使用System.Diagnostics.Process在命令行上的文件中管道

Question

我正在尝试运行命令行程序并在文件中管道.该命令在命令行上运行正常,但我似乎无法使用C#中的Process对象.这是我发出的命令:

"C:\ Servers\CollabNet Subversion Server\svnadmin"加载C:\ Repositories\TestLoad <C:\ Temp\test.dump

除了上面的命令之外,此函数适用于我传递给它的所有其他命令:

public static bool ExecuteSvnCommand( string command, string arguments, out string result, out string errors )
{
    bool retval = false;
    string output = string.Empty;
    string errorLines = string.Empty;
    Process svnCommand = null;
    var psi = new ProcessStartInfo( command );

    psi.RedirectStandardOutput = true;
    psi.RedirectStandardError = true;
    psi.WindowStyle = ProcessWindowStyle.Hidden;
    psi.UseShellExecute = false;
    psi.CreateNoWindow = true;

    try
    {
        Process.Start( psi );
        psi.Arguments = arguments;
        svnCommand = Process.Start( psi );

        StreamReader myOutput = svnCommand.StandardOutput;
        StreamReader myErrors = svnCommand.StandardError;
        svnCommand.WaitForExit();

        if ( svnCommand.HasExited )
        {
            output = myOutput.ReadToEnd();
            errorLines = myErrors.ReadToEnd();
        }

        // Check for errors
        if ( errorLines.Trim().Length == 0 )
        {
            retval = true;
        }
    }
    catch ( Exception ex )
    {
        string msg = ex.Message;
        errorLines += Environment.NewLine + msg;
    }
    finally
    {
        if (svnCommand != null)
        {
            svnCommand.Close();
        }
    }

    result = output;
        errors = errorLines;

    return retval;
}

我已经尝试过这个功能的几种不同组合,但我无法让它工作.我一直收到"系统找不到指定文件"的消息.我已经在这里待了大约一个星期,我想我需要一些眼睛来看看我做错了什么.

Answer 1

马克和卢克都给了我正确的方向.我无法使用任何一个答案,因为我必须这样做才能在Linux中运行Mono.所以我最终按照建议写入了StandardInput.这是有效的代码:

public static bool ExecuteSvnCommandWithFileInput( string command, string arguments, string filePath, out string result, out string errors )
{
    bool retval = false;
    string output = string.Empty;
    string errorLines = string.Empty;
    Process svnCommand = null;
    var psi = new ProcessStartInfo( command );

    psi.RedirectStandardInput = true;
    psi.RedirectStandardOutput = true;
    psi.RedirectStandardError = true;
    psi.WindowStyle = ProcessWindowStyle.Hidden;
    psi.UseShellExecute = false;
    psi.CreateNoWindow = true;

    try
    {
        Process.Start( psi );
        psi.Arguments = arguments;
        svnCommand = Process.Start( psi );

        var file = new FileInfo(filePath);
        StreamReader reader = file.OpenText();
        string fileContents = reader.ReadToEnd();
        reader.Close();

        StreamWriter myWriter = svnCommand.StandardInput;
        StreamReader myOutput = svnCommand.StandardOutput;
        StreamReader myErrors = svnCommand.StandardError;

        myWriter.AutoFlush = true;
        myWriter.Write(fileContents);
        myWriter.Close();

        output = myOutput.ReadToEnd();
        errorLines = myErrors.ReadToEnd();

        // Check for errors
        if ( errorLines.Trim().Length == 0 )
        {
            retval = true;
        }
    }
    catch ( Exception ex )
    {
        string msg = ex.Message;
        errorLines += Environment.NewLine + msg;
    }
    finally
    {
        if (svnCommand != null)
        {
            svnCommand.Close();
        }
    }

    result = output;
    errors = errorLines;

    return retval;
}

Answer 2

我不是百分百肯定,但我的猜测是你必须test.dump使用其StandardInput属性手动将数据推送到进程.

否则你可以尝试使用cmd.exe执行命令:

var psi = new ProcessStartInfo( "cmd.exe /c \"" + command "\"" );

原因是">","<"和"|" 运算符由shell本身实现(cmd.exe).