如何确定我的计算机的 IP 地址是否属于指定的网络地址？
string myHost = System.Net.Dns.GetHostName();
string myIP =
System.Net.Dns.GetHostByName(myHost).AddressList[0].ToString();
MessageBox.Show(myIP);
TextReader read = new StreamReader(//Text file with network address);
var ip = read.ReadLine();
read.Close();
if (ip == //Need help with this part)
MessageBox.Show("You are on the network");
else
MessageBox.Show("You are not on the network");
我可以获得我的计算机地址，但我需要将其与网络地址进行比较，如果它属于该网络地址，则表明它属于该网络地址。
string myHost = System.Net.Dns.GetHostName();
string myIP =
System.Net.Dns.GetHostByName(myHost).AddressList[0].ToString();
MessageBox.Show(myIP);
TextReader read = new StreamReader(//Text file with network address);
var ip = read.ReadLine();
read.Close();
if (ip == //Need help with this part)
MessageBox.Show("You are on the network");
else
MessageBox.Show("You are not on the network");
I can get my computers address but I need to compare it to a network address and if it falls under that network address to show that it is.
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如果您的程序在 IP 无效时崩溃，您可以将其更改为检查该异常的 try catch（运行它并使其崩溃以查找异常）。这就是我在与 Lidgren 的多人游戏中验证 IP 的方法。
尽管这可能不是最好的方法，但它确实有效。
If your program crashes when your IP is invalid, you can change it over to a try catch that checks for that exception (run it and crash it to find the exception). This is how I validated the IP in my multiplayer with Lidgren.
Though this is probably not the best way, it works.
查看 ip 是否在某个范围内的一种简单方法是将 ip 以及范围的开头和结尾转换为 long（可以编写一个函数以将 IP 地址转换为 long）。然后查看ip是否在两个数字之间。
例如：
要检查的IP：172.17.1.25 -- 转换为long --> 172017001025
范围：
Start - 172.0.0.0 -- 转换为 long --> 172000000000
End - 172.255.255.255 -- 转换为 long --> 172255255255
现在只需检查 ip 是否在开始值和结束值之间。
One simple way to see if an ip is in a range is to convert the ip and the start and end of the range to longs (a function can be written for the conversion to a long from an IP address). Then see if the ip is between the two numbers.
For example:
IP to check: 172.17.1.25 -- Converted to long --> 172017001025
Range:
Start - 172.0.0.0 -- Converted to long --> 172000000000
End - 172.255.255.255 -- Converted to long --> 172255255255
Now just check if the ip is between the start and end values.
我推荐可以在 codeplex 上找到的 IPNetwork 实用程序。它非常灵活且功能强大。它将允许您做很多事情，确定给定 IP 地址的网络就是其中之一。
http://ipnetwork.codeplex.com/
代码应如下所示：
I recommend the IPNetwork utility that can be found on codeplex. It is pretty flexible and powerful. It will allow you to do a lot of things, and determining the network for a given ip address is one of them.
http://ipnetwork.codeplex.com/
The code should look like :