On Mon, 22 Mar 2010 03:41:04 +0100, moebius206 <nwe...@gmail.com> wrote:
public class User
{
public virtual IDictionary<string, object> Preferences { get;
set; }
}
with its usage as:
user.Preferences["preference1"] = "some value";
user.Preferences["preference2"] = 10;
user.Preferences["preference3"] = true;
...
Maybe there's a better way to do this, or maybe I should just suck it
up and use IDictionary<string, string>. Any ideas?
Yes, let NHibernate deal with strings to and from the database and do the
conversion yourself. Since you're already storing the value's System.Type,
it's easy.
Map the dictionary as a protected property expose its values through
methods like GetPreference<T>(key) and SetPreference<T>(key, value) so you
can work with the values in a typed way in your application.
The code inside GetPreference would look a little something like this:
TypeConverter converter = TypeDescriptor.GetConverter(ValueType);
return (T) converter.ConvertFromString(StringValue);
And in SetPreference() you would basically do the opposite (with
ConvertToString() instead).
Another option is to have a custom implementation of IDictionary<string,
string> with the same logic exposed within it (instead of in the User
class). Either way, the code to store and retrieve values would be the
same.
Depending on your needs, you might want to store XML instead of "dumb
strings" in your database, and then you would do XML serialization and
deserialization in the Get and Set methods instead. The basic idea is
still the same. If all you want to store is simple types,
ConvertFromString and ConvertToString should suit your needs just fine.
--
Asbjørn Ulsberg -=|=- asbj...@ulsberg.no
«He's a loathsome offensive brute, yet I can't look away»
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