/// <summary>Loads data for given page.</summary>
/// <param name="start">Start item index.</param>
/// <param name="size">Page size.</param>
/// <returns></returns>
public async Task <IEnumerable <T> > LoadPageAsync(int start, int size)
{
// Create base query
ITableQueryAsync <T> baseQuery = _db.Table <T>();
if (_queryFunc != null)
{
baseQuery = _queryFunc(baseQuery);
}
ITableQueryAsync <T> fetchQuery = baseQuery.Skip(start).Take(size);
return(await fetchQuery.ToListAsync().ConfigureAwait(false));
}
/// <summary>
/// Update page item according to current page.
/// </summary>
/// <returns></returns>
public override async Task UpdateCurrentPageItemsAsync()
{
// Create base query
ITableQueryAsync <T> baseQuery = _db.Table <T>();
if (_queryFunc != null)
{
baseQuery = _queryFunc(baseQuery);
}
// Count items
_itemCount = await baseQuery.CountAsync().ConfigureAwait(false);
// Fetch and add items
int skip = (CurrentPage - 1) * PageSize;
ITableQueryAsync <T> fetchQuery = baseQuery.Skip(skip).Take(PageSize);
IEnumerable <T> newItems = await fetchQuery.ToListAsync().ConfigureAwait(false);
using (CurrentPageItems.SuspendChangeNotifications())
((ICollection <T>)CurrentPageItems).ReplaceRange(newItems);
}