vb.net referencing the System.Net namespace RSS

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  Varples

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  vb.net referencing the System.Net namespace

  Nov 26, 2003 07:26 AM|LINK

  What do I need to do to reference the System.Net and System.Net.Sockets namespaces ? I can see them in a class browser nesting under the System namespace, but

  Imports System
  Imports System.Net

  doesn't seem to be sufficient/correct...? Do I need to do something to the GAC to make them available ? Is there a way of promoting these nested namespaces to the root level of the GAC ? (I'm guessing the namespaces will be found then...) or...... something else.....?
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  bdesmet

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  Re: vb.net referencing the System.Net namespace

  Nov 26, 2003 07:33 AM|LINK

  Use Imports System.Net.Sockets as well.
  Bart De Smet [MVP]
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  Varples

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  Re: vb.net referencing the System.Net namespace

  Nov 26, 2003 07:40 AM|LINK

  In fact, to be completely clear here is the code:

  Imports System
  Imports System.IO
  Imports System.Net
  Imports System.Net.Sockets
  Imports System.Text
  
  
  
  
      Public Class Client
          Public Shared Sub Main()
              Dim tcpc as new System.Net.Sockets.TCPClient()
              Dim read(35) as byte
              Dim args as string() = Environment.GetCommandLineArgs()
  
  
              If (args.length < 2) then
                  console.writeline("Please specify a server name in the command line")
                  exit sub
              end if
  
  
              Dim server as string = args(1)
  
  
              'Verfiy that server exists
              Try
                  DNS.GetHostByName(server)
              Catch
                  console.writeline("Cannot find server: {0}", server)
                  exit sub
              End Try
  
  
              'Try to connect to the server
              Try
                  tcpc.Connect(server, 13)
              Catch exc as SocketException
                  console.writeline("Cannot connect to {0}: {1}", server, exc.Message)
                  exit sub
              End Try
  
  
              console.writeline("Successful connection to {0}", server)
  
  
              tcpc.close()
  
  
          End Sub
      End Class

  then from the command-line : vbc c:\client.vb resulting in: Microsoft (R) Visual Basic .NET Compiler version 7.10.3052.4 for Microsoft (R) .NET Framework version 1.1.4322.573 Copyright (C) Microsoft Corporation 1987-2002. All rights reserved. c:\Client.vb(6) : error BC30466: Namespace or type 'Net' for the Imports 'System .Net' cannot be found. Imports System.Net ~~~~~~~~~~ c:\Client.vb(7) : error BC30466: Namespace or type 'Sockets' for the Imports 'Sy stem.Net.Sockets' cannot be found. Imports System.Net.Sockets ~~~~~~~~~~~~~~~~~~ c:\Client.vb(13) : error BC30002: Type 'System.Net.Sockets.TCPClient' is not def ined. Dim tcpc as new System.Net.Sockets.TCPClient() ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ c:\Client.vb(26) : error BC30451: Name 'DNS' is not declared. DNS.GetHostByName(server) ~~~ c:\Client.vb(35) : error BC30002: Type 'SocketException' is not defined. Catch exc as SocketException ~~~~~~~~~~~~~~~
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  bdesmet

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  Re: vb.net referencing the System.Net namespace

  Nov 26, 2003 07:48 AM|LINK

  Oh I see, you should add a reference to the System.Net.dll assembly using the /r flag in the vbc.ee compiler syntax. vbc.exe /r:System.Net.dll source.vb Make sure the System.Net.dll assembly can be found through the PATH in your environment (should be ok if you're able to run vbc.exe)
  Bart De Smet [MVP]
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  Varples

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  Re: vb.net referencing the System.Net namespace

  Nov 26, 2003 08:13 AM|LINK

  Thanks for your help Bart. I do not have the System.Net.Dll file anywhere on my PC. But, as I say, it IS visible under the system namespace.... If I try using the r:System.Net.dll I get: Microsoft (R) Visual Basic .NET Compiler version 7.10.3052.4 for Microsoft (R) .NET Framework version 1.1.4322.573 Copyright (C) Microsoft Corporation 1987-2002. All rights reserved. vbc : Command line error BC2017 : could not find library 'System.Net.Dll' vbc : Fatal error BC2000 : compiler initialization failed unexpectedly: The system cannot find the file specified.
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  Varples

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  Re: vb.net referencing the System.Net namespace

  Nov 26, 2003 09:20 AM|LINK

  Stranger still, if some c# code with

  using System
  using System.Net
  using System.Net.Sockets

  such as the WinTalk.cs sample file from the SDK is compiled using csc c:\wintalk.cs It compiles right off, with no problem finding the System.Net and .Sockets namespaces The only difference between the two compilers' parameters is that the csharp compiler has an additional warningLevel="1" in machine.config