string類型轉(zhuǎn)成byte[]:
byte[] byteArray = System.Text.Encoding.Default.GetBytes ( str );
string str = System.Text.Encoding.Default.GetString ( byteArray );
byte[] byteArray = System.Text.Encoding.ASCII.GetBytes ( str );
string str = System.Text.Encoding.ASCII.GetString ( byteArray );
public static string ToHexString ( byte[] bytes ) // 0xae00cf => "AE00CF "

{
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;
}
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<hexString.Length; i++)

{
c = hexString[i];
if (IsHexDigit(c))
newString += c;
else
discarded++;
}
// if odd number of characters, discard last character
if (newString.Length % 2 != 0)

{
discarded++;
newString = newString.Substring(0, newString.Length-1);
}

int byteLength = newString.Length / 2;
byte[] bytes = new byte[byteLength];
string hex;
int j = 0;
for (int i=0; i<bytes.Length; i++)

{

hex = new String(new Char[]
{newString[j], newString[j+1]});
bytes[i] = HexToByte(hex);
j = j+2;
}
return bytes;
}

反過來,byte[]轉(zhuǎn)成string:

其它編碼方式的,如System.Text.UTF8Encoding,System.Text.UnicodeEncoding class等;例如:
string類型轉(zhuǎn)成ASCII byte[]:("01" 轉(zhuǎn)成 byte[] = new byte[]{ 0x30, 0x31})

ASCII byte[] 轉(zhuǎn)成string:(byte[] = new byte[]{ 0x30, 0x31} 轉(zhuǎn)成 "01")

有時候還有這樣一些需求:
byte[] 轉(zhuǎn)成原16進制格式的string,例如0xae00cf, 轉(zhuǎn)換成 "ae00cf";new byte[]{ 0x30, 0x31}轉(zhuǎn)成"3031":





















反過來,16進制格式的string 轉(zhuǎn)成byte[],例如, "ae00cf"轉(zhuǎn)換成0xae00cf,長度縮減一半;"3031" 轉(zhuǎn)成new byte[]{ 0x30, 0x31}:










































