操作方法:在C#中执行命令行,获取STD OUT结果

这是一个快速示例:

//Create process
System.Diagnostics.Process pProcess = new System.Diagnostics.Process();

//strCommand is path and file name of command to run
pProcess.StartInfo.FileName = strCommand;

//strCommandParameters are parameters to pass to program
pProcess.StartInfo.Arguments = strCommandParameters;

pProcess.StartInfo.UseShellExecute = false;

//Set output of program to be written to process output stream
pProcess.StartInfo.RedirectStandardOutput = true;   

//Optional
pProcess.StartInfo.WorkingDirectory = strWorkingDirectory;

//Start the process
pProcess.Start();

//Get program output
string strOutput = pProcess.StandardOutput.ReadToEnd();

//Wait for process to finish
pProcess.WaitForExit();

还有一个我发现有用的参数,我用它来消除进程窗口

pProcess.StartInfo.CreateNoWindow = true;

这有助于完全隐藏黑色控制台窗口,如果这是你想要的.

// usage
const string ToolFileName = "example.exe";
string output = RunExternalExe(ToolFileName);

public string RunExternalExe(string filename, string arguments = null)
{
    var process = new Process();

    process.StartInfo.FileName = filename;
    if (!string.IsNullOrEmpty(arguments))
    {
        process.StartInfo.Arguments = arguments;
    }

    process.StartInfo.CreateNoWindow = true;
    process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
    process.StartInfo.UseShellExecute = false;

    process.StartInfo.RedirectStandardError = true;
    process.StartInfo.RedirectStandardOutput = true;
    var stdOutput = new StringBuilder();
    process.OutputDataReceived += (sender, args) => stdOutput.AppendLine(args.Data); // Use AppendLine rather than Append since args.Data is one line of output, not including the newline character.

    string stdError = null;
    try
    {
        process.Start();
        process.BeginOutputReadLine();
        stdError = process.StandardError.ReadToEnd();
        process.WaitForExit();
    }
    catch (Exception e)
    {
        throw new Exception("OS error while executing " + Format(filename, arguments)+ ": " + e.Message, e);
    }

    if (process.ExitCode == 0)
    {
        return stdOutput.ToString();
    }
    else
    {
        var message = new StringBuilder();

        if (!string.IsNullOrEmpty(stdError))
        {
            message.AppendLine(stdError);
        }

        if (stdOutput.Length != 0)
        {
            message.AppendLine("Std output:");
            message.AppendLine(stdOutput.ToString());
        }

        throw new Exception(Format(filename, arguments) + " finished with exit code = " + process.ExitCode + ": " + message);
    }
}

private string Format(string filename, string arguments)
{
    return "'" + filename + 
        ((string.IsNullOrEmpty(arguments)) ? string.Empty : " " + arguments) +
        "'";
}

 System.Diagnostics.ProcessStartInfo psi =
   new System.Diagnostics.ProcessStartInfo(@"program_to_call.exe");
 psi.RedirectStandardOutput = true;
 psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
 psi.UseShellExecute = false;
 System.Diagnostics.Process proc System.Diagnostics.Process.Start(psi);;
 System.IO.StreamReader myOutput = proc.StandardOutput;
 proc.WaitForExit(2000);
 if (proc.HasExited)
  {
  string output = myOutput.ReadToEnd();
 }

此页面上接受的答案有一个在极少数情况下很麻烦的弱点.有两个文件句柄,程序按惯例,stdout和stderr写入.如果您只是读取单个文件句柄(例如Ray的答案),并且您正在开始的程序将足够的输出写入stderr,它将填充输出stderr缓冲区并阻塞.然后你的两个进程陷入僵局.缓冲区大小可以是4K.这在短期程序中极为罕见,但如果你有一个长期运行的程序,它反复输出到stderr,它最终会发生.调试和跟踪这很棘手.

有几种很好的方法可以解决这个问题.

一种方法是执行cmd.exe而不是程序,并使用cmd.exe的/ c参数调用程序以及cmd.exe的"2>&1"参数,告诉它合并stdout和stderr.

        var p = new Process();
        p.StartInfo.FileName = "cmd.exe";
        p.StartInfo.Arguments = "/c mycmd.exe 2>&1";

另一种方法是使用一个同时读取两个句柄的编程模型.

        var p = new Process();
        p.StartInfo.FileName = "cmd.exe";
        p.StartInfo.Arguments = @"/c dir \windows";
        p.StartInfo.CreateNoWindow = true;
        p.StartInfo.RedirectStandardError = true;
        p.StartInfo.RedirectStandardOutput = true;
        p.StartInfo.RedirectStandardInput = false;
        p.OutputDataReceived += (a, b) => Console.WriteLine(b.Data);
        p.ErrorDataReceived += (a, b) => Console.WriteLine(b.Data);
        p.Start();
        p.BeginErrorReadLine();
        p.BeginOutputReadLine();
        p.WaitForExit();

您将需要使用ProcessStartInfo与RedirectStandardOutput启用-那么你可以读取输出流.您可能会发现使用">"将输出重定向到文件(通过操作系统)更容易,然后只需读取文件即可.

[编辑:像雷一样:+1]