本文主要介绍了c# 获取ip及判断ip是否在区间的方法。具有很好的参考价值，下面跟着小编一起来看下吧
话不多说，请看代码：
/// <summary>
/// 获取客户端ip
/// </summary>
/// <returns></returns>
public static string getclientipaddress()
{
var httpcontext = httpcontext.current;
if (httpcontext.request.servervariables == null)
{
return null;
}
var clientip = httpcontext.request.servervariables["http_x_forwarded_for"]
httpcontext.request.servervariables["remote_addr"];
try
{
foreach (var hostaddress in dns.gethostaddresses(clientip))
{
if (hostaddress.addressfamily == addressfamily.internetwork)
{
return hostaddress.tostring();
}
}
foreach (var hostaddress in dns.gethostaddresses(dns.gethostname()))
{
if (hostaddress.addressfamily == addressfamily.internetwork)
{
return hostaddress.tostring();
}
}
}
catch (exception ex)
{
}
return clientip;
}
/// <summary>
/// ip是否在ip空间内
/// </summary>
/// <param name="ip"></param>
/// <param name="ipsection"></param>
/// <returns></returns>
public static boolean ipexistsinrange(string ip, string ipsection)
{
ipsection = ipsection.trim();
ip = ip.trim();
int idx = ipsection.indexof('-');
string beginip = ipsection.substring(0, idx);
string endip = ipsection.substring(idx + 1);
return getip2long(beginip) <= getip2long(ip) && getip2long(ip) <= getip2long(endip);
}
public static long getip2long(string ip)
{
ip = ip.trim();
string[] ips = ip.split('.');
long ip2long = 0l;
for (int i = 0; i < 4; ++i)
{
ip2long = ip2long << 8 | int64.parse(ips[i]);
}
return ip2long;
}
public static long getip2long2(string ip)
{
ip = ip.trim();
string[] ips = ip.split('.');
long ip1 = int64.parse(ips[0]);
long ip2 = int64.parse(ips[1]);
long ip3 = int64.parse(ips[2]);
long ip4 = int64.parse(ips[3]);
long ip2long = 1l * ip1 * 256 * 256 * 256 + ip2 * 256 * 256 + ip3 * 256 + ip4;
return ip2long;
}
以上就是c#获取ip及判断ip是否在区间的示例代码的详细内容。