在 C# .aspx 页面上通过重定向在命令提示符下执行命令

Executing command in command prompt with redirection on a C# .aspx page

我正在尝试在 .aspx 页面上使用 C# 代码在命令提示符下执行命令。代码没有抛出任何错误,但是,命令没有执行,因为没有生成新文件。

我没有发现命令本身有任何问题,因为如果我从调试视图复制命令并将其粘贴到命令提示符中,它会执行得很好。

知道为什么我的代码没有生成 ResultadoCheckMac_100939.txt 吗?

代码:

        string cmd = ejecutable_CheckMac + " " + archivo_temporal + " > " + archivo_resultado;
        System.Diagnostics.Debugger.Log(0, null, "cmd: " + cmd);

        System.Diagnostics.Debugger.Log(0, null, "Start cmd execution.");
        System.Diagnostics.Process process = new System.Diagnostics.Process();
        System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
        startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
        startInfo.FileName = "cmd.exe";
        startInfo.Arguments = cmd;
        startInfo.CreateNoWindow = true; 
        startInfo.UseShellExecute = false;
        process.StartInfo = startInfo;
        process.Start();
        System.Diagnostics.Debugger.Log(0, null, "Cmd execution finished.");

调试视图输出:

00000014    0.00096980  [136] cmd: C:\inetpub\wwwroot\cgi-bin\tbk_check_mac.exe C:\inetpub\wwwroot\cgi-bin\log\DatosParaCheckMac_100939.txt > C:\inetpub\wwwroot\cgi-bin\log\ResultadoCheckMac_100939.txt   
00000015    0.00103170  [136] Start cmd execution.  
00000016    0.01946740  [136] Cmd execution finished.

假设你想在cmd提示符下继续执行,你可以这样做:

var psi = new ProcessStartInfo("cmd", "/c " + cmd); // note the /c
psi.UseShellExecute = false;
psi.CreateNoWindow = true;
psi.RedirectStandardOutput = true;

Process.Start(psi);

/c 将提示指向 "execute the following string"。然而,更干净的方法可能是拦截输出并自己捕获它:

var psi = new ProcessStartInfo(ejecutable_CheckMac, archivo_temporal);
psi.UseShellExecute = false;
psi.CreateNoWindow = true;
psi.RedirectStandardOutput = true;

using (var proc = Process.Start(psi))
{
    using (StreamReader sr = proc.StandardOutput)
    {
        // This effectively becomes the intended contents
        // of `archivo_resultado`
        var summary = sr.ReadToEnd();
    }
}

例子

如果我想 ping -n 1 8.8.8.8,我可以使用以下任一方式来实现:

// Execute ping against command prompt
var psi = new ProcessStartInfo("cmd", @"/c ping -n 1 8.8.8.8 > save\to\ping.txt");
psi.UseShellExecute = false;
psi.CreateNoWindow = true;

Process.Start(psi);

或者,我可以这样做:

// Call ping directly passing parameters and redirecting output
var psi = new ProcessStartInfo("ping", "-n 1 8.8.8.8");
psi.UseShellExecute = false;
psi.CreateNoWindow = true;

psi.RedirectStandardOutput = true;
using (var proc = Process.Start(psi))
{
    using (StreamReader sr = proc.StandardOutput)
    {
        Console.WriteLine(sr.ReadToEnd());
    }
}

两者最终都给我(大致)相同的输出,只是现在我不必追查文件。

Pinging 8.8.8.8 with 32 bytes of data:
Reply from 8.8.8.8: bytes=32 time=18ms TTL=54

Ping statistics for 8.8.8.8:
    Packets: Sent = 1, Received = 1, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 18ms, Maximum = 18ms, Average = 18ms