C # convert an IP address to an unsigned integer and reverse Conversion

We know that the IP address is a 32bit address assigned to each host connected to the Internet.

According to the TCP/IP protocol, IP addresses are expressed in binary format. Each IP address is 32 bits in length, and the bits are converted into four bytes.
In c #, The int32 number is four bytes, but it is not enough because the symbol occupies one place, but the unsigned UInt32 does not.

Therefore, in theory, UInt32 can be used to completely store an IP address. The following two methods are mutual conversions between IP addresses and UInt32.

 

Public static string Int2IP (UInt32 ipCode ){
Byte a = (byte) (ipCode & 0xFF000000)> 0x18 );
Byte B = (byte) (ipCode & 0x00FF0000)> 0xF );
Byte c = (byte) (ipCode & 0x0000FF00)> 0x8 );
Byte d = (byte) (ipCode & 0x000000FF );
String ipStr = String. Format ("{0}. {1}. {2}. {3}", a, B, c, d );
Return ipStr;
}

Public static UInt32 IP2Int (string ipStr ){
String [] ip = ipStr. Split (.);
Uint ipCode = 0xFFFFFF00 | byte. Parse (ip [3]);
IpCode = ipCode & 0xFFFF00FF | (uint. Parse (ip [2]) <0x8 );
IpCode = ipCode & 0xFF00FFFF | (uint. Parse (ip [1]) <0xF );
IpCode = ipCode & 0x00FFFFFF | (uint. Parse (ip [0]) <0x18 );
Return I