Change caseing

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kejpa

Junior Contributor
Joined
Oct 10, 2003
Messages
320
Hi,
I'd like to search for a string case insensitive and if found change it to the way it's written in the pattern. Simple enough, but how?

Consider the pattern to be "\b(Me|MySelf|I|Kejpa)\b".

TIA
/Kejpa
 
In all honesty, I don't really know much of anything about regular expressions, except what I learned while looking for this answer. My guess is that you should do a case-insensitive replace, where matches are effectively replaced with the pattern they matched. I don't think this is exactly what you want, but it is a start. The secret would be RegexOptions.IgnoreCase.

Visual Basic: 
'Import the RegularExpressions namespace
Result = Regex.Replace("I want me to be capitalized", "\bMe\b", " Me ", RegexOptions.IgnoreCase)
' Result = "I want Me to be capitalized"

Also, I found this in the help (ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.1033/cpref/html/frlrfSystemTextRegularExpressionsRegexClassReplaceTopic.htm). I think it would probably suit your needs better than any code I wrote for regular expressions.


Visual Basic: 
Imports System.Text.RegularExpressions

Class RegExSample
   Shared Function CapText(m As Match) As String
      ' Get the matched string.
      Dim x As String = m.ToString()
      ' If the first char is lower case...
      If Char.IsLower(x.Chars(0)) Then
         ' Capitalize it.
         Return Char.ToUpper(x.Chars(0)) + x.Substring(1, x.Length - 1)
      End If
      Return x
   End Function    
    
   Public Shared Sub Main()
      Dim text As String = "four score and seven years ago"
      System.Console.WriteLine("text=[" + text + "]")
      Dim result As String = Regex.Replace(text, "\w+", _
         AddressOf RegExSample.CapText)
      System.Console.WriteLine("result=[" + result + "]")
   End Sub
End Class
 
marble_eater said:
The secret would be RegexOptions.IgnoreCase.

Visual Basic: 
'Import the RegularExpressions namespace
Result = Regex.Replace("I want me to be capitalized", "\bMe\b", " Me ", RegexOptions.IgnoreCase)
' Result = "I want Me to be capitalized"
Click to expand...
Sooo simple, and soo very not flexible and scaleable.

What I like is to mimic what's happening in VB.NET IDE, if you write "elseif" you will get "ElseIf" when you have finished the word with a white space char or some other char (\W)
Should I use Regex for changing
"i want to capitalize myselft" to
"I want to capitalize MySelf"
or am I better off with find loops?

TIA
/Kejpa
 
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