c# - 从我自己的控制台应用程序在第 3 方 exe 上执行方法

Question

如果我在哪里有可执行文件:(可执行文件不是 C# 应用程序，它包含非托管代码，但代码类似)

// ConsoleApplication1.exe

class Program     
{
    static void Main()
    {
        while (true)
        {
            System.Console.WriteLine("Enter command");

            var input = System.Console.ReadLine();

            if (input == "a")
                SomeMethodA();
            else if (input == "b")
                SomeMethodB();
            else if (input == "exit")
                break;
            else
                System.Console.WriteLine("invalid command");
        }
    }

    private static void SomeMethodA()
    {
        System.Console.WriteLine("Executing method A");
    }

    private static void SomeMethodB()
    {
        System.Console.WriteLine("Executing method B");
    }
}

那么我如何从c#执行SomeMethodA()？

这是我到目前为止所解决的

        Process p = new Process();

        var procStartInfo = new ProcessStartInfo(@"ConsoleApplication1.exe") 
        {
            UseShellExecute = false,
            RedirectStandardOutput = true,
        };

        p.StartInfo = procStartInfo;

        p.Start();

        StreamReader standardOutput = p.StandardOutput;

        var line = string.Empty;

        while ((line = standardOutput.ReadLine()) != null)
        {
            Console.WriteLine(line);

            // here If I send a then ENTER I will execute method A! 
        }

Answer 1

如果您只是想传递“a”以便执行 SomeMethodA，您可以这样做

    Process p = new Process();

    var procStartInfo = new ProcessStartInfo(@"ConsoleApplication1.exe") 
    {
        UseShellExecute = false,
        RedirectStandardOutput = true,
        RedirectStandardInput = true, //New Line
    };

    p.StartInfo = procStartInfo;

    p.Start();

    StreamReader standardOutput = p.StandardOutput;
    StreamWriter standardInput = p.StandardInput; //New Line

    var line = string.Empty;


    //We must write "a" to the other program before we wait for a answer or we will be waiting forever.
    standardInput.WriteLine("a"); //New Line

    while ((line = standardOutput.ReadLine()) != null)
    {
        Console.WriteLine(line);

        //You can replace "a" with `Console.ReadLine()` if you want to pass on the console input instead of sending "a" every time.
        standardInput.WriteLine("a"); //New Line
    }

如果您想完全绕过输入过程，这是一个更难的问题(如果方法不是私有(private)的，那就更容易了)，我将删除我的答案。

---

附注您应该将两个流读取器包装在 using 语句中

using (StreamReader standardOutput = p.StandardOutput)
using (StreamWriter standardInput = p.StandardInput)
{
    var line = string.Empty;

    standardInput.WriteLine("a");

    while ((line = standardOutput.ReadLine()) != null)
    {
        Console.WriteLine(line);

        standardInput.WriteLine("a");
    }
}