1. 程式人生 > >C# 16進位制與字串、位元組陣列之間的轉換(轉)

C# 16進位制與字串、位元組陣列之間的轉換(轉)

1.請問c#中如何將十進位制數的字串轉化成十六進位制數的字串

//十進位制轉二進位制
Console.WriteLine("十進位制166的二進位制表示: "+Convert.ToString(166, 2));
//十進位制轉八進位制
Console.WriteLine("十進位制166的八進位制表示: "+Convert.ToString(166, 8));
//十進位制轉十六進位制
Console.WriteLine("十進位制166的十六進位制表示: "+Convert.ToString(166, 16));
    
//二進位制轉十進位制
Console.WriteLine("二進位制 111101 的十進位制表示: "+Convert.ToInt32("111101", 2));
//八進位制轉十進位制
Console.WriteLine("八進位制 44 的十進位制表示: "+Convert.ToInt32("44", 8));
//十六進位制轉十進位制
Console.WriteLine("十六進位制 CC的十進位制表示: "+Convert.ToInt32("CC", 16));

2.在串列埠通訊過程中,經常要用到 16進位制與字串、位元組陣列之間的轉換
//

private string StringToHexString(string s,Encoding encode)
        {
            byte[] b = encode.GetBytes(s);//按照指定編碼將string程式設計位元組陣列
            string result = string.Empty;
            for (int i = 0; i < b.Length; i++)//逐位元組變為16進位制字元,以%隔開
            {
                result += "%"+Convert.ToString(b[i], 16);
            }
            return result;
        }
        private string HexStringToString(string hs, Encoding encode)
        {
            //以%分割字串,並去掉空字元
            string[] chars = hs.Split(new char[]{'%'},StringSplitOptions.RemoveEmptyEntries);
            byte[] b = new byte[chars.Length];
            //逐個字元變為16進位制位元組資料
            for (int i = 0; i < chars.Length; i++)
            {
                b[i] = Convert.ToByte(chars[i], 16);
            }
            //按照指定編碼將位元組陣列變為字串
            return encode.GetString(b);
        }

字串轉16進位制位元組陣列
        ///
        
/// 字串轉16進位制位元組陣列
        
///

       
/// 
        
/// 

        
private static byte[] strToToHexByte(
string  hexString)
        
{
             hexString 
 hexString.Replace(" ""word-wrap: break-word; color: rgb(128, 0, 0);">"");
           
if ((hexString.Length % 2!= 0)
                 hexString 
+= " ";
            
byte[] returnBytes = new byte[hexString.Length / 2];
            
for (int i > 0"word-wrap: break-word; color: rgb(0, 0, 0);">; i < returnBytes.Length; i++)
                returnBytes[i] 
= Convert.ToByte(hexString.Substring(i * 22), 16);
            
return returnBytes;
         }

位元組陣列轉16進位制字串
///
        
/// 位元組陣列轉16進位制字串
        
///

        
/// 
        
/// 

        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;
         }

從漢字轉換到16進位制
///
        
/// 從漢字轉換到16進位制
        
///

        
/// 
        
/// 編碼,如"utf-8","gb2312"
        
/// 是否每字元用逗號分隔
       
/// 

        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進位制轉換成漢字
///


        
///  從16進位制轉換成漢字
        
///
        
///  
        
///   編碼,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
             }

            
//  需要將 hex 轉換成 byte 陣列。 
             byte [] bytes  =   new &nbsq; byte [hex.Length  /   2 ];

           
for  ( int  i  =   0 ; i  <  bytes.Length; i ++ )
            
{
                
try
                
{
                    
// 每兩個字元是一個 byte。 
                     bytes[i] = byte.Parse(hex.Substring(i * 22),
                     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);
         }