when I execute
dim strTEMP_DATA as string
strTEMP_DATA = Encoding.ASCII. GetString(rBuff er).ToString
I alway get a string without the closing quote. I see this in the 'Autos'
window, I also see it when I hoover my mouse over the strTEMP_DATA above.
An example would be:
It looks like "test
I believe it should look like "test"
Without the closing quote I CANNOT concat strings.
How can I correct this? 4 1533
Martin,
It sounds like your string has an embedded null char in it (Char.MinValue) .
Although it is perfectly valid for a String to contain a null char, the
Debugger treats it as a string terminator so it stops displaying it. Without the closing quote I CANNOT concat strings.
The string is valid to .NET and you can concatenate other strings to it!
However with the null char, the debugger and System.Console and some for the
Windows Forms functions will not work as expected as they rely on Win32
calls which treat the null char as a string terminator.
How can I correct this?
What does your rBuffer look like, are you certain it only has valid ASCII
characters in it? Is the data in the buffer shorter then the length of the
buffer? In other woreds is there trailing zeros in the byte array?
Hope this helps
Jay
"Martin Fletcher" <Ma************ *@msn.com> wrote in message
news:vr******** ****@corp.super news.com... when I execute
dim strTEMP_DATA as string strTEMP_DATA = Encoding.ASCII. GetString(rBuff er).ToString
I alway get a string without the closing quote. I see this in the 'Autos' window, I also see it when I hoover my mouse over the strTEMP_DATA above.
An example would be: It looks like "test I believe it should look like "test"
Without the closing quote I CANNOT concat strings. How can I correct this?
1st off, thanks for the fast reply.
I'm sure it only contains ASCII characters.
The data IS usualy shorter than the buffer length, so yes there are tailing
zeros in the byte array.
Is there a fix to get around this problem?
Here's some of the code I am having the problem with
Private rBuffer(rBuffer Size) As Byte
Private Const rBufferSize As Integer = 1024
Private Sub LocalDataArriva lEvent(ByVal ar As IAsyncResult)
Dim strTEMP_DATA As String
Dim strBDR As System.Text.Str ingBuilder
Try
Dim read As Integer = lSocket.EndRece ive(ar)
If read > 0 Then
strTEMP_DATA = Encoding.ASCII. GetString(rBuff er)
RaiseEvent DataArrival(str TEMP_DATA)
rBuffer.Clear(r Buffer, 0, rBufferSize)
lSocket.BeginRe ceive(rBuffer, 0, rBufferSize, SocketFlags.Non e, New
AsyncCallback(A ddressOf Me.LocalDataArr ivalEvent), lSocket)
Else
RaiseEvent DisConnect() 'peer closed connection
End If
Exit Sub
Catch
RaiseEvent DisConnect()
End Try
End Sub
"Jay B. Harlow [MVP - Outlook]" <Ja************ @msn.com> wrote in message
news:O7******** *****@tk2msftng p13.phx.gbl... Martin, It sounds like your string has an embedded null char in it
(Char.MinValue) . Although it is perfectly valid for a String to contain a null char, the Debugger treats it as a string terminator so it stops displaying it.
Without the closing quote I CANNOT concat strings. The string is valid to .NET and you can concatenate other strings to it! However with the null char, the debugger and System.Console and some for
the Windows Forms functions will not work as expected as they rely on Win32 calls which treat the null char as a string terminator.
How can I correct this? What does your rBuffer look like, are you certain it only has valid ASCII characters in it? Is the data in the buffer shorter then the length of the buffer? In other woreds is there trailing zeros in the byte array?
Hope this helps Jay
"Martin Fletcher" <Ma************ *@msn.com> wrote in message news:vr******** ****@corp.super news.com... when I execute
dim strTEMP_DATA as string strTEMP_DATA = Encoding.ASCII. GetString(rBuff er).ToString
I alway get a string without the closing quote. I see this in the
'Autos' window, I also see it when I hoover my mouse over the strTEMP_DATA
above. An example would be: It looks like "test I believe it should look like "test"
Without the closing quote I CANNOT concat strings. How can I correct this?
I did a google and found this code:
Public Function StripNull(ByVal InString As String) As String
'Input: String containing null terminator (Chr(0))
'Returns: all character before the null terminator
Dim iNull As Integer
If Len(InString) > 0 Then
iNull = InStr(InString, vbNullChar)
Select Case iNull
Case 0
StripNull = InString
Case 1
StripNull = ""
Case Else
StripNull = Left$(InString, iNull - 1)
End Select
End If
End Function
In then code from my last post I changed it to look like
strTEMP_DATA = StripNull(Encod ing.ASCII.GetSt ring(rBuffer))
and everything works now.
"Martin Fletcher" <Ma************ *@msn.com> wrote in message
news:vr******** ****@corp.super news.com... 1st off, thanks for the fast reply.
I'm sure it only contains ASCII characters. The data IS usualy shorter than the buffer length, so yes there are
tailing zeros in the byte array.
Is there a fix to get around this problem?
Here's some of the code I am having the problem with
Private rBuffer(rBuffer Size) As Byte Private Const rBufferSize As Integer = 1024
Private Sub LocalDataArriva lEvent(ByVal ar As IAsyncResult) Dim strTEMP_DATA As String Dim strBDR As System.Text.Str ingBuilder Try Dim read As Integer = lSocket.EndRece ive(ar) If read > 0 Then strTEMP_DATA = Encoding.ASCII. GetString(rBuff er) RaiseEvent DataArrival(str TEMP_DATA) rBuffer.Clear(r Buffer, 0, rBufferSize) lSocket.BeginRe ceive(rBuffer, 0, rBufferSize, SocketFlags.Non e, New AsyncCallback(A ddressOf Me.LocalDataArr ivalEvent), lSocket) Else RaiseEvent DisConnect() 'peer closed connection End If Exit Sub Catch RaiseEvent DisConnect() End Try End Sub
"Jay B. Harlow [MVP - Outlook]" <Ja************ @msn.com> wrote in message news:O7******** *****@tk2msftng p13.phx.gbl... Martin, It sounds like your string has an embedded null char in it (Char.MinValue) . Although it is perfectly valid for a String to contain a null char, the Debugger treats it as a string terminator so it stops displaying it.
Without the closing quote I CANNOT concat strings. The string is valid to .NET and you can concatenate other strings to it! However with the null char, the debugger and System.Console and some for the Windows Forms functions will not work as expected as they rely on Win32 calls which treat the null char as a string terminator.
How can I correct this? What does your rBuffer look like, are you certain it only has valid
ASCII characters in it? Is the data in the buffer shorter then the length of
the buffer? In other woreds is there trailing zeros in the byte array?
Hope this helps Jay
"Martin Fletcher" <Ma************ *@msn.com> wrote in message news:vr******** ****@corp.super news.com... when I execute
dim strTEMP_DATA as string strTEMP_DATA = Encoding.ASCII. GetString(rBuff er).ToString
I alway get a string without the closing quote. I see this in the 'Autos' window, I also see it when I hoover my mouse over the strTEMP_DATA above. An example would be: It looks like "test I believe it should look like "test"
Without the closing quote I CANNOT concat strings. How can I correct this?
Martin,
I would pass the length of the data in the buffer to the GetString method.
Instead of: strTEMP_DATA = Encoding.ASCII. GetString(rBuff er)
I would use:
strTEMP_DATA = Encoding.ASCII. GetString(rBuff er, 0, read)
Note: you need to use the version that has starting index & length, hence
the zero in the above.
I would not use the StripNull sample you found on Google, I hope you will
agree based on the above StripNull is a lot of extra code that can be
avoided.
Hope this helps
Jay
"Martin Fletcher" <Ma************ *@msn.com> wrote in message
news:vr******** ****@corp.super news.com... 1st off, thanks for the fast reply.
I'm sure it only contains ASCII characters. The data IS usualy shorter than the buffer length, so yes there are
tailing zeros in the byte array.
Is there a fix to get around this problem?
Here's some of the code I am having the problem with
Private rBuffer(rBuffer Size) As Byte Private Const rBufferSize As Integer = 1024
Private Sub LocalDataArriva lEvent(ByVal ar As IAsyncResult) Dim strTEMP_DATA As String Dim strBDR As System.Text.Str ingBuilder Try Dim read As Integer = lSocket.EndRece ive(ar) If read > 0 Then strTEMP_DATA = Encoding.ASCII. GetString(rBuff er) RaiseEvent DataArrival(str TEMP_DATA) rBuffer.Clear(r Buffer, 0, rBufferSize) lSocket.BeginRe ceive(rBuffer, 0, rBufferSize, SocketFlags.Non e, New AsyncCallback(A ddressOf Me.LocalDataArr ivalEvent), lSocket) Else RaiseEvent DisConnect() 'peer closed connection End If Exit Sub Catch RaiseEvent DisConnect() End Try End Sub
"Jay B. Harlow [MVP - Outlook]" <Ja************ @msn.com> wrote in message news:O7******** *****@tk2msftng p13.phx.gbl... Martin, It sounds like your string has an embedded null char in it (Char.MinValue) . Although it is perfectly valid for a String to contain a null char, the Debugger treats it as a string terminator so it stops displaying it.
Without the closing quote I CANNOT concat strings. The string is valid to .NET and you can concatenate other strings to it! However with the null char, the debugger and System.Console and some for the Windows Forms functions will not work as expected as they rely on Win32 calls which treat the null char as a string terminator.
How can I correct this? What does your rBuffer look like, are you certain it only has valid
ASCII characters in it? Is the data in the buffer shorter then the length of
the buffer? In other woreds is there trailing zeros in the byte array?
Hope this helps Jay
"Martin Fletcher" <Ma************ *@msn.com> wrote in message news:vr******** ****@corp.super news.com... when I execute
dim strTEMP_DATA as string strTEMP_DATA = Encoding.ASCII. GetString(rBuff er).ToString
I alway get a string without the closing quote. I see this in the 'Autos' window, I also see it when I hoover my mouse over the strTEMP_DATA above. An example would be: It looks like "test I believe it should look like "test"
Without the closing quote I CANNOT concat strings. How can I correct this?
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