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Regular expression to allow alpha numeric plus some other characters.

Please can I have a regular expression for C# to allow alpha numeric characters plus the following:
( ) & = . / , : ' + -

I tried this which seems to work unless the forbidden character is last.  I based myself on this site.
https://www.owasp.org/index.php/OWASP_Validation_Regex_Repository

Function ValidateRtrDescription(ByVal Description As String) As Boolean

        Dim emailRegex As New System.Text.RegularExpressions.Regex("[^[a-zA-Z0-9 ()&=./,:'+-]$")  '%[A-Za-z,~:/;#-.]%'
        Dim emailMatch As System.Text.RegularExpressions.Match = emailRegex.Match(Description)
        Return emailMatch.Success
    End Function
0
AlHal2
Asked:
AlHal2
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1 Solution
 
Rgonzo1971Commented:
HI,

pls try
       Dim emailRegex As New System.Text.RegularExpressions.Regex("[^[a-zA-Z0-9\(\)&=\./,:'\+-]$")  '%[A-Za-z,~:/;#-.]%'

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REgards
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AlHal2Author Commented:
It let this through.  ~ is not valid.

Hong Kong Stock Exchange Equities+~
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Rgonzo1971Commented:
I've based my answer with line 2

then try

       Dim emailRegex As New System.Text.RegularExpressions.Regex("[^[a-zA-Z0-9\(\)&=\./,;:'\~#-]$")  '%[A-Za-z,~:/;#-.]%'

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AlHal2Author Commented:
I'm using this expression which you gave me.  It's rejecting these which should be accepted.

Hong Kong Stock Exchange Equities+:
Hong Kong Stock Exchange Equities
HongKongStockExchangeEquities+;

Dim emailRegex As New System.Text.RegularExpressions.Regex("[^[a-zA-Z0-9\(\)&=\./,;:'\~#-]$")  '%[A-Za-z,~:/;#-.]%'

Open in new window

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Rgonzo1971Commented:
Sorry I've deleted the space and the plus
       Dim emailRegex As New System.Text.RegularExpressions.Regex("[^[a-zA-Z0-9\(\)&=\s\./,;:'#~\+-]$")  '%[A-Za-z,~:/;#-.]%'

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AlHal2Author Commented:
It's rejecting this.

Hong Kong Stock Exchange Equities
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Rgonzo1971Commented:
let's try
       Dim emailRegex As New System.Text.RegularExpressions.Regex("^[a-zA-Z0-9\(\)&=\s\./,;:'#~\+-]+$")  '%[A-Za-z,~:/;#-.]%'

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Fernando SotoRetiredCommented:
Hi AlHal2;

Try this pattern to see if it helps.
Dim emailRegex As New System.Text.RegularExpressions.Regex("^[a-zA-Z0-9 \(\)&=\./,:;'\+-]+$")

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AlHal2Author Commented:
It accepted
Hong Kong Stock Exchange Equities+~
even though ~ is forbidden.
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Rgonzo1971Commented:
then try
       Dim emailRegex As New System.Text.RegularExpressions.Regex("^[a-zA-Z0-9\(\)&=\s\./,;:'#\+-]+$")

Open in new window

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AlHal2Author Commented:
Please ignore what I said before.  This works so far.

Thanks,
Alistair
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Fernando SotoRetiredCommented:
Not a problem Alistair, glad to help.
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