有没有办法在 Windows 应用程序(如 PuTTY)中执行 Linux 命令并将结果显示在文本框中。
例如我正在尝试执行以下命令
wget http://centos-webpanel.com/cwp-latest
sh cwp-latest
使用以下代码
SshClient sshclient = new SshClient(IPtxtBox.Text, UserNameTxt.Text, PasswordTxt.Text);
sshclient.Connect();
ShellStream stream = sshclient.CreateShellStream("customCommand", 80, 24, 800, 600, 1024);
resultTxt.Text = SSHCommand.SendCommand(stream, "wget http://centos-webpanel.com/cwp-latest && sh cwp-latest");
private static void WriteStream(string cmd, StreamWriter writer, ShellStream stream)
{
writer.WriteLine(cmd);
while (stream.Length == 0)
Thread.Sleep(500);
}
private static string ReadStream(StreamReader reader)
{
StringBuilder result = new StringBuilder();
string line;
while ((line = reader.ReadLine()) != null)
result.AppendLine(line);
return result.ToString();
}
private static string SendCommand(ShellStream stream, string customCMD)
{
StringBuilder strAnswer = new StringBuilder();
var reader = new StreamReader(stream);
var writer = new StreamWriter(stream);
writer.AutoFlush = true;
WriteStream(customCMD, writer, stream);
strAnswer.AppendLine(ReadStream(reader));
string answer = strAnswer.ToString();
return answer.Trim();
}
该命令执行时间较长,结果文本框中没有出现任何结果。
首先,不要使用“shell”通道来自动执行命令,除非有充分的理由。使用“exec”通道(SSH.NET 中的
CreateCommand
或 RunCommand
)。
要将输出提供给
TextBox
,只需继续在后台线程上读取流即可:
private void button1_Click(object sender, EventArgs e)
{
new Task(() => RunCommand()).Start();
}
private void RunCommand()
{
var host = "hostname";
var username = "username";
var password = "password";
using (var client = new SshClient(host, username, password))
{
client.Connect();
// If the command2 depend on an environment modified by command1,
// execute them like this.
// If not, use separate CreateCommand calls.
var cmd = client.CreateCommand("command1; command2");
var result = cmd.BeginExecute();
var stream = cmd.OutputStream;
var encoding = Encoding.UTF8;
using (var reader =
new StreamReader(stream, encoding, true, 1024, true))
{
while (!result.IsCompleted || !reader.EndOfStream)
{
string line = reader.ReadLine();
if (line != null)
{
textBox1.Invoke(
(MethodInvoker)(() =>
textBox1.AppendText(line + Environment.NewLine)));
}
}
}
cmd.EndExecute(result);
}
}
对于稍微不同的方法,请参阅类似的 WPF 问题:
SSH.NET实时命令输出监控.
某些程序(例如 Python)在以这种方式执行时可能会缓冲输出。参见:
如何在本地控制台上使用 C# SSH.NET 执行的远程主机(Raspberry Pi)上运行的 Python 程序连续写入输出?