Remove special characters from a string

These are valid characters:

a-z
A-Z
0-9
-
/ 

How开发者_如何学C do I remove all other characters from my string?

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Dim cleanString As String = Regex.Replace(yourString, "[^A-Za-z0-9\-/]", "")

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Use either regex or Char class functions like IsControl(), IsDigit() etc. Get a list of these functions here: http://msdn.microsoft.com/en-us/library/system.char_members.aspx

Here's a sample regex example:

(Import this before using RegEx)

Imports System.Text.RegularExpressions

In your function, write this

Regex.Replace(strIn, "[^\w\\-]", "")

This statement will replace any character that is not a word, \ or -. For e.g. aa-b@c will become aa-bc.

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Dim txt As String
txt = Regex.Replace(txt, "[^a-zA-Z 0-9-/-]", "")

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Function RemoveCharacter(ByVal stringToCleanUp)
    Dim characterToRemove As String = ""
        characterToRemove = Chr(34) + "#$%&'()*+,-./\~"
        Dim firstThree As Char() = characterToRemove.Take(16).ToArray()
        For index = 1 To firstThree.Length - 1
            stringToCleanUp = stringToCleanUp.ToString.Replace(firstThree(index), "")
        Next
        Return stringToCleanUp
End Function

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I've used the first solution from LukeH, but then realized that this code replaces the dot for extension, therefore I've just upgraded the code slightly:

 Dim fileNameNoExtension As String = Path.GetFileNameWithoutExtension(fileNameWithExtension)
 Dim cleanFileName As String = Regex.Replace(fileNameNoExtension, "[^A-Za-z0-9\-/]", "") & Path.GetExtension(fileNameWithExtension)

cleanFileName will the file name with no special characters with extension.