Need help with regex

[Michael R. Pierotti]

Dim reg As New Regex("^\d{1,3} .\d{1,3}.\d{1,3 }.\d{1,3}$")
Dim m As Match = reg.Match(txtIP Address.Text)
If m.Success Then
'No need to do anything here
Else
MessageBox.Show ("You need to enter a valid IP Address", "Error!",
MessageBoxButto ns.OK, MessageBoxIcon. Hand)
txtIPAddress.Fo cus()
Return
End If


I need to match a IP addy on this and I would think this should match only a
x.x.x.x to xxx.xxx.xxx.xxx pattern yet it passes as a match when I input
192168121113

Any ideas what I am doing wrong here ?

Thanks,

Mike

[Jay B. Harlow [MVP - Outlook]]

Michael,
"." matches any character except \n. To match a period you need to "escape"
it with a slash. "\." will match a period.

Try the following:

Const pattern As String = "^\d{1,3}\.\d{1 ,3}\.\d{1,3}\.\ d{1,3}$"
Static reg As New Regex(pattern, RegexOptions.Co mpiled)
Dim m As Match = reg.Match(txtIP Address.Text)
If m.Success Then
'No need to do anything here
Else
MessageBox.Show ("You need to enter a valid IP Address",
"Error!", MessageBoxButto ns.OK, MessageBoxIcon. Hand)
End If

Unless I need the Match object specifically, I normally use Regex.IsMatch
instead.

Something like:
Const pattern As String = "^\d{1,3}\.\d{1 ,3}\.\d{1,3}\.\ d{1,3}$"
Static reg As New Regex(pattern, RegexOptions.Co mpiled)
If reg.IsMatch(txt IPAddress.Text) Then
'No need to do anything here
Else
MessageBox.Show ("You need to enter a valid IP Address",
"Error!", MessageBoxButto ns.OK, MessageBoxIcon. Hand)
End If

Hope this helps
Jay
"Michael R. Pierotti" <mr*@hafatel.co m> wrote in message
news:uU******** ******@TK2MSFTN GP12.phx.gbl...

Dim reg As New Regex("^\d{1,3} .\d{1,3}.\d{1,3 }.\d{1,3}$")
Dim m As Match = reg.Match(txtIP Address.Text)
If m.Success Then
'No need to do anything here
Else
MessageBox.Show ("You need to enter a valid IP Address", "Error!",
MessageBoxButto ns.OK, MessageBoxIcon. Hand)
txtIPAddress.Fo cus()
Return
End If


I need to match a IP addy on this and I would think this should match only
a
x.x.x.x to xxx.xxx.xxx.xxx pattern yet it passes as a match when I input
192168121113

Any ideas what I am doing wrong here ?

Thanks,

Mike

[Michael R. Pierotti]

Thank mate how did I miss that ? LOL

"Jay B. Harlow [MVP - Outlook]" <Ja************ @msn.com> wrote in message
news:uY******** ******@TK2MSFTN GP09.phx.gbl...

Michael,
"." matches any character except \n. To match a period you need to "escape" it with a slash. "\." will match a period.

Try the following:

Const pattern As String = "^\d{1,3}\.\d{1 ,3}\.\d{1,3}\.\ d{1,3}$"
Static reg As New Regex(pattern, RegexOptions.Co mpiled)
Dim m As Match = reg.Match(txtIP Address.Text)
If m.Success Then
'No need to do anything here
Else
MessageBox.Show ("You need to enter a valid IP Address",
"Error!", MessageBoxButto ns.OK, MessageBoxIcon. Hand)
End If

Unless I need the Match object specifically, I normally use Regex.IsMatch
instead.

Something like:
Const pattern As String = "^\d{1,3}\.\d{1 ,3}\.\d{1,3}\.\ d{1,3}$"
Static reg As New Regex(pattern, RegexOptions.Co mpiled)
If reg.IsMatch(txt IPAddress.Text) Then
'No need to do anything here
Else
MessageBox.Show ("You need to enter a valid IP Address",
"Error!", MessageBoxButto ns.OK, MessageBoxIcon. Hand)
End If

Hope this helps
Jay
"Michael R. Pierotti" <mr*@hafatel.co m> wrote in message
news:uU******** ******@TK2MSFTN GP12.phx.gbl...

Dim reg As New Regex("^\d{1,3} .\d{1,3}.\d{1,3 }.\d{1,3}$")
Dim m As Match = reg.Match(txtIP Address.Text)
If m.Success Then
'No need to do anything here
Else
MessageBox.Show ("You need to enter a valid IP Address", "Error!",
MessageBoxButto ns.OK, MessageBoxIcon. Hand)
txtIPAddress.Fo cus()
Return
End If


I need to match a IP addy on this and I would think this should match only a
x.x.x.x to xxx.xxx.xxx.xxx pattern yet it passes as a match when I input
192168121113

Any ideas what I am doing wrong here ?

Thanks,

Mike