A lightweight cross-platform replacement for System.Data.SQLite

This is an independent implementation of the core of ADO.NET: IDbConnection, IDbCommand, IDbDataReader, IDbTransaction (plus a few helpers) — enough types to let you create and query SQLite databases from managed code, including support for libraries such as Dapper.

It supports the following platforms: .NET 4.5 (Any CPU), Xamarin.iOS, PCL, MonoTouch, MonoAndroid.

If you’re looking for the official ADO.NET wrapper for SQLite, it can be found at http://system.data.sqlite.org/.

Build Status

Why?

1. Lightweight

• Only the core of ADO.NET is implemented, not EF or Designer types.
• The official System.Data.SQLite is 276KB; this library is under 50KB.

2. High performance

• This library assumes that the caller will use IDisposable properly, so it avoids adding finalizers to clean up incorrect usage.
• No static constructors (e.g., SQLiteFunction) that reflect over all loaded assemblies.

3. Cross-platform support

• Works on desktop and mobile devices

4. Tested

• This implementation has been shipping in Logos 6 and installed on tens of thousands of client machines. The developers track and fix crashes reported via Raygun.

Enhancements

• DbDataReader.ReadAsync(CancellationToken) is overridden to support cancellation from another thread (via sqlite3_interrupt).
• Added SQLiteConnection.StatementCompleted to return the results of sqlite3_profile.

Compatibility

This library is generally compatible with the official System.Data.SQLite API, but a few changes were made where necessary:

• SQLiteConnectionStringBuilder does not support all the official connection string properties.
• SQLiteDataReader performs fewer implicit conversions.
• Not all SQL type aliases (text, int, blob, etc.) are supported.

This wrapper is managed-only; you still need a copy of the native SQLite library. A recent copy is provided in the lib folder (for the unit tests).

Async

This library implements all the *Async methods of DbCommand, etc. However, because SQLite itself performs synchronous I/O (and it would be extremely difficult to make it truly async), they don't actually have an async implementation, but will run synchronously. (Using Task.Run in the implementation is a bad idea; see also here and here.) If you need to perform database work off the UI thread, use Task.Run in the UI code to execute a series of SQLite calls on a background thread.

The *Async methods do support cancellation, though. If you pass in a CancellationToken, the methods will still run synchronously, but you can interrupt them (even if they're in a long-running loop in SQLite's native code) by cancelling the cancellation token from another thread. (For example, you can cancel DB work that's happening on a threadpool thread when a user clicks a "Cancel" button in the UI.)