回答区
- Jaimes
可以借助第三方API接口，参考网址：https://ipapi.co/8.8.8.8/country/ ， C# 代码如下：
using System;
using System.Net;
using System.IO;
using System.Text;
public class Program
{
public static void Main()
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://ipapi.co/8.8.8.8/country/");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
var reader = new System.IO.StreamReader(response.GetResponseStream(), ASCIIEncoding.ASCII);
Console.WriteLine(reader.ReadToEnd());
}
}
- Vlam
有一个离线的 IP地区库，可以实现完全的离线查询，下载链接：https://lite.ip2location.com/database/ip-country
- 创建表并导入
CREATE DATABASE ip2location
GO
USE ip2location
GO
CREATE TABLE [ip2location].[dbo].[ip2location_db1](
[ip_from] float NOT NULL,
[ip_to] float NOT NULL,
[country_code] nvarchar(2) NOT NULL,
[country_name] nvarchar(64) NOT NULL,
) ON [PRIMARY]
GO
CREATE INDEX [ip_from] ON [ip2location].[dbo].[ip2location_db1]([ip_from]) ON [PRIMARY]
GO
CREATE INDEX [ip_to] ON [ip2location].[dbo].[ip2location_db1]([ip_to]) ON [PRIMARY]
GO
BULK INSERT [ip2location].[dbo].[ip2location_db1]
FROM C:[path to your CSV file]IP2LOCATION-LITE-DB1.CSV
WITH
(
FORMATFILE = C:[path to your DB1.FMT file]DB1.FMT
)
GO
- 代码查询
数据库有了，接下来就可以用 C# 查询了。
public class Form1 {
private void Form1_Load(object sender, System.EventArgs e) {
string ip = "8.8.8.8";
this.IP2Location(ip);
}
private void IP2Location(string myip) {
IPAddress address = null;
if (IPAddress.TryParse(myip, address)) {
byte[] addrBytes = address.GetAddressBytes();
this.LittleEndian(addrBytes);
UInt32 ipno = 0;
ipno = BitConverter.ToUInt32(addrBytes, 0);
string sql = "SELECT TOP 1 * FROM ip2location_db1 WHERE ip_to >= " ipno.ToString() "";
object conn = new SqlConnection("Server=yourserver;Database=yourdatabase;User Id=youruserid;Password=yourpassword;");
object comm = new SqlCommand(sql, conn);
SqlDataReader reader;
comm.Connection.Open();
reader = comm.ExecuteReader(CommandBehavior.CloseConnection);
int x = 0;
object sb = new StringBuilder(250);
if (reader.HasRows) {
if (reader.Read()) {
for (x = 0; (x <= (reader.FieldCount() - 1)); x ) {
sb.Append((reader.GetName(x) (": " (reader.GetValue(x) "r
"))));
}
}
}
reader.Close();
MsgBox(sb.ToString());
}
}
private void LittleEndian(ref byte[] byteArr) {
if (BitConverter.IsLittleEndian) {
List<byte> byteList = new List<byte>(byteArr);
byteList.Reverse();
byteArr = byteList.ToArray();
}
}
}
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