Error when trying to open sqlite database connection - sqlite

Question

I have an interface
SQLiteConnection _connection = Getconnection();
public SQLite.SQLiteConnection GetConnection()
{
const string sqliteFilename = "TCRMobile.db3";
string documentsPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal); // Documents folder
var dbPath = Path.Combine(documentsPath, sqliteFilename);
return new SQLite.SQLiteConnection(dbPath, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create | SQLiteOpenFlags.FullMutex, false);
}
So when I kill my app or in any random case, the app crashed. And App Center says reason for crash as:
Cache.get_Connection ()
System.InvalidOperationException: You MUST call Xamarin.Forms.Init(); prior
to using it.
Device.get_PlatformServices ()
Device.GetAssemblies ()
DependencyService.Initialize ()
DependencyService.Get[T] (Xamarin.Forms.DependencyFetchTarget fetchTarget)
Cache.get_Connection ()
TCRMobile.DataAccess.DataAccessBase..cctor () [0x00005] in
<7ccb325064fd467288e39511a2bcad63>:0
I added global::Xamarin.Forms.Forms.Init(this, bundle); in MainActivity.cs file. But still it crashes.
Any help?

Answer 1

First of all, make sure that in your MainActivity.cs (Android) / AppDelegate.cs (iOS) the Forms.Init gets called before the making of the App.
So something like this would be the correct approach
global::Xamarin.Forms.Forms.Init(this, bundle);
LoadApplication(new App());
If the above is correct, check the flow.
You should have
An interface in your portable class
public interface ISQLite
{
SQLiteConnection GetConnection();
}
An implementation for each platform (so iOS/Android/UWP) containing an assembly tag
Android example
[assembly: Xamarin.Forms.Dependency(typeof(SqLiteAndroid))]
namespace Your.Namespace.Droid
{
public class SqLiteAndroid:ISQLite
{
public SQLiteConnection GetConnection()
{
//return connection here
}
}
}
and iOS example, same principle but notice the different namespace and assembly
[assembly: Xamarin.Forms.Dependency(typeof(SqLiteiOS))]
namespace Your.Namespace.iOS
{
public class SqLiteiOS:ISQLite
{
public SQLiteConnection GetConnection()
{
//return connection here
}
}
}
A call to the DependencyService to get the connection e.g. in your App.xaml.cs
string sqlConnection= DependencyService.Get<ISQLite>().GetConnection()
Let me know if this works for you, if not, please provide some more code.