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2010-07-26 13:51:24

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);
         }

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