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>

privatestaticbyte[] strToToHexByte(string hexString) 

{ 

hexString = hexString.Replace("","");

if ((hexString.Length%2)!=0)

hexString +="";

byte[] returnBytes=newbyte[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>

publicstaticstring 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>

publicstaticstring 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>

publicstaticstring UnHex(string hex, string charset)

{ 

if (hex==null)

thrownew 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 =newbyte[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. 

thrownew ArgumentException("hex is not a valid hex number!","hex");

} 

} 

System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);

return chs.GetString(bytes);

}