我希望能够在C#中自动化并捕获命令行进程。
在命令行中,我输入以下内容:
nslookup
这将启动一个 shell,它会给我一个 > 提示符。在提示符下,我输入:
ls -a mydomain.local
这将返回我的主DNS服务器上本地CNAME列表及其所附加的物理机器。
我想要做的是从C#自动化这个过程。如果这是一个简单的命令,我会使用Process.StartInfo.RedirectStandardOutput = true,但第二步的要求使我遇到了困难。
ProcessStartInfo si = new ProcessStartInfo("nslookup");
si.RedirectStandardInput = true;
si.RedirectStandardOutput = true;
Process nslookup = new Process(si);
nslookup.Start();
nslookup.StandardInput.WriteLine("ls -a mydomain.local");
nslookup.StandardInput.Flush();
// use nslookup.StandardOutput stream to read the result.
虽然不是你要求的内容,但我曾经写过一个应用程序,可以实现你正在做的事情。最终,我使用了一个.NET库来进行DNS查找,结果速度更快。
我相当确定我使用了CodeProject网站上的这个库。
我知道这是一个老问题,但仍然想做出贡献。 我使用“NsLookup Hostname Server”的 shell 输出来获取我们域中计算机名称的 IPv4 地址,并剥离任何其他信息,如 DNS 服务器/IPv6 地址。
这个方法相当快速,但它有效,还添加了故障转移,如果 shell 失败,您可以使用 C# 中内置的 nslookup 方法。
虽然代码有点长,但它使我能够从 shell 中读取 ipv4,而无需使用外部库或内置的 nslookup 函数,因为它允许选择 dns 服务器。
如果你对中间的 if 循环感到困惑,可能有更优雅的解决方案,但对于我的个人使用,这个方法效果很好,我们域中的大多数主机返回 2 个 ipv6 和 2 个 ipv4,因此,它最多测试 4 次。
希望这可以帮助到你。
private void button1_Click(object sender, EventArgs e)
{
IPAddress[] ips = NsLookup(computername, dnsserver);
txtResult.Text = string.Empty;
if (ips != null)
{
txtResult.Text = ips[0].ToString();
txtResult.Text += Environment.NewLine;
if (ips[1] != null)
{
txtResult.Text += ips[1].ToString();
}
else
{
}
}
else
{
txtResult.Text = "No IP found";
}
}
public IPAddress[] NsLookup(string computername, string domaincontroller)
{
IPAddress[] ips = new IPAddress[2];
try
{
// Creating streamreaders to read the output and the errors
StreamReader outputReader = null;
StreamReader errorReader = null;
string nslookup = @"C:\Windows\System32\Nslookup.exe";
try
{
// Setting process startupinfo
ProcessStartInfo processStartInfo = new ProcessStartInfo(nslookup, computername + " " + domaincontroller);
processStartInfo.ErrorDialog = false;
processStartInfo.UseShellExecute = false;
processStartInfo.RedirectStandardError = true;
processStartInfo.RedirectStandardInput = true;
processStartInfo.RedirectStandardOutput = true;
processStartInfo.WindowStyle = ProcessWindowStyle.Minimized;
// Starting Process
Process process = new Process();
process.StartInfo = processStartInfo;
bool processStarted = process.Start();
if (processStarted)
{
// Catching the output streams
outputReader = process.StandardOutput;
errorReader = process.StandardError;
string errorresult = errorReader.ReadLine();
errorReader.Close();
if (errorresult != null)
{
// Failure got thrown in NsLookup Streamreading, try build-in Method
try
{
ips = Dns.GetHostAddresses(computername);
return ips;
}
catch
{
return null;
}
}
else
{
// Clearing out all the values before the addresses.
outputReader.ReadLine();
outputReader.ReadLine();
outputReader.ReadLine();
outputReader.ReadLine();
// Reading and Verifying the first outputline (the address is found after "Addresses: ") - 2 part of the array is taken (after second space)
string outputline = outputReader.ReadLine();
string[] outputlineaftersplit = outputline.Split(' ');
string ipfortesting = outputlineaftersplit[2].Trim();
if (verifyIP(ipfortesting) != null) // First entry is ipv4
{
ips[0] = verifyIP(ipfortesting);
outputline = outputReader.ReadLine();
ipfortesting = outputline.Trim();
if (verifyIP(ipfortesting) != null) // First and second entry are ipv4
{
ips[1] = verifyIP(ipfortesting);
return ips;
}
else
{
return ips;
}
}
else
{
outputline = outputReader.ReadLine();
ipfortesting = outputline.Trim();
if (verifyIP(ipfortesting) != null)
{
ips[0] = verifyIP(ipfortesting);
outputline = outputReader.ReadLine();
ipfortesting = outputline.Trim();
if (verifyIP(ipfortesting) != null)
{
ips[0] = verifyIP(ipfortesting);
outputline = outputReader.ReadLine();
ipfortesting = outputline.Trim();
if (verifyIP(ipfortesting) != null)
{
ips[1] = verifyIP(ipfortesting);
return ips;
}
else
{
return ips;
}
}
else
{
return ips;
}
}
else
{
outputline = outputReader.ReadLine();
ipfortesting = outputline.Trim();
if (verifyIP(ipfortesting) != null)
{
ips[0] = verifyIP(ipfortesting);
outputline = outputReader.ReadToEnd();
ipfortesting = outputline.Trim();
if (verifyIP(ipfortesting) != null)
{
ips[1] = verifyIP(ipfortesting);
return ips;
}
else
{
return ips;
}
}
else
{
ips = null;
return ips;
}
}
}
}
}
else
{
// Failure got thrown in NsLookup Streamreading, try build-in Method
try
{
ips = Dns.GetHostAddresses(computername);
return ips;
}
catch
{
return null;
}
}
}
catch
{
System.Windows.Forms.MessageBox.Show("ERROR 1");
// Failure got thrown in NsLookup Streamreading, try build-in Method
try
{
ips = Dns.GetHostAddresses(computername);
return ips;
}
catch
{
return null;
}
}
finally
{
if (outputReader != null)
{
outputReader.Close();
}
}
}
catch
{
System.Windows.Forms.MessageBox.Show("ERROR 2");
// Failure got thrown in NsLookup Streamreading, try build-in Method
try
{
ips = Dns.GetHostAddresses(computername);
return ips;
}
catch
{
return null;
}
}
}
public IPAddress verifyIP(string ipfromreader)
{
IPAddress ipresult = null;
bool isIP = IPAddress.TryParse(ipfromreader, out ipresult);
if (isIP && (ipresult.AddressFamily != AddressFamily.InterNetworkV6))
{
return ipresult;
}
else
{
return null;
}
}
}
}
Process nslookup = Process.Start(si);
гҖӮж„ҸжҖқжҳҜеҗҜеҠЁдёҖдёӘиҝӣзЁӢжқҘиҝҗиЎҢnslookupе‘Ҫд»ӨгҖӮ - Greg Bray