networkstream return white space.

[Guoqi Zheng]

Dear sir,

I am using .NET tcpClient to connect to remote POP server. When I get the
string from server response, the string always contains many white space.

I think the ReceiveBufferSize is always too big, it seems to me that server
always response with a fix buffer size, but send the response stream in 3
times. I tried to get rid of those white space by trim or regex, but not any
lucky,

any one understand what I am taking about?

Any help will be appreciated!!! Please see my code example below.

Do While (qqNetworkStream.DataAvailable)

Dim bytes(qqTcpClient.ReceiveBufferSize) As Byte

qqNetworkStream.Read(bytes, 0, CInt(qqTcpClient.ReceiveBufferSize))

Dim tempString As String = System.Text.Encoding.UTF8.GetString(bytes)

Tmr = Now.TimeOfDay.TotalSeconds - Start

Dim boolTest As Boolean = False

boolTest = Regex.IsMatch(fReturn, "\r\n\.\r\n",
RegexOptions.Singleline)

If boolTest = True Or Tmr > m_TimeOut Then

Exit Do

End If

System.Threading.Thread.Sleep(300)

Loop

Return tempString



--
Kind regards

Guoqi Zheng
guoqi AT meetholland dot com
Http://www.meetholland.com

 

[Craig Vick [MSFT]]

Hi Guoqi Zheng,

NetworkStream.Read returns the number of bytes read, so when you get your string, you want to use only the bytes that were read, not the whole buffer.
Here's a help topic that gives an example http://msdn.microsoft.com/library/default.asp?url=/library/en-
us/cpref/html/frlrfsystemnetsocketsnetworkstreamclassreadtopic.asp

Hope this helps,
Craig VB.Net Team