Welcome!

Big Data Journal Authors: Greg Ness, Yeshim Deniz, Mat Mathews, Pat Romanski, Carmen Gonzalez

Blog Feed Post

Android to Windows Phone 8: Working with a SQL Database

Over the next several posts I’ll show you how to work with local data on the Windows Phone 8 platform and compare it to working with data on the Android platform.

There are times when key-value pairs and/or files won’t meet your need for data storage. Specifically, when you’re dealing with structured data that is repeated, such as events on a calendar. For this type of information you’ll want to use a relational store. This relational store is typically a SQL database. Both Android and Windows Phone 8 support using the SQLite relational database engine. This section assumes you have familiarity working with SQLite on Android.

Installing SQLite

The first thing you’ll need to do is install the SQLite for Windows Phone apps. This can be done by downloading the SQLite for Windows Phone package

  1. In Visual Studio, click the Tools menu, then click Extensions and Updates

  2. In the tree on the left of the Extensions and Updates window, click Online, then click Visual Studio Gallery.
  3. Next, type sqlite in the search box in the upper right hand corner and press Enter.
  4. The SQLite for Windows Phone package should appear. Click Download.

  5. You will then be prompted to click Install. Do so.

  6. Once the package is installed you will need to restart Visual Studio
ANDROID HINT
The SQLite for Windows Package package is similar to the android.database.sqlite package.

Adding a Reference to SQLite

Now that SQLite is installed you need to add a reference to it from you project.

  1. Right click the References folder in your Windows Phone project and click Add Reference…

  2. In the tree on the left hand side of the Reference Manager windows, expand the Windows Phone and the Extensions nodes.
  3. Then select both the SQLite for Windows Phone and click OK.

  4. You should now see the extension appear under the References folder for you project.

Getting Helper Classes

The last thing you’ll want to do is obtain some helper classes that make working with SQLite a bit easier. There are a number available for Windows Phone applications. The ones I prefer to use come from the sqlite-net library.

The sqlite-net library can be obtained from NuGet via the following steps

VISUAL STUDIO TIP
NuGet is a free and open source package manager for the .NET Framework.
  1. Right click on the References folder in you Windows Phone project and click Manage NuGet Packages…


  2. Expand the Online node in the left hand side of the Window.
  3. Enter sqlite in the search box in the upper right hand side of Window and press Enter.
  4. Select sqlite-net and click Install.


  5. Two source files will be added to your project: SQLite.cs and SQLiteAsync.cs.


  6. If you look in your Error List you’ll see a number of errors. This is due the fact that sqlite-net is dependent on csharp-sqlite which has not been ported to Windows Phone 8.


  7. To work around this you’ll need to use the sqlite-net-wp8 native C++ project. You’ll first need to go to the project’s repository on github and download the zip version of the repository.


  8. Right-click the downloaded zip file, click Properties, click Unblock, and click OK.


  9. Unzip the content.
  10. In the Solution Explorer in Visual Studio, right-click the solution and choose Add, then choose Existing Project.


  11. In the Add Existing Project dialog, brose to the location where you unzipped the content in step, select the Sqlite.vcxproj file, and click Open.


  12. You should now see the Sqlite project in your solution.


  13. You now need to add a reference to the Sqlite project to your Windows Phone project. Right-click the References folder of your Windows Phone project and click Add


  14. In the Reference Manager dialog select Solution from the tree on the left-had side, select Projects.
  15. Check the box next to the Sqlite project and click OK.


  16. The last step is to add a compiler directive to the Windows Phone project. Right-click the Windows Phone project in Solution Explorer and click Properties


  17. Click Build and add the following to the conditional compilation symbols text box: ;USE_WP8_NATIVE_SQLITE


  18. Build your solution by pressing F6. You should now see a Build succeeded message and no errors in the Error List.


Using SQLite

In the last part of this section we’ll look at how to perform some basic tasks with SQLite in your Windows Phone application.

Creating a Table

The first step you’ll need to take is to create a table that your application will use. For the sake of example, let’s say your application is storing blog posts in a SQLite table. Using the sqlite-net package you obtained in the last section, you can define the table by simply writing a class.

public class Post
{
 [PrimaryKey]
 public int Id { get; set; }
 public string Title { get; set; }
 public string Text { get; set; }
}

The PrimaryKey attributes come from the sqlite-net package. There are a number of attributes that the package provides that allow you to define the table’s schema.

Once the table is defined it needs to be created, which can be done like this:

private async void CreateTable()
{
 SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
 await conn.CreateTableAsync<Post>();
}

The “blog” parameter in the constructor for the SQLiteAsyncConnection class simply specifies the path to the SQLite database.

The Post type specified in the call to the CreateTableAsync method specifies the type of table that should be created. This maps back to the Post class created earlier.

Android tip
In Android you would create a table that extends the SQLiteOpenHelper class that contains the following method:

public void onCreate(SQLiteDatabase db) {  
 db.execSQL("CREATE TABLE Post ( Id INTEGER PRIMARY KEY, Title TEXT, Text TEXT )");
}
Inserting a Record

Now that the table is created, records can be added to it with the following code:

public async void InsertPost(Post post)
{
 SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
 await conn.InsertAsync(post);
}
ANDROID HINT
In Android you could insert the record with the following code:

public void insertPost(SQLiteDatabase db, String title, String text ) { 
 ContentValues values = new ContentValues();
 values.put("Title", title);
 values.put("Text", text);
 long newRowId;
 newRowId = db.insert("Post", null, values);
}
Retrieving Records

Retrieve all records from the table with the following:

public async Task<List<Post>> GetPosts()
{
 SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
 var query = conn.Table<Post>();
 var result = await query.ToListAsync();
 return result;
}
ANDROID HINT
In Android you could return a Cursor object containing all records using the following:

public Cursor getPosts(SQLiteDatabase db){
 String[] projection = {"Id", "Title", "Text" };
 Cursor c = db.query("Post", projection, null, null, null, null, null);
 return c;
}

Retrieve a single record from the table with the following:

public async Task<Post> GetPost(int id)
{ 
 SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
 var query = conn.Table<Post>().Where(x => x.Id == id);
 var result = await query.ToListAsync();
 return result.FirstOrDefault();
}
ANDROID HINT
The following will retrieve a single record in Android:

public Cursor getPost(SQLiteDatabase db, Integer id){
 String[] projection = {"Id", "Title", "Text" };
 String selection = "Id LIKE ?";
 String[] selelectionArgs = { String.valueOf(id) };
 Cursor c = db.query( "Post", projection, selection, selectionArgs, null, null, null);
 return c;
}
Updating a Record

Updating a record requires the following code:

public async void UpdatePost(Post post)
{
 SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
 await conn.UpdateAsync(post);
}
ANDROID HINT
In Android you could update the record with the following code:

public void updatePost(SQLiteDatabase db, Integer id, String title, String text ) {
 ContentValues values = new ContentValues();
 values.put("Title", title);
 values.put("Text", text);
 String selection = "Id LIKE ?";
 String[] selelectionArgs = { String.valueOf(id) };
 int count = db.update("Post, values, selection, selectionArgs);
}
Deleting a Record

A record can be delete with the following:

public async void DeletePost(Post post)
{
 SQLiteAsyncConnection conn = new SQLiteAsyncConnection("blog");
 await conn.DeleteAsync(post);
}
ANDROID HINT
In Android you could delete the record with the following code:

public void deletePost(SQLiteDatabase db, Integer id ) {  
 String selection = "Id LIKE ?";
 String[] selelectionArgs = { String.valueOf(id) };
 db.delete("Post", selection, selectionArgs);
}

Additional Resources

Read the original blog entry...

More Stories By Adam Grocholski

Hey there! My name is Adam Grocholski, and I'm a Technical Evangelist at Microsoft where I spend time focusing on Windows, Windows Phone, and Windows Azure. I live in the frozen tundra of Minnesota and run thinkfirstcodelater.com. You can also follow me on twitter at @codel8r.

@BigDataExpo Stories
The definition of IoT is not new, in fact it’s been around for over a decade. What has changed is the public's awareness that the technology we use on a daily basis has caught up on the vision of an always on, always connected world. If you look into the details of what comprises the IoT, you’ll see that it includes everything from cloud computing, Big Data analytics, “Things,” Web communication, applications, network, storage, etc. It is essentially including everything connected online from ha...
Cloud Expo 2014 TV commercials will feature @ThingsExpo, which was launched in June, 2014 at New York City's Javits Center as the largest 'Internet of Things' event in the world.
An entirely new security model is needed for the Internet of Things, or is it? Can we save some old and tested controls for this new and different environment? In his session at @ThingsExpo, New York's at the Javits Center, Davi Ottenheimer, EMC Senior Director of Trust, reviewed hands-on lessons with IoT devices and reveal a new risk balance you might not expect. Davi Ottenheimer, EMC Senior Director of Trust, has more than nineteen years' experience managing global security operations and asse...

ARMONK, N.Y., Nov. 20, 2014 /PRNewswire/ --  IBM (NYSE: IBM) today announced that it is bringing a greater level of control, security and flexibility to cloud-based application development and delivery with a single-tenant version of Bluemix, IBM's

The major cloud platforms defy a simple, side-by-side analysis. Each of the major IaaS public-cloud platforms offers their own unique strengths and functionality. Options for on-site private cloud are diverse as well, and must be designed and deployed while taking existing legacy architecture and infrastructure into account. Then the reality is that most enterprises are embarking on a hybrid cloud strategy and programs. In this Power Panel at 15th Cloud Expo (http://www.CloudComputingExpo.com...
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In his session at Internet of @ThingsExpo, James Kirkland, Chief Ar...
Technology is enabling a new approach to collecting and using data. This approach, commonly referred to as the "Internet of Things" (IoT), enables businesses to use real-time data from all sorts of things including machines, devices and sensors to make better decisions, improve customer service, and lower the risk in the creation of new revenue opportunities. In his General Session at Internet of @ThingsExpo, Dave Wagstaff, Vice President and Chief Architect at BSQUARE Corporation, discuss the ...
The security devil is always in the details of the attack: the ones you've endured, the ones you prepare yourself to fend off, and the ones that, you fear, will catch you completely unaware and defenseless. The Internet of Things (IoT) is nothing if not an endless proliferation of details. It's the vision of a world in which continuous Internet connectivity and addressability is embedded into a growing range of human artifacts, into the natural world, and even into our smartphones, appliances, a...
"BSQUARE is in the business of selling software solutions for smart connected devices. It's obvious that IoT has moved from being a technology to being a fundamental part of business, and in the last 18 months people have said let's figure out how to do it and let's put some focus on it, " explained Dave Wagstaff, VP & Chief Architect, at BSQUARE Corporation, in this SYS-CON.tv interview at @ThingsExpo, held Nov 4-6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
The 4th International DevOps Summit, co-located with16th International Cloud Expo – being held June 9-11, 2015, at the Javits Center in New York City, NY – announces that its Call for Papers is now open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the world's large...
The 3rd International @ThingsExpo, co-located with the 16th International Cloud Expo - to be held June 9-11, 2015, at the Javits Center in New York City, NY - announces that it is now accepting Keynote Proposals. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devices - computers, smartphones, tablets, and sensors - connected to th...
As cloud gives an opportunity to businesses to buy services externally – how is cloud impacting your customers? In his General Session at 15th Cloud Expo, Fabio Gori, Director of Worldwide Cloud Marketing at Cisco, provided answers to big questions: Do you see hybrid cloud as where the world is going? What benefits does it bring? And how does Cisco connect all of these clouds? He also discussed Intercloud and Cisco’s investment on it.
SYS-CON Events announced today that Windstream, a leading provider of advanced network and cloud communications, has been named “Silver Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9–11, 2015, at the Javits Center in New York, NY. Windstream (Nasdaq: WIN), a FORTUNE 500 and S&P 500 company, is a leading provider of advanced network communications, including cloud computing and managed services, to businesses nationwide. The company also offers broadband, p...
Working with Big Data is challenging, especially when decision makers depend on market insights and intelligence from your data but don't have quick access to it or find it unusable. In their session at 6th Big Data Expo, Ian Khan, Global Strategic Positioning & Brand Manager at Solgenia; Zel Bianco, President, CEO and Co-Founder of Interactive Edge of Solgenia; and Ermanno Bonifazi, CEO & Founder at Solgenia, discussed how a revolutionary cloud-based BI along with mobile analytics is already c...
There is no doubt that Big Data is here and getting bigger every day. Building a Big Data infrastructure today is no easy task. There are an enormous number of choices for database engines and technologies. To make things even more challenging, requirements are getting more sophisticated, and the standard paradigm of supporting historical analytics queries is often just one facet of what is needed. As Big Data growth continues, organizations are demanding real-time access to data, allowing immed...
Vichara Technologies in Hoboken, New Jersey is expanding its capabilities in big data from origins on Wall Street into other areas, and thereby demonstrating the growing marketplace for advanced big-data analytics services. The next BriefingsDirect deep-dive big data benefits case study interview explores how Vichara Technologies in Hoboken, New Jersey is expanding its capabilities in big data from origins on Wall Street into other areas, and thereby demonstrating the growing marketplace for ad...
Moscow-based OpenBank, one of the largest private financial services groups in Russia, has built out a business intelligence capability for wholly new business activity monitoring benefits. The next BriefingsDirect deep-dive big data benefits case study interview explores how Moscow-based Otkritie Bank, one of the largest private financial services groups in Russia, has built out a business intelligence (BI) capability for wholly new business activity monitoring (BAM) benefits. The use of HP V...
The 3rd International Internet of @ThingsExpo, co-located with the 16th International Cloud Expo - to be held June 9-11, 2015, at the Javits Center in New York City, NY - announces that its Call for Papers is now open. The Internet of Things (IoT) is the biggest idea since the creation of the Worldwide Web more than 20 years ago.
Scene scenario: 10 am in a boardroom somewhere, second round of coffees served, Danish and donuts untouched, a quiet hush settles. “Well you know what guys? (and, by the use of the term guys I mean to include both sexes here assembled) – the trouble that we have as a company is that we are, to put it bluntly, just a little analytics poor,” said the newly appointed Chief Analytics Officer. That we should consider a firm to be analytically deficient or poor is a profound comment on our modern ag...
Quantum is a leading expert in scale-out storage, archive and data protection, providing intelligent solutions for capturing, sharing and preserving digital assets over the entire data lifecyle. They help customers maximize the value of these assets to achieve their goals, whether it’s top movie studios looking to create the next blockbuster, researchers working to accelerate scientific discovery, or small businesses trying to streamline their operations. With a comprehensive portfolio of best-i...