请参考:
^ ]
通过Web服务方法获取客户端IP地址 [网络服务:请求客户端IP地址 [ ASP.NET(.asmx)网络服务中的客户端IP地址 [^ ]

Please refer:
How to obtain IP address of a client via web service[^]
Get Client IP Address in Web Service Method[^]
web service: requesting client ip address[^]
Client IP address in ASP.NET (.asmx) webservices[^]