C# 16进制与字符串、字节数组之间的转换

summary>
/// 字符串转16进制字节数组
/// </summary>
/// <param
name="hexString"></param>
/// <returns></returns>
//十六进制组成的字符串转成byte[]
private static byte[] strToToHexByte(string hexString)
{
hexString =
hexString.Replace(" ", "");
if ((hexString.Length % 2) != 0)
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;
}

字节数组转16进制字符串
/// <summary>
/// 字节数组转16进制字符串
///
</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;
}
从汉字转换到16进制

/// <summary>
/// 从汉字转换到16进制
/// </summary>
///
<param name="s"></param>
/// <param
name="charset">编码,如"utf-8","gb2312"</param>
/// <param
name="fenge">是否每字符用逗号分隔</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();
}

16进制转换成汉字
///<summary>
/// 从16进制转换成汉字
/// </summary>

/// <param name="hex"></param>
/// <param
name="charset">编码,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
}
// 需要将
hex 转换成 byte 数组。
byte[] bytes = new byte[hex.Length / 2];
for (int i =
0; i < bytes.Length; i++)
{
try
{
// 每两个字符是一个 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);

}