ASP.NET根据IP获取省市地址

1、在网站的跟路径下面添加 QQWry.dat 文件，这个文件是IP数据库文件

 

2、添加以下一个类 IPScanner

 

 

C# 代码   复制

public class IPScanner
{
//私有成员#region 私有成员 
        private string dataPath;
private string ip;
private string country;
private string local;
private long firstStartIp = 0;
private long lastStartIp = 0;
private FileStream objfs = null;
private long startIp = 0;
private long endIp = 0;
private int countryFlag = 0;
private long endIpOff = 0;
private string errMsg = null;
//构造函数#region 构造函数 
        public IPScanner()
{
this.dataPath = System.Web.HttpContext.Current.Server.MapPath("/ipdata/QQWry.dat");
        }
//公共属性#region 公共属性 
        public string DataPath
{
{ dataPath = value; }
        }
public string IP
{
{ ip = value; }
        }
public string Country
{
{ return country; }
        }
public string Local
{
{ return local; }
        }
public string ErrMsg
{
{ return errMsg; }
        }
//搜索匹配数据#region 搜索匹配数据 
        private int QQwry()
{
string pattern = @"(((\\d{1,2})|(1\\d{2})|(2[0-4]\\d)|(25[0-5]))\\.){3}((\\d{1,2})|(1\\d{2})|(2[0-4]\\d)|(25[0-5]))";
            Regex objRe = new Regex(pattern);
            Match objMa = objRe.Match(ip);
if (!objMa.Success)
{
this.errMsg = "IP格式错误";
return 4;
            }
long ip_Int = this.IpToInt(ip);
int nRet = 0;
if (ip_Int >= IpToInt("127.0.0.0