Convert string to hex-string in C

Question

I have a string like  sample   I want to get a string of it in hex format  like this      796173767265    Please give the C  syntax

User · Answer

For Unicode support   public class HexadecimalEncoding       public static string ToHexString string str                var sb   new StringBuilder             var bytes   Encoding Unicode GetBytes str           foreach  var t in bytes                        sb Append t ToString  X2                        return sb ToString       returns   48656C6C6F20776F726C64  for  Hello world             public static string FromHexString string hexString                var bytes   new byte hexString Length   2           for  var i   0  i  lt  bytes Length  i                          bytes i    Convert ToByte hexString Substring i   2  2   16                      return Encoding Unicode GetString bytes      returns   Hello world  for  48656C6C6F20776F726C64

User · Answer

First you ll need to get it into a byte    so do this   byte   ba   Encoding Default GetBytes  sample      and then you can get the string   var hexString   BitConverter ToString ba     now  that s going to return a string with dashes  -  in it so you can then simply use this   hexString   hexString Replace  -          to get rid of those if you want   NOTE  you could use a different Encoding if you needed to

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In  NET 5 0 and later you can use the Convert ToHexString   method  using System  using System Text   string value    quot Hello world quot    byte   bytes   Encoding UTF8 GetBytes value    string hexString   Convert ToHexString bytes    Console WriteLine   quot String value    quot  value   quot  quot    Console WriteLine   quot    Hex value    quot  hexString   quot  quot     Running the above example code  you would get the following output  String value   quot Hello world quot     Hex value   quot 48656C6C6F20776F726C64 quot

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var result   string Join     input Select c   gt    int c  ToString  X2        OR  var result   string Join                      input Select c  gt  String Format   0 X2    Convert ToInt32 c

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According to this snippet here  this approach should be good for long strings   private string StringToHex string hexstring        StringBuilder sb   new StringBuilder        foreach  char t in hexstring                   Note  X for upper  x for lower case letters         sb Append Convert ToInt32 t  ToString  x                return sb ToString        usage   string result   StringToHex  Hello world      returns  48656c6c6f20776f726c64      Another approach in one line  string input    Hello world   string result   String Concat input Select x   gt    int x  ToString  x

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few Unicode alternatives  var s    0    var s1   string Concat s Select c   gt      int c x4          left padded with 0 -  0030d835dfcfd835dfdad835dfe5d835dff0d835dffb   var sL   BitConverter ToString Encoding Unicode GetBytes s   Replace  -                 Little Endian  300035D8CFDF35D8DADF35D8E5DF35D8F0DF35D8FBDF  var sB   BitConverter ToString Encoding BigEndianUnicode GetBytes s   Replace  -           Big Endian  0030D835DFCFD835DFDAD835DFE5D835DFF0D835DFFB      no encodding  300035D8CFDF35D8DADF35D8E5DF35D8F0DF35D8FBDF  byte   b   new byte s Length   sizeof char    Buffer BlockCopy s ToCharArray    0  b  0  b Length   var sb   BitConverter ToString b  Replace  -

[c#] Convert string to hex-string in C#

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