Realm is a mobile database that runs directly inside phones, tablets or wearables.
This library extends the Realm mobile database to provide convenient key/value based storage. This is useful in situations where you have one-off or single pieces of data like:
- user information (name, last login timestamp, pin code, etc.)
- settings/preferences
- temporary data
This library is a lightweight wrapper around Realm so be sure to check out the official Realm .NET repository for documentation and examples on advanced querying and usage of Realm.
// Get a KeyValueRealm instance
var realm = KeyValueRealm.GetInstance();
// Save some values
realm.Set("First Name", "John");
realm.Set("PinCode", 1234);
// Retrieve the pin code strongly typed as an integer
var pinCode = realm.Get<int>("PinCode"); // pinCode == 1234
// Remove the first name
realm.Remove("First Name");
var firstName = realm.Get("firstName"); // firstName == null
// Set a key named "Married" that expires two days from now
realm.Set("Married", true, DateTimeOffset.Now.AddDays(2));KeyValueRealm is a lightweight wrapper around a standard Realm object providing convenience methods specifically optimized for working with key/value based storage.
You call KeyValueRealm.GetInstance() to retrieve an instance, optionally passing the same types of parameters as you would when calling Realm.GetInstance() normally. You have complete control of the underlying Realm. This class just makes it easier to work with keys and values.
A KeyValueItem is a Realm object that contains Key, Value, and ExpiresOn fields. This is the main object you interact with and use with a KeyValueRealm to save the item. There are convenience methods as shown in the Getting Started section above that handle creating and modifying these objects for you.
Keys can be set to expire after a specified time. If a key is queried and it is after it's expiration, it will be removed from the database and null will be returned.
Realm Key Value Storage is licensed the same as the Realm project. Realm Key Value Storage is published under the Apache 2.0 license.