string和byte[]的转换 (C#)
2008-04-09 10:40 by Mainz, 13713 visits, 网摘, 收藏, 编辑反过来,byte[]转成string:
其它编码方式的,如System.Text.UTF8Encoding,System.Text.UnicodeEncoding class等;例如:
string类型转成ASCII byte[]:("01" 转成 byte[] = new byte[]{ 0x30,
0x31})
ASCII byte[]
转成string:(byte[] = new byte[]{ 0x30, 0x31} 转成 "01")
有时候还有这样一些需求:
byte[] 转成原16进制格式的string,例如0xae00cf, 转换成 "ae00cf";new byte[]{ 0x30,
0x31}转成"3031":
{
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;
}
反过来,16进制格式的string 转成byte[],例如, "ae00cf"转换成0xae00cf,长度缩减一半;"3031" 转成new byte[]{ 0x30, 0x31}:
{
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;
}