苏飞论坛

标题: C# 16进制与字符串、字节数组,汉字之间的转换 [打印本页]

作者: 站长苏飞 时间: 2013-3-21 17:23
标题: C# 16进制与字符串、字节数组,汉字之间的转换
今天见群里有人问为什么不把类型转化的收录到基类库里，其实我认为这些是不应该收录的，不过有人问到，我发一些资源做为参考吧
方式如下
从字节转16进制
[code=csharp]byte[] b = {12,10,1,17};
  string a ="";
         for (int i = 0; i < b.Length; i++)
         {
            a +=Convert.ToString(b, 16);
         ｝[/code]

[code=csharp]/// <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 = 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.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);
      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 = 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);
}[/code]

欢迎光临苏飞论坛 (http://www.sufeinet.com/)