asp.net 调用外部应用程序

 public string ExeCommand(string commandText)
    ...{
        Process p = new Process();
        p.StartInfo.FileName = "cmd.exe"; //换成你要执行的
        p.StartInfo.UseShellExecute = false;
        p.StartInfo.RedirectStandardInput = true;
        p.StartInfo.RedirectStandardOutput = true;
        p.StartInfo.RedirectStandardError = true;
        p.StartInfo.CreateNoWindow = true;
        string strOutput = null;
        try
        ...{
            p.Start();
            p.StandardInput.WriteLine(commandText);
            p.StandardInput.WriteLine("exit");
            strOutput = p.StandardOutput.ReadToEnd();
            p.WaitForExit();
            p.Close();
        }
        catch (Exception e)
        ...{
            strOutput = e.Message;
        }
        return strOutput;
    }