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
///
/// 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
///
/// 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
///
/// 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();
}
16进制转换成汉字
///
/// 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);
}