将 void(object, DataReceivedEventArgs) 传递给函数

Question

我正在编写一个函数来创建一个进程并运行它。

这是原来的功能：

public static void LaunchApplication(string runCommand, string commandArguments, string workingDir, string informMessage)
{
    try
    {
        Process applicationProcess = new Process();
        applicationProcess.StartInfo.FileName = runCommand;
        applicationProcess.StartInfo.WorkingDirectory = workingDir;
        applicationProcess.StartInfo.Arguments = commandArguments;
        applicationProcess.StartInfo.UseShellExecute = false;

        WriteHeadlineToConsole(informMessage);

        applicationProcess.Start();
        while (Process.GetProcesses().Any(runningProcess => runningProcess.Id == applicationProcess.Id)) { }

        WriteHeadlineToConsole("Finished " + informMessage);
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message);
        return;
    }
}

我想将函数的签名更改为：

public static void LaunchApplication(string runCommand, string commandArguments, string workingDir, string informMessage, Func<object, DataReceivedEventArgs> myMethodName)

然后在函数内部，重定向输出，类似于：

applicationProcess.OutputDataReceived += new DataReceivedEventHandler(myMethodName);

这个可以吗？

Answer 1

试试这个：

public static void LaunchApplication(string runCommand, string commandArguments, string workingDir, string informMessage, Action<string> redirectOutput, Action<string> redirectError)
{
    try
    {
        Process applicationProcess = new Process();
        applicationProcess.StartInfo.FileName = runCommand;
        applicationProcess.StartInfo.WorkingDirectory = workingDir;
        applicationProcess.StartInfo.Arguments = commandArguments;
        applicationProcess.StartInfo.UseShellExecute = false;
        applicationProcess.EnableRaisingEvents = true;
        applicationProcess.StartInfo.CreateNoWindow = true;

        if (redirectOutput != null)
            applicationProcess.OutputDataReceived += (s, data) => redirectOutput(data.Data);

        if (redirectError != null)
            applicationProcess.ErrorDataReceived += (sErr, errData) => redirectError(errData.Data);

        GeneralUtils.WriteHeadlineToConsole(informMessage);
        applicationProcess.Start();
        if (redirectOutput != null)
            applicationProcess.BeginOutputReadLine();
        if (redirectError != null)
            applicationProcess.BeginErrorReadLine();
        applicationProcess.WaitForExit();
        GeneralUtils.WriteHeadlineToConsole("Finished " + informMessage);
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message);
        return;
    }
}

用法：

LaunchApplication("cmd.exe", "/C ipconfig /all", "C:\\Windows", "Test", 
            s => Console.WriteLine("HELLO: " + s));

附言： 下面的代码很糟糕！ AccessDeniedException可能会被抛出，CPU要疯了！

while (Process.GetProcesses().Any(runningProcess => runningProcess.Id == applicationProcess.Id)) { }

改用applicationProcess.WaitForExit();！