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regular expressions

when reading a string from a file how to clean off "new line" and "end of line" stuff so text is returned as a clean single line ?

Sep 4 '06 #1
4 1424
you could just use Trim() on the string which should remove any whitespace
off either end of the line.
but if you want to use regex...

\r is carriage return
\n is newline
a simple replace on these characters with the empty string will sort it out.
System.Text.RegularExpressions.Regex.Replace(input , @"\r\n", "");
hope this helps
tim

"Jon Paal" <Jon[ nospam ]Paal @ everywhere dot comwrote in message
news:%2****************@TK2MSFTNGP04.phx.gbl...
when reading a string from a file how to clean off "new line" and "end of
line" stuff so text is returned as a clean single line ?

Sep 6 '06 #2
thanks for the help. It looked like a promising solution but unfortunately did not solve my problem.

I'm trying to read a string from a text file so I can encrypt it.

When I create the text file manually, it reads and encrypts correctly.

If I try to create the text file dynamically, it encrypts to a slightly different outcome.

I can't understand why the difference.

<code>

Private Shared ReadOnly encryptionKeyBytes() As Byte = New Byte() {53, 53, 53, 53, 53, 53, 53, 53}
Private Shared Function GenerateEncryptedLicFile(ByVal inputText As String, ByVal outputFile As String) As Boolean

Dim outputStream As Stream = Nothing
Dim encryptedStream As Stream = Nothing
Dim result As Boolean = False

Dim des As DESCryptoServiceProvider = New DESCryptoServiceProvider()
des.Key = encryptionKeyBytes
des.IV = encryptionKeyBytes

Try
outputStream = New FileStream(outputFile, FileMode.Create, FileAccess.Write, FileShare.None)

Dim desEncryptor As ICryptoTransform = des.CreateEncryptor()
encryptedStream = New CryptoStream(outputStream, desEncryptor, CryptoStreamMode.Write)

Dim contents() As Byte = des.EncryptValue(inputText)

encryptedStream.Write(contents, 0, contents.Length)
result = True

Finally
If Not encryptedStream Is Nothing Then
encryptedStream.Close()
encryptedStream = Nothing
End If
If Not outputStream Is Nothing Then
outputStream.Close()
outputStream = Nothing
End If
End Try

Return result
End Function

</code>



"Tim_Mac" <ti********@community.nospamwrote in message news:eZ**************@TK2MSFTNGP04.phx.gbl...
you could just use Trim() on the string which should remove any whitespace off either end of the line.
but if you want to use regex...

\r is carriage return
\n is newline
a simple replace on these characters with the empty string will sort it out.
System.Text.RegularExpressions.Regex.Replace(input , @"\r\n", "");
hope this helps
tim

"Jon Paal" <Jon[ nospam ]Paal @ everywhere dot comwrote in message news:%2****************@TK2MSFTNGP04.phx.gbl...
>when reading a string from a file how to clean off "new line" and "end of line" stuff so text is returned as a clean single line
?


Sep 6 '06 #3
hi Jon,
how do you know which is the right one?
can you post your decrypt code.
it could be the \r\n carriage return encoded by notepad if that's how you
created the text file manually.
if you debug, the debugger should show you all the whitespace characters so
you can compare the contents of the file with the string variable, and see
what is the difference.

let me know how you get on. by the way, i can't see where this relates to
the first post, just trying to piece it together!
tim
"Jon Paal" <Jon[ nospam ]Paal @ everywhere dot comwrote in message
news:uX**************@TK2MSFTNGP04.phx.gbl...
thanks for the help. It looked like a promising solution but
unfortunately did not solve my problem.

I'm trying to read a string from a text file so I can encrypt it.

When I create the text file manually, it reads and encrypts correctly.

If I try to create the text file dynamically, it encrypts to a slightly
different outcome.

I can't understand why the difference.

<code>

Private Shared ReadOnly encryptionKeyBytes() As Byte = New Byte() {53,
53, 53, 53, 53, 53, 53, 53}
Private Shared Function GenerateEncryptedLicFile(ByVal inputText As
String, ByVal outputFile As String) As Boolean

Dim outputStream As Stream = Nothing
Dim encryptedStream As Stream = Nothing
Dim result As Boolean = False

Dim des As DESCryptoServiceProvider = New DESCryptoServiceProvider()
des.Key = encryptionKeyBytes
des.IV = encryptionKeyBytes

Try
outputStream = New FileStream(outputFile, FileMode.Create,
FileAccess.Write, FileShare.None)

Dim desEncryptor As ICryptoTransform = des.CreateEncryptor()
encryptedStream = New CryptoStream(outputStream, desEncryptor,
CryptoStreamMode.Write)

Dim contents() As Byte = des.EncryptValue(inputText)

encryptedStream.Write(contents, 0, contents.Length)
result = True

Finally
If Not encryptedStream Is Nothing Then
encryptedStream.Close()
encryptedStream = Nothing
End If
If Not outputStream Is Nothing Then
outputStream.Close()
outputStream = Nothing
End If
End Try

Return result
End Function

</code>



"Tim_Mac" <ti********@community.nospamwrote in message
news:eZ**************@TK2MSFTNGP04.phx.gbl...
>you could just use Trim() on the string which should remove any
whitespace off either end of the line.
but if you want to use regex...

\r is carriage return
\n is newline
a simple replace on these characters with the empty string will sort it
out.
System.Text.RegularExpressions.Regex.Replace(inpu t, @"\r\n", "");
hope this helps
tim

"Jon Paal" <Jon[ nospam ]Paal @ everywhere dot comwrote in message
news:%2****************@TK2MSFTNGP04.phx.gbl...
>>when reading a string from a file how to clean off "new line" and "end
of line" stuff so text is returned as a clean single line ?



Sep 6 '06 #4
found my problem.

when writing the text file dynamically, I was using objStreamWriter.WriteLine, instead of objStreamWriter.Write, so it was adding a
newline to the entry which I could not strip off.
thanks for responding

"Tim_Mac" <ti********@community.nospamwrote in message news:uK**************@TK2MSFTNGP03.phx.gbl...
hi Jon,
how do you know which is the right one?
can you post your decrypt code.
it could be the \r\n carriage return encoded by notepad if that's how you created the text file manually.
if you debug, the debugger should show you all the whitespace characters so you can compare the contents of the file with the
string variable, and see what is the difference.

let me know how you get on. by the way, i can't see where this relates to the first post, just trying to piece it together!
tim
"Jon Paal" <Jon[ nospam ]Paal @ everywhere dot comwrote in message news:uX**************@TK2MSFTNGP04.phx.gbl...
>thanks for the help. It looked like a promising solution but unfortunately did not solve my problem.

I'm trying to read a string from a text file so I can encrypt it.

When I create the text file manually, it reads and encrypts correctly.

If I try to create the text file dynamically, it encrypts to a slightly different outcome.

I can't understand why the difference.

<code>

Private Shared ReadOnly encryptionKeyBytes() As Byte = New Byte() {53, 53, 53, 53, 53, 53, 53, 53}
Private Shared Function GenerateEncryptedLicFile(ByVal inputText As String, ByVal outputFile As String) As Boolean

Dim outputStream As Stream = Nothing
Dim encryptedStream As Stream = Nothing
Dim result As Boolean = False

Dim des As DESCryptoServiceProvider = New DESCryptoServiceProvider()
des.Key = encryptionKeyBytes
des.IV = encryptionKeyBytes

Try
outputStream = New FileStream(outputFile, FileMode.Create, FileAccess.Write, FileShare.None)

Dim desEncryptor As ICryptoTransform = des.CreateEncryptor()
encryptedStream = New CryptoStream(outputStream, desEncryptor, CryptoStreamMode.Write)

Dim contents() As Byte = des.EncryptValue(inputText)

encryptedStream.Write(contents, 0, contents.Length)
result = True

Finally
If Not encryptedStream Is Nothing Then
encryptedStream.Close()
encryptedStream = Nothing
End If
If Not outputStream Is Nothing Then
outputStream.Close()
outputStream = Nothing
End If
End Try

Return result
End Function

</code>



"Tim_Mac" <ti********@community.nospamwrote in message news:eZ**************@TK2MSFTNGP04.phx.gbl...
>>you could just use Trim() on the string which should remove any whitespace off either end of the line.
but if you want to use regex...

\r is carriage return
\n is newline
a simple replace on these characters with the empty string will sort it out.
System.Text.RegularExpressions.Regex.Replace(inp ut, @"\r\n", "");
hope this helps
tim

"Jon Paal" <Jon[ nospam ]Paal @ everywhere dot comwrote in message news:%2****************@TK2MSFTNGP04.phx.gbl...
when reading a string from a file how to clean off "new line" and "end of line" stuff so text is returned as a clean single
line ?





Sep 7 '06 #5

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