byte[]陣列與十六進位制字串與字串的互相轉換（轉載）
1.請問c#中如何將十進位制數的字串轉化成十六進位制數的字串
//十進位制轉二進位制
Console.WriteLine("十進位制166的二進位制表示: "+Convert.ToString(166, 2));
//十進位制轉八進位制
Console.WriteLine("十進位制166的八進位制表示: "+Convert.ToString(166, 8));
//十進位制轉十六進位制
Console.WriteLine("十進位制166的十六進位制表示: "+Convert.ToString(166, 16));
//二進位制轉十進位制
Console.WriteLine("二進位制 111101 的十進位制表示: "+Convert.ToInt32("111101", 2));
//八進位制轉十進位制
Console.WriteLine("八進位制 44 的十進位制表示: "+Convert.ToInt32("44", 8));
//十六進位制轉十進位制
Console.WriteLine("十六進位制 CC的十進位制表示: "+Convert.ToInt32("CC", 16));
2.在串列埠通訊過程中，經常要用到 16進位制與字串、位元組陣列之間的轉換
//
private string StringToHexString(string s,Encoding encode)
{
byte[] b = encode.GetBytes(s);//按照指定編碼將string程式設計位元組陣列
string result = string.Empty;
for (int i = 0; i < b.Length; i++)//逐位元組變為16進位制字元，以%隔開
{
result += "%"+Convert.ToString(b[i], 16);
}
return result;
}
private string HexStringToString(string hs, Encoding encode)
{
//以%分割字串，並去掉空字元
string[] chars = hs.Split(new char[]{'%'},StringSplitOptions.RemoveEmptyEntries);
byte[] b = new byte[chars.Length];
//逐個字元變為16進位制位元組資料
for (int i = 0; i < chars.Length; i++)
{
b[i] = Convert.ToByte(chars[i], 16);
}
//按照指定編碼將位元組陣列變為字串
return encode.GetString(b);
}
/// <summary>/// 字串轉16進位制位元組陣列
/// </summary>/// <param name="hexString"></param>/// <returns></returns>
private static byte[] strToToHexByte(string hexString)
{
hexString = hexString.Replace(" ", "");
if ((hexString.Length % 2)
hexString += " ";
byte[] returnBytes = new byte[hexString.Length / 2];
for (int i = 0; i < returnBytes.Length; i++)
returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
return returnBytes;
}
/// <summary>/// 位元組陣列轉16進位制字串
/// </summary>/// <param name="bytes"></param>/// <returns></returns>
public static string byteToHexStr(byte[] bytes)
{
string returnStr = "";
if (bytes != null)
{
for (int i = 0; i < bytes.Length; i++)
{
returnStr += bytes[i].ToString("X2");
}
}return returnStr;
}
/// <summary>/// 從漢字轉換到16進位制
/// </summary>/// <param name="s"></param>/// <param name="charset">編碼,如"utf-8","gb2312"</param>/// <param name="fenge">是否每字元用逗號分隔</param>/// <returns></returns>
public static string ToHex(string s, string charset, bool fenge)
{
if ((s.Length % 2) != 0)
{
s += " ";//空格
//throw new ArgumentException("s is not valid chinese string!"); }
System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
byte[] bytes = chs.GetBytes(s);
string str = "";
for (int i = 0; i < bytes.Length; i++)
{
str += string.Format("{0:X}", bytes[i]);
if (fenge && (i != bytes.Length - 1))
{
str += string.Format("{0}", ",");
}
}return str.ToLower();
}
///<summary>/// 從16進位制轉換成漢字
///
</summary>///
<param name="hex"></param>///
<param name="charset">編碼,如"utf-8","gb2312"</param>///
<returns></returns>
public
static string UnHex(string hex,
string charset)
{
if (hex
== null)
throw
new ArgumentNullException("hex");
hex = hex.Replace(",",
"");
hex = hex.Replace("\n",
"");
hex = hex.Replace("\\",
"");
hex = hex.Replace("
", "");
if (hex.Length
% 2
!= 0)
{
hex +=
"20";//空格 }// 需要將 hex 轉換成 byte 陣列。
byte[] bytes
= new
byte[hex.Length
/ 2];
for (int i
= 0; i
< bytes.Length; i++)
{
try{
// 每兩個字元是一個 byte。
bytes[i] =
byte.Parse(hex.Substring(i
* 2,
2),
System.Globalization.NumberStyles.HexNumber);
}catch{
// Rethrow an exception with custom message.
throw
new ArgumentException("hex is not a valid hex number!",
"hex");
}
}
System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
return chs.GetString(bytes);
}
//上述文章為轉載!