C#16进制与字符串、字节数组之间的转换（转载）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
///<summary>
///字符串转16进制字节数组
///</summary>
///<param name="hexString"></param>
///<returns></returns>
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
{
逗号分割字符串转数组// 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);
}
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