C#中string与byte[]的转换帮助类-.NET教程,C#语言

主要实现了以下的函数
代码中出现的sidle是我的网名。

/**//*
* @author wuerping
* @version 1.0
* @date 2004/11/30
* @description:
*/
using system;
using system.text;
namespace sidlehelper
{
/**//// <summary>
/// summary description for strhelper.
/// 命名缩写：
/// str: unicode string
/// arr: unicode array
/// hex: 二进制数据
/// hexbin: 二进制数据用ascii字符表示 例 字符1的hex是0x31表示为hexbin是 31
/// asc: ascii
/// uni: unicode
/// </summary>
public sealed class strhelper
{
hex与hexbin的转换#region hex与hexbin的转换
public static void hexbin2hex(byte[] bhexbin, byte[] bhex, int nlen)
{
for(int i=0; i<nlen/2; i++)
{
if(bhexbin[2*i] <0x41)
{
bhex[i] = convert.tobyte(((bhexbin[2*i] - 0x30)<<4) & 0xf0);
}
else
{
bhex[i] = convert.tobyte(((bhexbin[2*i] - 0x37)<<4) & 0xf0);
}

if(bhexbin[2*i+1] <0x41)
{
bhex[i] |= convert.tobyte((bhexbin[2*i+1] - 0x30) & 0x0f);
}
else
{
bhex[i] |= convert.tobyte((bhexbin[2*i+1] - 0x37) & 0x0f);
}
}
}
public static byte[] hexbin2hex(byte[] bhexbin, int nlen)
{
if(nlen%2 !=0)
return null;
byte[] bhex = new byte[nlen/2];
hexbin2hex(bhexbin, bhex, nlen);
return bhex;
}
public static void hex2hexbin(byte[] bhex, byte[] bhexbin, int nlen)
{
byte c;
for(int i=0;i<nlen;i++)
{
c = convert.tobyte((bhex[i]>>4) & 0x0f);
if(c < 0x0a)
{
bhexbin[2*i] = convert.tobyte(c + 0x30);
}
else
{
bhexbin[2*i] = convert.tobyte(c + 0x37);
}
c = convert.tobyte(bhex[i]&0x0f);
if(c < 0x0a)
{
bhexbin[2*i+1] = convert.tobyte(c + 0x30);
}
else
{
bhexbin[2*i+1] = convert.tobyte(c + 0x37);
}
}
}
public static byte[] hex2hexbin(byte[] bhex, int nlen)
{
byte[] bhexbin = new byte[nlen*2];
hex2hexbin(bhex, bhexbin, nlen);
return bhexbin;
}
#endregion

数组和字符串之间的转化#region 数组和字符串之间的转化
public static byte[] str2arr(string s)
{
return (new unicodeencoding()).getbytes(s);
}
public static string arr2str(byte[] buffer)
{
return (new unicodeencoding()).getstring(buffer, 0, buffer.length);
}

public static byte[] str2ascarr(string s)
{
return system.text.unicodeencoding.convert(system.text.encoding.unicode,
system.text.encoding.ascii,
str2arr(s));
}

public static byte[] str2hexascarr(string s)
{
byte[] hex = str2ascarr(s);
byte[] hexbin = hex2hexbin(hex, hex.length);
return hexbin;
}
public static string ascarr2str(byte[] b)
{
return system.text.unicodeencoding.unicode.getstring(
system.text.asciiencoding.convert(system.text.encoding.ascii,
system.text.encoding.unicode,
b)
);
}

public static string hexascarr2str(byte[] buffer)
{
byte[] b = hex2hexbin(buffer, buffer.length);
return ascarr2str(b);
}
#endregion
}
}