Este codigo es útil para la detección del tipo de codificacion de los ficheros.
/// <summary>
/// Detects the byte order mark of a file and returns an appropriate encoding for the file.
/// </summary>
/// <param name=»srcFile»></param>
/// <returns></returns>
public static Encoding GetFileEncoding(string srcFile)
{
// *** Use Default of Encoding.Default (Ansi CodePage)
Encoding enc = Encoding.Default;
// *** Detect byte order mark if any – otherwise assume default
byte[] buffer = new byte[5];
FileStream file = new FileStream(srcFile, FileMode.Open);
file.Read(buffer, 0, 5);
file.Close();
if (buffer[0] == 0xef && buffer[1] == 0xbb && buffer[2] == 0xbf)
enc = Encoding.UTF8;
else if (buffer[0] == 0xfe && buffer[1] == 0xff)
enc = Encoding.Unicode;
else if (buffer[0] == 0 && buffer[1] == 0 && buffer[2] == 0xfe && buffer[3] == 0xff)
enc = Encoding.UTF32;
else if (buffer[0] == 0x2b && buffer[1] == 0x2f && buffer[2] == 0x76)
enc = Encoding.UTF7;
return enc;
}
Ejemplo:
/// <summary>
/// Opens a stream reader with the appropriate text encoding applied.
/// </summary>
/// <param name=»srcFile»></param>
public static StreamReader OpenStreamReaderWithEncoding(string srcFile)
{
Encoding enc = GetFileEncoding(srcFile);
return new StreamReader(srcFile, enc);
}
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