ch: Char; begi n for ch in ListBoxl.Items.Text do if Ord (ch) >= 256 then begi n encodingl := TEncoding.UTF8; break; end;
Using similar code you could decide which format to use, depending on the situation. It might be a better idea, though, to move all of your files to Unicode encoding (UTF-8 or UTF-16), regardless of the actual data. Using UTF-16 will make the files bigger, but will also reduce the conversions when saving and loading.
However, since there is no way to specify a default conversion, going for Unicode encoding of your files would mean the need to change each and every file save operation... unless we use a trick, changing the standard
49 Checking if ch >= 256 does not work if the default code page is something other than Windows 1252. For example "Cantu" does not have any characters >= 256, but it cannot be represented in code page 1251.
behavior of the class. Such a hack could comes in the form of a class helper50. Consider the following code: type
TStringsHelper = class helper for TStrings procedure SaveToFile (const strFileName: string); end ;
const strFileName: string); begi n inherited SaveToFile (strFileName, TEncoding.UTF8); end ;
Notice that inherited here doesn't mean to call a base class but the class helped by the class helper. Now you simply write (or keep your code as): | ListBoxl.Items.SaveToFile(strFileName);
to save it as UTF-8 (or any other encoding of your choice). You'll find this code in the StreamEncoding example.
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