The following items describe the recommended hardware, software, network infrastructure, skills, prior knowledge, and service packs you will need.

• Windows 2000 Server
• IIS version 5.0
• Internet Explorer 5.5 or 6.0

How to Get The Words for a Given Number

By using this sample code in an IIS Server, we can have a Web Service that will convert a given number into its equivalent in words. For example, if you need a code that converts a total amount such as $43.25 into words such as forty-three dollars and twenty-five cents, you can use this Web Service.

Here is the sample code for the same.

<%@ WebService Language="VB" Class="NumberToWords" %>
Imports System
Imports System.Collections
Imports System.ComponentModel
Imports System.Data
Imports System.Diagnostics
Imports System.Web
Imports System.Web.Services
Imports Microsoft.VisualBasic

Public Class NumberToWords
    Inherits System.Web.Services.WebService
  <WebMethod(Description:="Gets the words for a Number", _
             EnableSession:=False)> _
    Public Function getWords(myNumber AS String) As String
       getWords = SpellNumber(myNumber)
    End Function

'Main Function
Private Function SpellNumber(MyNumber As String)
    Dim Dollars, Cents, Temp
    Dim DecimalPlace, Count

    Dim Place(9) As String
    Place(2) = " Thousand "
    Place(3) = " Million "
    Place(4) = " Billion "
    Place(5) = " Trillion "

    ' String representation of amount
    MyNumber = Convert.ToString(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 = "zero Dollars"
        Case "One"
            Dollars = "One Dollar"
        Case Else
            Dollars = Dollars & " Dollars"
    End Select

    Select Case Cents
        Case ""
            Cents = " and zero 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
Private Function GetHundreds(MyNumber As String)
    Dim Result As String

    If Val(MyNumber) = 0 Then Exit Function
    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
Private Function GetTens(TensText 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
Private Function GetDigit(Digit 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
End Class

Making This a Web Service

1. Open Notepad.
2. Copy the code shown above and paste it into Notepad.
3. Save the file as NumberToWords.asmx into the c:\InetPub\wwwroot folder on your system.
4. Run the Web Service by requesting the file in the browser (http://localhost/NumberToWords.asmx).
5. Check the same by giving different numbers with decimals and invoking the service.

References