thirty "
Case 4 : Result = "Forty "
Case 5 : Result = "Fifty "
Case 6 : Result = "Sixty "
Case 7 : Result = "Seventy "
Case 8 : Result = "Eighty "
Case 9 : Result = "Ninety "
Case Else
End Select
Result = Result & GetDigit _
(Right(TensText, 1))  ' Retrieve ones place.
End If
GetTens = Result
End Function
' Converts a number from 1 to 9 into text. 
Function GetDigit(ByVal Digit As String) As String
Select Case Val(Digit)
Case 1 : GetDigit = "One"
Case 2 : GetDigit = "Two"
Case 3 : GetDigit = "Three"
Case 4 : GetDigit = "Four"
Case 5 : GetDigit = "Five"
Case 6 : GetDigit = "Six"
Case 7 : GetDigit = "Seven"
Case 8 : GetDigit = "Eight"
Case 9 : GetDigit = "Nine"
Case Else : GetDigit = ""
End Select
End Function


Identifying a Nullable Type Programmatically in Visual Studio

by demtron on Tuesday, December 16, 2008 05:34 PM

I have occasionally found a need to identify whether the type of a given variable is a nullable type so that I know whether I need to also use the HasValue and Value methods to obtain its contained value.  Here's a farily simple snippet of code to accomplish this.

VB.NET:
If type.IsGenericType AndAlso type.GetGenericTypeDefinition() = GetType(Nullable(Of )) Then
End If
C#:
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>)) {}

Telerik Control Problems with Intellisense

by demtron on Tuesday, December 16, 2008 05:09 PM

When reinstalling Visual Studio and accessing Web projects that use Telerik RadControls for ASP.Net Ajax, I've found that Intellisense is generally broken for that project and only for Telerik components.  Furthermore, design-time support is also lost.  Here is a list of fixes to try in order to solve this.

  1. Check whether the correct version of the components are in the GAC.
  2. If the site is running on a network share, be sure that the UNC share has fully trust by the .Net framework.  This can be entered at Start -> Control Panel -> Administrative Tools -> Microsoft .NET Framework 2.0 Configuration -> Console Root -> .NET Framework 2.0 Configuration -> My Computer -> Runtime Security Policy -> User -> Code Groups -> All_Code, then add a child code group with file:////\\computername\sharename\* with Full Trust permissions.
  3. Right-click the assembly in the /bin folder of the project and click Update Reference.

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