我如何获得某些特定ID的用户 [英] How Can I Get The Users Of Some Specific Id

问题描述

我想知道如果任何ip是免费的，我怎样才能获得ips的用户它会抛出错误没有这样的主机已知

i want to know how can i get the users of the ips if any ip is free the it throws an error "No such host is known"

string ip1 = "10.236.105.108";
           string ip2 = "10.236.105.208";
           string st = Convert.ToString(ip1.Substring(ip1.LastIndexOf('.') + 1));
           string lt = Convert.ToString(ip2.Substring(ip2.LastIndexOf('.') + 1));

           for (int i = Convert.ToInt32(st); i <= Convert.ToInt32(lt); i++)
           {
               string addr = ip1.Substring(0, ip1.LastIndexOf('.')) + '.' + i;
               IPHostEntry entry = Dns.GetHostEntry(addr);
           }

推荐答案

这是正确的，请参阅http://msdn.microsoft.com/en-us/library/ms143998(v=vs.110）。 aspx [ ^ 。你只需要捕获异常，如果它是一个未知的地址，那么忽略它并继续下一个。

That is correct, see the Remarks section at http://msdn.microsoft.com/en-us/library/ms143998(v=vs.110).aspx[^]. You just need to catch the exception and if it is an unknown address then ignore it and go on to the next one.

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