本文实例讲述了C#简单判断字符编码的方法。分享给大家供大家参考，具体如下：
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public static string GetText(byte[] buff)
{
string strReslut = string.Empty;
if (buff.Length > 3)
{
if (buff[0] == 239 && buff[1] == 187 && buff[2] == 191)
{// utf-8
strReslut = Encoding.UTF8.GetString(buff);
}
else if (buff[0] == 254 && buff[1] == 255)
{// big endian unicode
strReslut = Encoding.BigEndianUnicode.GetString(buff);
}
else if (buff[0] == 255 && buff[1] == 254)
{// unicode
strReslut = Encoding.Unicode.GetString(buff);
}
else if (isUtf8(buff))
{// utf-8
strReslut = Encoding.UTF8.GetString(buff);
}
else
{// ansi
strReslut = Encoding.Default.GetString(buff);
}
}
return strReslut;
}
// 110XXXXX, 10XXXXXX
// 1110XXXX, 10XXXXXX, 10XXXXXX
// 11110XXX, 10XXXXXX, 10XXXXXX, 10XXXXXX
private static bool isUtf8(byte[] buff)
{
for (int i = 0; i < buff.Length; i++)
{
if ((buff[i] & 0xE0) == 0xC0) // 110x xxxx 10xx xxxx
{
if ((buff[i + 1] & 0x80) != 0x80)
{
return false;
}
}
else if ((buff[i] & 0xF0) == 0xE0) // 1110 xxxx 10xx xxxx 10xx xxxx
{
if ((buff[i + 1] & 0x80) != 0x80 || (buff[i + 2] & 0x80) != 0x80)
{
return false;
}
}
else if ((buff[i] & 0xF8) == 0xF0) // 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx
{
if ((buff[i + 1] & 0x80) != 0x80 || (buff[i + 2] & 0x80) != 0x80 || (buff[i + 3] & 0x80) != 0x80)
{
return false;
}
}
}
return true;
}
// news.sohu.com
private static bool isGBK(byte[] buff)
{
return false;
}
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希望本文所述对大家C#程序设计有所帮助。