问题
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, 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 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 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, 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 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
回答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.
来源：https://stackoverflow.com/questions/15479392/namedpipeserverstream-in-mono