今天，Boylee问我知道不知道IP地址如何合理的存储到数据库中？我不知道，然后听他说了思路，记录下来。
1
public class CTrans
2
{
3
/// <summary>
4
/// IP地址转数据
5 /// </summary>
6 /// <param name="strIp">IP地址</param>
7
/// <returns>数据</returns>
8 public static uint IPToData(String strIp)
9 {
10 // 将127.0.0.1 形式的IP地址转换成10进制整数
11 uint[] ip = new uint[4];
12
13 // 找到IP地址字符串中.的位置
14 int position1 = strIp.IndexOf(".");
15 int position2 = strIp.IndexOf(".", position1 + 1);
16 int position3 = strIp.IndexOf(".", position2 + 1);
17
18 // 将每个.之间的字符串转换成整型
19 ip[0] = Convert.ToUInt32(strIp.Substring(0, position1));
20 ip[1] = Convert.ToUInt32(strIp.Substring(position1 + 1, position2-(position1 + 1)));
21 ip[2] = Convert.ToUInt32(strIp.Substring(position2 + 1, position3-(position2 + 1)));
22 ip[3] = Convert.ToUInt32(strIp.Substring(position3 + 1));
23
24 // ip0*256*256*256 + ip1*256*256 + ip2*256 + ip3
25 return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];
26 }
27
28 /// <summary>
29 /// 数据转IP地址
30 /// </summary>
31 /// <param name="uintIP">数据</param>
32 /// <returns>IP地址</returns>
33 public static String DataToIP(uint uintIP)
34 {
35 // 将10进制整数形式转换成127.0.0.1形式的IP地址
36 StringBuilder sb = new StringBuilder("");
37 sb.Append(Convert.ToString(uintIP >> 24));
38 sb.Append(".");
39 sb.Append(Convert.ToString((uintIP & 0x00FFFFFF) >> 16));
40 sb.Append(".");
41 sb.Append(Convert.ToString((uintIP & 0x0000FFFF) >> 8));
42 sb.Append(".");
43 sb.Append(Convert.ToString(uintIP & 0x000000FF));
44 sb.Append(".");
45 return sb.ToString();
46 }
47
}
public class CTrans2
{
3
/// <summary>
4
/// IP地址转数据5
/// </summary>6
/// <param name="strIp">IP地址</param>7
/// <returns>数据</returns>8
public static uint IPToData(String strIp)9
{10
// 将127.0.0.1 形式的IP地址转换成10进制整数11
uint[] ip = new uint[4];12
13
// 找到IP地址字符串中.的位置14
int position1 = strIp.IndexOf(".");15
int position2 = strIp.IndexOf(".", position1 + 1);16
int position3 = strIp.IndexOf(".", position2 + 1);17
18
// 将每个.之间的字符串转换成整型19
ip[0] = Convert.ToUInt32(strIp.Substring(0, position1));20
ip[1] = Convert.ToUInt32(strIp.Substring(position1 + 1, position2-(position1 + 1)));21
ip[2] = Convert.ToUInt32(strIp.Substring(position2 + 1, position3-(position2 + 1)));22
ip[3] = Convert.ToUInt32(strIp.Substring(position3 + 1));23
24
// ip0*256*256*256 + ip1*256*256 + ip2*256 + ip325
return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];26
}27
28
/// <summary>29
/// 数据转IP地址30
/// </summary>31
/// <param name="uintIP">数据</param>32
/// <returns>IP地址</returns>33
public static String DataToIP(uint uintIP)34
{35
// 将10进制整数形式转换成127.0.0.1形式的IP地址36
StringBuilder sb = new StringBuilder("");37
sb.Append(Convert.ToString(uintIP >> 24));38
sb.Append(".");39
sb.Append(Convert.ToString((uintIP & 0x00FFFFFF) >> 16));40
sb.Append(".");41
sb.Append(Convert.ToString((uintIP & 0x0000FFFF) >> 8));42
sb.Append(".");43
sb.Append(Convert.ToString(uintIP & 0x000000FF));44
sb.Append(".");45
return sb.ToString(); 46
}47
}前台用类似
string strIp = Request.UserHostAddress;