Mono中的NamedPipeServerStream

Question

I am trying to convert C#.Net project into Mono. NamedPipeServerStream & NamedPipeClientStream class are not supporting in Mono and throwing Unhandle exception. Could you please help me anyone?

Code:

class Program
{
    static string _PipeName = "testPipe";
    static void Main(string[] args)
    {

        ListenForPipeServer();
    }

    static void ListenForPipeServer()
    {
        using (NamedPipeServerStream pipeServer = new NamedPipeServerStream(
                          _PipeName,
                          PipeDirection.InOut,
                          2,
                          PipeTransmissionMode.Message,
                          PipeOptions.None

                          ))
        {
            StreamReader sr = new StreamReader(pipeServer);
            StreamWriter sw = new StreamWriter(pipeServer);


            do
            {
                try
                {
                    pipeServer.WaitForConnection();
                    sw.WriteLine("Testing");
                    sw.Flush();
                    pipeServer.WaitForPipeDrain();
                    Console.WriteLine(sr.ReadLine());

                }
                catch (Exception)
                {

                    throw;
                }
                finally
                {

                    pipeServer.WaitForPipeDrain();
                    if (pipeServer.IsConnected) pipeServer.Disconnect();
                }

            } while (true);

        }
    }



}

Unhandled Exception:

System.IO.IOException: Error on creating named pipe: error code -1
at System.IO.Pipes.UnixNamedPipe.EnsureTargetFile (System.String name) [0x0001f] in /Users/builder/data/lanes/mono-mac-ui-refresh-2-10/2baeee2f/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.11/_build/mono-2.10.11.git/mcs/class/System.Core/System.IO.Pipes/PipeUnix.cs:131 at System.IO.Pipes.UnixNamedPipeServer..ctor (System.IO.Pipes.NamedPipeServerStream owner, System.String pipeName, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeAccessRights rights, PipeOptions options, Int32 inBufferSize, Int32 outBufferSize, HandleInheritability inheritability) [0x00012] in /Users/builder/data/lanes/mono-mac-ui-refresh-2-10/2baeee2f/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.11/_build/mono-2.10.11.git/mcs/class/System.Core/System.IO.Pipes/PipeUnix.cs:265 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeOptions options, Int3 2 inBufferSize, Int32 outBufferSize, System.IO.Pipes.PipeSecurity pipeSecurity, HandleInheritability inheritability, PipeAccessRights additionalAccessRights) [0x0004b] in /Users/builder/data/lanes/mono-mac-ui-refresh-2-10/2baeee2f/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.11/_build/mono-2.10.11.git/mcs/class/System.Core/System.IO.Pipes/NamedPipeServerStream.cs:100 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeOptions options, Int32 inBufferSize, Int32 outBufferSize, System.IO.Pipes.PipeSecurity pipeSecurity, HandleInheritability inheritability) [0x00000] in :0 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeOptions options, Int32 inBufferSize, Int32 outBufferSize, System.IO.Pipes.PipeSecurity pipeSecurity) [0x00000] in :0 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeOptions options, Int32 inBufferSize, Int32 outBufferSize) [0x00000] in :0 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeOptions options) [0x00000] in :0 at (wrapper remoting-invoke-with-check) System.IO.Pipes.NamedPipeServerStream:.ctor (string,System.IO.Pipes.PipeDirection,int,System.IO.Pipes.PipeTransmissionMode,System.IO.Pipes.PipeOptions) at ConsoleTestPipeApp1.Program.ListenForPipeServer () [0x00000] in /Users/Vadivelu/Project/Service_Test/ConsoleTestPipeApp1/ConsoleTestPipeApp1/Program.cs:21 at ConsoleTestPipeApp1.Program.Main (System.String[] args) [0x00000] in /Users/Vadivelu/Project/Service_Test/ConsoleTestPipeApp1/ConsoleTestPipeApp1/Program.cs:16 [ERROR] FATAL UNHANDLED EXCEPTI ON: System.IO.IOException: Error on creating named pipe: error code -1 at System.IO.Pipes.UnixNamedPipe.EnsureTargetFile (System.String name) [0x0001f] in /Users/builder/data/lanes/mono-mac-ui-refresh-2-10/2baeee2f/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.11/_build/mono-2.10.11.git/mcs/class/System.Core/System.IO.Pipes/PipeUnix.cs:131 at System.IO.Pipes.UnixNamedPipeServer..ctor (System.IO.Pipes.NamedPipeServerStream owner, System.String pipeName, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeAccessRights rights, PipeOptions options, Int32 inBufferSize, Int32 outBufferSize, HandleInheritability inheritability) [0x00012] in /Users/builder/data/lanes/mono-mac-ui-refresh-2-10/2baeee2f/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.11/_build/mono-2.10.11.git/mcs/class/System.Core/System.IO.Pipes/PipeUnix.cs:265 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInst ances, PipeTransmissionMode transmissionMode, PipeOptions options, Int32 inBufferSize, Int32 outBufferSize, System.IO.Pipes.PipeSecurity pipeSecurity, HandleInheritability inheritability, PipeAccessRights additionalAccessRights) [0x0004b] in /Users/builder/data/lanes/mono-mac-ui-refresh-2-10/2baeee2f/source/bockbuild/profiles/mono-2-10/build-root/mono-2.10.11/_build/mono-2.10.11.git/mcs/class/System.Core/System.IO.Pipes/NamedPipeServerStream.cs:100 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeOptions options, Int32 inBufferSize, Int32 outBufferSize, System.IO.Pipes.PipeSecurity pipeSecurity, HandleInheritability inheritability) [0x00000] in :0 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeOptions options, Int32 inBufferSize, Int32 ou tBufferSize, System.IO.Pipes.PipeSecurity pipeSecurity) [0x00000] in :0 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeOptions options, Int32 inBufferSize, Int32 outBufferSize) [0x00000] in :0 at System.IO.Pipes.NamedPipeServerStream..ctor (System.String pipeName, PipeDirection direction, Int32 maxNumberOfServerInstances, PipeTransmissionMode transmissionMode, PipeOptions options) [0x00000] in :0 at (wrapper remoting-invoke-with-check) System.IO.Pipes.NamedPipeServerStream:.ctor (string,System.IO.Pipes.PipeDirection,int,System.IO.Pipes.PipeTransmissionMode,System.IO.Pipes.PipeOptions) at ConsoleTestPipeApp1.Program.ListenForPipeServer () [0x00000] in /Users/Vadivelu/Project/Service_Test/ConsoleTestPipeApp1/ConsoleTestPipeApp1/Program.cs:21 at ConsoleTestPipeApp1.Program.Main (System.String[] args) [0x00000] in /Users/Vadivelu/Project/Service_Test/ConsoleTestPip eApp1/ConsoleTestPipeApp1/Program.cs:16

Answer 1

The only problem is that the pipe named "testPipe" that you are using does not exist when the C# code is accessing the pipe. If you first run the command mkfifo testPipe (on unix) and then run the following C# code, it should work.