string類型轉成byte[]：
byte[] byteArray = System.Text.Encoding.Default.GetBytes ( str );
反過來，byte[]轉成string：
string str = System.Text.Encoding.Default.GetString ( byteArray );
其它編碼方式的，如System.Text.UTF8Encoding，System.Text.UnicodeEncoding class等；例如：
string類型轉成ASCII byte[]：（"01" 轉成 byte[] = new byte[]{ 0x30, 0x31}）
byte[] byteArray = System.Text.Encoding.ASCII.GetBytes ( str );
ASCII byte[] 轉成string：（byte[] = new byte[]{ 0x30, 0x31} 轉成 "01"）
string str = System.Text.Encoding.ASCII.GetString ( byteArray );
有時候還有這樣一些需求：
byte[] 轉成原16進位格式的string，例如0xae00cf, 轉換成 "ae00cf"；new byte[]{ 0x30, 0x31}轉成"3031":
public static string ToHexString ( byte[] bytes ) // 0xae00cf => "AE00CF "
{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_91_501_Open_Text').style.display='none'; document.getElementById('Codehighlighter1_91_501_Closed_Image').style.display='inline'; document.getElementById('Codehighlighter1_91_501_Closed_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif" alt="" align="top">{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_91_501_Closed_Text').style.display='none'; document.getElementById('Codehighlighter1_91_501_Open_Image').style.display='inline'; document.getElementById('Codehighlighter1_91_501_Open_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif" alt="" align="top"> {
string hexString = string.Empty;
if ( bytes != null )
{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_183_461_Open_Text').style.display='none'; document.getElementById('Codehighlighter1_183_461_Closed_Image').style.display='inline'; document.getElementById('Codehighlighter1_183_461_Closed_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif" alt="" align="top">{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_183_461_Closed_Text').style.display='none'; document.getElementById('Codehighlighter1_183_461_Open_Image').style.display='inline'; document.getElementById('Codehighlighter1_183_461_Open_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif" alt="" align="top"> {
StringBuilder strB = new StringBuilder ();
for ( int i = 0; i < bytes.Length; i++ )
{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_318_401_Open_Text').style.display='none'; document.getElementById('Codehighlighter1_318_401_Closed_Image').style.display='inline'; document.getElementById('Codehighlighter1_318_401_Closed_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif" alt="" align="top">{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_318_401_Closed_Text').style.display='none'; document.getElementById('Codehighlighter1_318_401_Open_Image').style.display='inline'; document.getElementById('Codehighlighter1_318_401_Open_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif" alt="" align="top"> {
strB.Append ( bytes[i].ToString ( "X2" ) );
}
hexString = strB.ToString ();
}
return hexString;
}
反過來，16進位格式的string 轉成byte[]，例如, "ae00cf"轉換成0xae00cf，長度縮減一半；"3031" 轉成new byte[]{ 0x30, 0x31}:
public static byte[] GetBytes(string hexString, out int discarded)
{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_71_784_Open_Text').style.display='none'; document.getElementById('Codehighlighter1_71_784_Closed_Image').style.display='inline'; document.getElementById('Codehighlighter1_71_784_Closed_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif" alt="" align="top">{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_71_784_Closed_Text').style.display='none'; document.getElementById('Codehighlighter1_71_784_Open_Image').style.display='inline'; document.getElementById('Codehighlighter1_71_784_Open_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif" alt="" align="top"> {
discarded = 0;
string newString = "";
char c;
// remove all none A-F, 0-9, characters
for (int i=0; i<hexString.Length; i++)
{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_216_315_Open_Text').style.display='none'; document.getElementById('Codehighlighter1_216_315_Closed_Image').style.display='inline'; document.getElementById('Codehighlighter1_216_315_Closed_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif" alt="" align="top">{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_216_315_Closed_Text').style.display='none'; document.getElementById('Codehighlighter1_216_315_Open_Image').style.display='inline'; document.getElementById('Codehighlighter1_216_315_Open_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif" alt="" align="top"> {
c = hexString[i];
if (IsHexDigit(c))
newString += c;
else
discarded++;
}
// if odd number of characters, discard last character
if (newString.Length % 2 != 0)
{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_411_494_Open_Text').style.display='none'; document.getElementById('Codehighlighter1_411_494_Closed_Image').style.display='inline'; document.getElementById('Codehighlighter1_411_494_Closed_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif" alt="" align="top">{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_411_494_Closed_Text').style.display='none'; document.getElementById('Codehighlighter1_411_494_Open_Image').style.display='inline'; document.getElementById('Codehighlighter1_411_494_Open_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif" alt="" align="top"> {
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++)
{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_648_763_Open_Text').style.display='none'; document.getElementById('Codehighlighter1_648_763_Closed_Image').style.display='inline'; document.getElementById('Codehighlighter1_648_763_Closed_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif" alt="" align="top">{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_648_763_Closed_Text').style.display='none'; document.getElementById('Codehighlighter1_648_763_Open_Image').style.display='inline'; document.getElementById('Codehighlighter1_648_763_Open_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif" alt="" align="top"> {
{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_682_712_Open_Text').style.display='none'; document.getElementById('Codehighlighter1_682_712_Closed_Image').style.display='inline'; document.getElementById('Codehighlighter1_682_712_Closed_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif" alt="" align="top">{
function onclick()
{
function onclick()
{
this.style.display='none'; document.getElementById('Codehighlighter1_682_712_Closed_Text').style.display='none'; document.getElementById('Codehighlighter1_682_712_Open_Image').style.display='inline'; document.getElementById('Codehighlighter1_682_712_Open_Text').style.display='inline';
}
}
}" src="http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif" alt="" align="top"> hex = new String(new Char[] {newString[j], newString[j+1]});
bytes[i] = HexToByte(hex);
j = j+2;
}
return bytes;
}
