2

I'm trying to run the command line utility PCLI.exe from C# and having no luck. I'm constructing a ProcessStartInfo object and have set process.StartInfo.RedirectStandardOutput = true, but when I try to read process.StandardOutput I get the following error:

Message=StandardOut has not been redirected or the process hasn't started yet.

I even tried just piping the output of my command to output.txt, and while the file gets created it's empty.

The process completes but doesn't really execute the intended file, so I'm trying to capture StandardOutput to see what's going on. Just for background purposes I'm trying to run a PVCS get command to get a file out of PVCS.

Here's a snippet of my code:

System.Diagnostics.Process process = new System.Diagnostics.Process();
System.Diagnostics.ProcessStartInfo startInfo = new     
System.Diagnostics.ProcessStartInfo();
process.StartInfo.RedirectStandardOutput = true;
startInfo.UseShellExecute = false;
startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
startInfo.WorkingDirectory = "c:\\gitmover";
startInfo.FileName = "C:\\Program Files (x86)\\Serena\\vm\\win32\\bin\\pcli.exe";

Console.WriteLine("Password:?");
string password = Console.ReadLine();
for (int i = 0; i < revisionsArray.Count(); i++)
    {
       string fileName = "/" + file.Key.Substring(file.Key.IndexOf("Customers")).Replace('\\','/');
       startInfo.Arguments = "get -r" + revisionsArray[i] + " -id\"beng:" + password + "\" -prM:\\Engineering\\SOUP -o -ac:/gitmover -bp'/Customers' -z " + fileName + "> output.txt";
       process.StartInfo = startInfo;
       process.Start();
       string strOutput = process.StandardOutput.ReadToEnd();

       //Wait for process to finish
       process.WaitForExit();
    }
4

2 回答 2

1

尝试将您的进程包装在 a 中using并使用 aStreamReader来读取标准输出。

var start = new ProcessStartInfo
            {
                FileName = _pathToPythonExecutable,
                Arguments = string.Format(" {0}", _pathToPythonCalibratorScript),
                UseShellExecute = false,
                RedirectStandardOutput = true,
                RedirectStandardInput = true,
                RedirectStandardError = true,
                WorkingDirectory = _currentWorkingDirectory            
            };

using (Process process = Process.Start(start))
                {                  
                    using (StreamReader reader = process.StandardOutput)
                    {
                        result = reader.ReadToEnd();
                    }                  
                }
于 2015-02-26T17:24:52.927 回答
0

我写了下面的代码，它对我来说很好。请注意，只有退出代码为 0 的命令才会出现在 StandardOutput 中，否则您需要检查 StandardError。

public class ProcessStarter
    {
        public static OutputEventArgs execAsync(string exe, string arguments)
        {
            OutputEventArgs oea = new OutputEventArgs();
            try
            {
                using (Process myProcess = new Process())
                {
                    ProcessStartInfo startInfo = new ProcessStartInfo();
                    startInfo.WindowStyle = ProcessWindowStyle.Hidden;
                    startInfo.RedirectStandardOutput = true;
                    startInfo.RedirectStandardError = true;
                    startInfo.UseShellExecute = false;
                    startInfo.CreateNoWindow = true;

                    startInfo.FileName = exe;
                    startInfo.Arguments = arguments;
                    myProcess.StartInfo = startInfo;
                    myProcess.Start();
                    oea.Data = myProcess.StandardOutput.ReadToEnd();
                    oea.ErrorMsg = myProcess.StandardError.ReadToEnd();
                    myProcess.WaitForExit();
                    oea.exitCode = myProcess.ExitCode;
                }
            }catch(Exception e)
            {
                oea.Data = e.Message;
                oea.ExceptionHappened();
            }
            return oea;
        }

    }

    public class OutputEventArgs
    {
        public int exitCode { get; set; }
        public OutputEventArgs() { Error = false; }
        public string Data { get; set; }
        public bool Error { get; set; }
        public bool ErrorMsg { get; set; }


        public void ExceptionHappened()
        {
            exitCode = int.MinValue;
            Error = true;
            Data = string.Empty;
        }

    }

如何使用它？

 string arguments = "get -pr" + tbProjectDatabase.Text.Trim() +
                                           " -id" + tbUsername.Text.Trim() + ":" + tbPassword.Text.Trim() +
                                           " -a'" + pvcsFolder + "' -o -z '" + tbCurrentProjectLocation.Text.Trim() + zipItem.FullNameZip + "'";

                    oea = ProcessStarter.execAsync("pcli", arguments);
于 2019-03-04T07:08:34.887 回答