C# 16进制与字符串、字节数组之间的转换

C# 16进制与字符串、字节数组之间的转换

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);

}

/// <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;

}

/// <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;

}

/// <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();

}

///<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);

}
//上述文章为转载!