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SQLite and the .NET Framework. This PPT: Http://www.eggheadcafe.com/articles/SQLite.ppt. What is SQLite?. SQLite is a small C library that implements a self-contained, embeddable, zero-configuration SQL database engine.

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Sqlite and the net framework l.jpg

SQLite and the .NET Framework

This PPT: Http://www.eggheadcafe.com/articles/SQLite.ppt


What is sqlite l.jpg
What is SQLite?

  • SQLite is a small C library that implements a self-contained, embeddable, zero-configuration SQL database engine.

    • Transactions are atomic, consistent, isolated, and durable (ACID) even after system crashes and power failures.

    • Zero-configuration - no setup or administration needed.

    • Implements most of SQL92.

    • A complete database is stored in a single disk file.

    • Database files can be freely shared between machines with different byte orders.

    • Supports databases up to 2 terabytes (241 bytes) in size.

    • Sizes of strings and BLOBs limited only by available memory.


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What is SQLite – continued

  • Faster than popular client/server database engines for most common operations.

  • Simple, easy to use API.

  • Bindings for many languages available

  • Well-commented source code with over 95% test coverage.

  • Self-contained: no external dependencies.

  • Sources are in the public domain. Use for any purpose.

  • There is now a robust SQLite.NET ADO.NET provider!

  • Small code footprint: less than 30K lines of C code, less than 250KB code space

  • Installation: Just set “Build Action” to “Content” on Database file!


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More SQLite Features

  • Create Database Programmatically in Connection string

    • No need to distribute or install database

    • SQL to create database, tables, triggers can be embedded

  • Triggers

    • Triggers can be used to handle many of the functions of stored procedures.

  • Vacuum

    • Just like “Compact Database” in MS Access.


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The SQLite ADO.NET Provider

  • Conforms to normal ADO.NET Best practices

  • Offers:

    • SQLiteConnection

    • SQLiteCommand - all Methods except “Xml”

    • SQLiteDataAdapter

    • SQLiteCommandBuilder

    • Supports NTFS compression of Database File


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SQLite 3.0 ODBC Driver

  • Http://www.ch-werner.de/sqliteodbc/html/

  • This is an experimental open source ODBC driver for the wonderful SQLite 2.8.* and SQLite 3.* (alpha) Database Engine/Library. So far it is more a proof of concept and might contain lots of memory leaks and all other kinds of bugs. Thus I highly appreciate feedback.

  • WIN32 binaries (the ODBC driver DLL, install/uninstall programs) are in http://www.ch-werner.de/sqliteodbc/sqliteodbc-win32.zip

  • It works! It is SLOOOOW!


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SQLite in Action: A First Look

private void CreateDatabase()

{

SQLiteConnection Conn = new SQLiteConnection();

string strPath=Server.MapPath("blog.db");

Conn.ConnectionString = "Data Source="+strPath+"; Compress=False;Synchronous=Off;New=True;Version=3";

Conn.Open();

SQLiteCommand Cmd = new SQLiteCommand();

Cmd = Conn.CreateCommand();

Cmd.CommandText="CREATE TABLE BlogItems (Blogid integer primary key , title varchar(250), link varchar(300), [description] varchar(8000), pubDate datetime, guid varchar(128), [public] integer )";

Cmd.ExecuteNonQuery(); . . . .


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Important Scenarios

  • Mobile Code

    • Device-hosted applications

    • Database runs 100% on Device

    • “Zero configuration” installation

    • NO Client License Fees

  • Server / Desktop Code

    • Alternative to MSDE, MSAccess, MySql

    • No installation Required

    • Fast database engine

    • MultiThreaded


Mobile code scenario l.jpg
Mobile Code Scenario

  • Advantages of mobile code database

    • Executes locally for performance and rich features

    • Can use a WebService to receive “GetChanges” DataSets to update database on server

    • No dependency on “what kind” of database is used on the server.

    • No complicated Server configuration

    • No Client license fees to use SQLite



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URLS - Articles and Sample Code!

  • ASP.NET CacheDependency:http://www.eggheadcafe.com/articles/20040916.asp

  • SQLite DB and SQLiteBlog:

  • http://www.eggheadcafe.com/articles/20040714.asp

  • .Net Forum Control with SQLite: http://www.eggheadcafe.com/articles/20041009.asp

  • SQLite Compact Framework: http://www.eggheadcafe.com/articles/sqlitecf3.zip


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