C# 16进制与字符串、字节数组之间的转换
1.请问c#中如何将十进制数的字符串转化成十六进制数的字符串
//十进制转二进制
Console.WriteLine("十进制166的二进制表示: "+Convert.ToString(166, 2));
//十进制转八进制
Console.WriteLine("十进制166的八进制表示: "+Convert.ToString(166, 8));
//十进制转十六进制
Console.WriteLine("十进制166的十六进制表示: "+Convert.ToString(166, 16));
//二进制转十进制
Console.WriteLine("二进制111101 的十进制表示: "+Convert.ToInt32("111101", 2)); //八进制转十进制
Console.WriteLine("八进制44 的十进制表示: "+Convert.ToInt32("44", 8));
//十六进制转十进制
Console.WriteLine("十六进制CC的十进制表示: "+Convert.ToInt32("CC", 16));
2.在串口通讯过程中，经常要用到16进制与字符串、字节数组之间的转换
//
private string StringToHexString(string s,Encoding encode)
{
byte[] b = encode.GetBytes(s);//按照指定编码将string编程字节数组
string result = string.Empty;
for (int i = 0; i < b.Length; i++)//逐字节变为16进制字符，以%隔开
{
result += "%"+Convert.ToString(b[i], 16);
}
return result;
}
private string HexStringToString(string hs, Encoding encode)
{
//以%分割字符串，并去掉空字符
string[] chars = hs.Split(new
char[]{'%'},StringSplitOptions.RemoveEmptyEntries);
byte[] b = new byte[chars.Length];
//逐个字符变为16进制字节数据
for (int i = 0; i < chars.Length; i++)
{
b[i] = Convert.ToByte(chars[i], 16);
}
//按照指定编码将字节数组变为字符串
return encode.GetString(b);
}
///
///字符串转16进制字节数组
///
///
///
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
///
///
///
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
///
///
///编码,如"utf-8","gb2312"
///是否每字符用逗号分隔
///
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();
}
///
///从16进制转换成汉字
///
///
///编码,如"utf-8","gb2312" ///
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);
}