How to seperate Numbers from Symbols? regular expression???

Question

hi, I am trying to seperate numbers from a string which includes %,/,etc for eg (%2459348?:, or :2434545/%). How can i seperate it, in VB.net

Answer 1

you want only the numbers right?

then you could do it like this

    Dim theString As String = "/79465*44498%464"
    Dim ret = Regex.Replace(theString, "[^0-9]", String.Empty)

hth

edit:

or do you want to split by all non number chars? then it would go like this

Dim ret = Regex.Split(theString, "[^0-9]")

Answer 2

You could loop through each character of the string and check the .IsNumber() on it.

Answer 3

This should do:

Dim test As String = "%2459348?:"
Dim match As Match = Regex.Match(test, "\d+")

If match.Success Then
  Dim result As String = match.Value
  ' Do something with result
End If

Result = 2459348

Answer 4

Here's a function which will extract all of the numbers out of a string.

Public Function GetNumbers(ByVal str as String) As String
  Dim builder As New StringBuilder()
  For Each c in str
    If Char.IsNumber(c) Then
      builder.Append(c)
    End If
  Next
  return builder.ToString()
End Function