Conversion between byte arrays and strings (character arrays)

Conversion between byte arrays and strings (character arrays)

1. Conversion by default:

(1) convert string (char []) to byte []

byte[] byteArr = System.Text.Encoding.Default.GetBytes(char[]);byte[] byteArr = System.Text.Encoding.Default.GetBytes(string);byte[] byteArr = System.Text.Encoding.Default.GetBytes(char[], startindex, count);int count = System.Text.Encoding.Default.GetBytes(char * , count, byte*, startindex);int count = System.Text.Encoding.Default.GetBytes(char[] , startindex, count, byte[], startindex);int count = System.Text.Encoding.Default.GetBytes(s , startindex, count, byte[], startindex);

(2) byte [] to string (char [])

string str = System.Text.Encoding.Default.GetString ( byteArray );string str = System.Text.Encoding.Default.GetString ( byteArray, startindex, count );

The GetString method is similar to the GetChar method. The latter converts the byte array to the corresponding character array.

2. Other encoding methods

Replace the preceding Default with the ASCII, Unicode, UTF8, UTF7, UTF32, and Other encoding methods, and then call the corresponding method to convert the Default value.

string str = "01";byte[] byteArr = System.Text.Encoding.ASCI.GetBytes(str);

The above code gets byteArr = {0x30, 0x31}, which is the ASCI encoding value of 0 and 1.

byte[] byteArr = new byte[]{0x4e, 0x01};string a = System.Text.Encoding.BigEndianUnicode.GetString(byteArr);

The code above assigns a value to variable a for decoding the second Chinese character "ding" of unicode encoding, and the unicode code of "ding" is \ u4e01.

3. Convert Byte [] to a hexadecimal string

public static string ToHexString ( byte[] bytes ) {      string hexString = string.Empty;      if ( bytes != null )      {          StringBuilder strB = new StringBuilder ();           for ( int i = 0; i < bytes.Length; i++ )          {              strB.Append ( bytes[i].ToString ( "X2" ) );          }          hexString = strB.ToString ();      }      return hexString;  }  

4. convert a hexadecimal string to a Byte array

Public static byte [] GetBytes (string hexString, out int discarded) {discarded = 0; string newString = ""; char c; // remove all none A-F, 0-9, characters for (int I = 0; I
 
  
For the obtained webpage or other files that use unicode encoding, you can use the preceding method to convert the encrypted unicode encoding string to a byte array, then use the preceding conversion method to convert to the corresponding character.