C# 16进制与字符串、字节数组之间的转换
1.請問c#中如何將十進制數的字符串轉化成十六進制數的字符串
//十進制轉二進制
Console.WriteLine("十進制166的二進制表示: "+Convert.ToString(166, 2));
//十進制轉八進制
Console.WriteLine("十進制166的八進制表示: "+Convert.ToString(166, 8));
//十進制轉十六進制
Console.WriteLine("十進制166的十六進制表示: "+Convert.ToString(166, 16));
//二進制轉十進制
Console.WriteLine("二進制 111101 的十進制表示: "+Convert.ToInt32("111101", 2));
//八進制轉十進制
Console.WriteLine("八進制 44 的十進制表示: "+Convert.ToInt32("44", 8));
//十六進制轉十進制
Console.WriteLine("十六進制 CC的十進制表示: "+Convert.ToInt32("CC", 16));
2.在串口通訊過程中，經常要用到 16進制與字符串、字節數組之間的轉換
//
private string StringToHexString(string s,Encoding encode)
{
byte[] b = encode.GetBytes(s);//按照指定編碼將string編程字節數組
string result = string.Empty;
for (int i = 0; i < b.Length; i++)//逐字節變為16進制字符，以%隔開
{
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];
//逐個字符變為16進制字節數據
for (int i = 0; i < chars.Length; i++)
{
b[i] = Convert.ToByte(chars[i], 16);
}
//按照指定編碼將字節數組變為字符串
return encode.GetString(b);
}
/// <summary>
/// 字符串轉16進制字節數組
/// </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;
}
/// <summary>
/// 字節數組轉16進制字符串
/// </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;
}
/// <summary>
/// 從漢字轉換到16進制
/// </summary>
/// <param name="s"></param>
/// <param name="charset">編碼,如"utf-8","gb2312"</param>
/// <param name="fenge">是否每字符用逗號分隔</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 數組。
byte[] bytes = new byte[hex.Length / 2];
for (int i = 0; i < bytes.Length; i++)
{
try
{
// 每兩個字符是一個 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);
}