c# - 从 C# 调用 python 脚本不起作用，不会引发错误

Question

我正在编写一个 C# 程序来执行带有一些参数的 python 脚本。即使没有错误并且 Process ExitCode 为 0(通过调试器检查)，程序也不会执行(它应该不仅打印出消息，而且还写入文件)。我哪里出错了？

    static private string ExecutePython(string sentence) {
        // full path of python interpreter  
        string python = @"C:\Python27\python.exe";

        // python app to call  
        string myPythonApp = @"C:\Users\user_name\Documents\pos_edit.py";

        // Create new process start info 
        ProcessStartInfo myProcessStartInfo = new ProcessStartInfo(python);

        // make sure we can read the output from stdout 
        myProcessStartInfo.UseShellExecute = false;
        myProcessStartInfo.RedirectStandardOutput = true;


        myProcessStartInfo.Arguments = string.Format("{0} {1}", myPythonApp, sentence);

        Process myProcess = new Process();
        // assign start information to the process 
        myProcess.StartInfo = myProcessStartInfo;

        // start process 
        myProcess.Start();

        // Read the standard output of the app we called.  
        StreamReader myStreamReader = myProcess.StandardOutput;
        string myString = myStreamReader.ReadToEnd();

        // wait exit signal from the app we called 
        myProcess.WaitForExit();

        // close the process 
        myProcess.Close();

        return myString;
}

Answer 1

您将 myProcess.WaitForExit(); 放在了错误的位置； 等待直到Python执行脚本:

...
myProcess.Start();

StreamReader myStreamReader = myProcess.StandardOutput;

// first, wait to complete
myProcess.WaitForExit();

// only then read the results (stdout)
string myString = myStreamReader.ReadToEnd();
...