static async Task <TResult> PerformDatabaseFunction <TResult>(Func <XamListDatabaseContext, Task <TResult> > databaseFunction) where TResult : class
{
using var connection = new XamListDatabaseContext();
try
{
var result = await databaseFunction.Invoke(connection).ConfigureAwait(false);
await connection.SaveChangesAsync().ConfigureAwait(false);
return(result);
}
catch (Exception e)
{
Debug.WriteLine("");
Debug.WriteLine(e.Message);
Debug.WriteLine(e.ToString());
Debug.WriteLine("");
throw;
}
}
public static List <ContactModel> GetAllContactModels(Func <ContactModel, bool> wherePredicate)
{
using var connection = new XamListDatabaseContext();
return(connection.Contacts.Where(wherePredicate).ToList());
}