CODEWITHSUNDEEP
c#named-pipeswin32exception
Kapilarny YT
Kapilarny YT

Reputation: 27

Using Named Pipes in C#

i've been trying to use Named Pipes in C# for a while but can't get it to work. I'm working with the following code:

internal class SplitManager
{
    public static void initialize()
    {
        Debug.Log("Initializing LiveSplit pipe");
        SplitManager.pipeClientStream = new NamedPipeClientStream("//.//pipe//LiveSplit");
        Debug.Log("Successfully initialized LiveSplit pipe");
    }

    public static void startRun()
    {
        Debug.Log("[PIPE]: start");
        SplitManager.WriteString("start");
    }

    public static void performSplit()
    {
        Debug.Log("[PIPE]: split");
        SplitManager.WriteString("split");
    }

    private static void WriteString(string str)
    {
        SplitManager.pipeClientStream.Connect();
        new StreamString(SplitManager.pipeClientStream).WriteString(str);
        SplitManager.pipeClientStream.Close();
    }

    private static NamedPipeClientStream pipeClientStream;
}

public class StreamString
{
    public StreamString(Stream ioStream)
    {
        this.ioStream = ioStream;
        this.streamEncoding = new UnicodeEncoding();
    }

    public string ReadString()
    {
        int num = this.ioStream.ReadByte() * 256;
        num += this.ioStream.ReadByte();
        byte[] array = new byte[num];
        this.ioStream.Read(array, 0, num);
        return this.streamEncoding.GetString(array);
    }

    public int WriteString(string outString)
    {
        byte[] bytes = this.streamEncoding.GetBytes(outString);
        int num = bytes.Length;
        if (num > 65535)
        {
            num = 65535;
        }
        this.ioStream.WriteByte((byte)(num / 256));
        this.ioStream.WriteByte((byte)(num & 255));
        this.ioStream.Write(bytes, 0, num);
        this.ioStream.Flush();
        return bytes.Length + 2;
    }

    private Stream ioStream;

    private UnicodeEncoding streamEncoding;
}

When i run this code i get Win32Exception with an error message that it cannot find the specified file. I'm 100% sure the path is fine, since i checked it with powershell command [System.IO.Directory]::GetFiles("\\.\\pipe\\"). Any ideas why does this error happen?

Upvotes: 1

Views: 492

Answers (1)

Kapilarny YT
Kapilarny YT

Reputation: 27

It turns out that C# actually provides the "//.//pipe//" prefix to the string, so simply replacing SplitManager.pipeClientStream = new NamedPipeClientStream("//.//pipe//LiveSplit"); to SplitManager.pipeClientStream = new NamedPipeClientStream("LiveSplit"); worked!

Upvotes: 0

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