/// <summary>
/// Fetches the requested page from the IItemsProvider.
/// </summary>
/// <param name="pageIndex">Index of the page.</param>
/// <returns></returns>
protected IList <T> FetchPage(int pageIndex, int pageLength, out int count)
{
var result = ItemsProvider.FetchRange(pageIndex * PageSize, pageLength, out count);
Debug.Assert(result.Count <= pageLength, string.Format("Requested {0} got {1}", pageLength, result.Count));
Debug.Assert(count >= result.Count, "Sanity check");
return(result);
}
/// <summary>
/// Fetches the requested page from the IItemsProvider.
/// </summary>
/// <param name="pageIndex">Index of the page.</param>
/// <returns></returns>
protected IList <T> FetchPage(int pageIndex)
{
if (pageIndex * PageSize + PageSize <= _count)
{
return(ItemsProvider.FetchRange(pageIndex * PageSize, PageSize));
}
return(ItemsProvider.FetchRange(pageIndex * PageSize, (_count - pageIndex * PageSize)));
}
/// <summary>
/// Fetches the requested page from the IItemsProvider.
/// </summary>
/// <param name="pageIndex">Index of the page.</param>
/// <returns></returns>
protected IList <T> FetchPage(int pageIndex)
{
return(ItemsProvider.FetchRange(pageIndex * PageSize, PageSize));
}
/// <summary>
/// Fetches the requested page from the IItemsProvider.
/// </summary>
/// <param name="pageIndex">Index of the page.</param>
/// <returns></returns>
protected async Task <IList <T> > FetchPage(int pageIndex)
{
return(await ItemsProvider.FetchRange(pageIndex *PageSize, PageSize));
}
protected IList <T> FetchRange(int startIndex, int count)
{
return(ItemsProvider.FetchRange(startIndex, count));
}
/// <summary>
/// Fetches the requested page from the IItemsProvider.
/// </summary>
/// <param name="pageIndex">Index of the page.</param>
/// <returns></returns>
protected IList <T> FetchPage(int pageIndex)
{
//Trace.WriteLine("ВОЗВРАТ СТРАНИЦЫ: pageIndex=" + pageIndex);
return(ItemsProvider.FetchRange(pageIndex * PageSize, PageSize));
}
/// <summary>
/// Not supported.
/// </summary>
/// <param name="array">The one-dimensional <see cref="T:System.Array"/> that is the destination of the elements copied from <see cref="T:System.Collections.Generic.ICollection`1"/>. The <see cref="T:System.Array"/> must have zero-based indexing.</param>
/// <param name="arrayIndex">The zero-based index in <paramref name="array"/> at which copying begins.</param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="array"/> is null.
/// </exception>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// <paramref name="arrayIndex"/> is less than 0.
/// </exception>
/// <exception cref="T:System.ArgumentException">
/// <paramref name="array"/> is multidimensional.
/// -or-
/// <paramref name="arrayIndex"/> is equal to or greater than the length of <paramref name="array"/>.
/// -or-
/// The number of elements in the source <see cref="T:System.Collections.Generic.ICollection`1"/> is greater than the available space from <paramref name="arrayIndex"/> to the end of the destination <paramref name="array"/>.
/// -or-
/// Type <paramref name="T"/> cannot be cast automatically to the type of the destination <paramref name="array"/>.
/// </exception>
public void CopyTo(T[] array, int arrayIndex)
{
ItemsProvider.FetchRange(arrayIndex, array.Length).CopyTo(array, arrayIndex);
}
/// <summary>
/// Not supported.
/// </summary>
/// <param name="array">The one-dimensional <see cref="T:System.Array"/> that is the destination of the elements copied from <see cref="T:System.Collections.Generic.ICollection`1"/>. The <see cref="T:System.Array"/> must have zero-based indexing.</param>
/// <param name="arrayIndex">The zero-based index in <paramref name="array"/> at which copying begins.</param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="array"/> is null.
/// </exception>
/// <exception cref="T:System.ArgumentOutOfRangeException">
/// <paramref name="arrayIndex"/> is less than 0.
/// </exception>
/// <exception cref="T:System.ArgumentException">
/// <paramref name="array"/> is multidimensional.
/// -or-
/// <paramref name="arrayIndex"/> is equal to or greater than the length of <paramref name="array"/>.
/// -or-
/// The number of elements in the source <see cref="T:System.Collections.Generic.ICollection`1"/> is greater than the available space from <paramref name="arrayIndex"/> to the end of the destination <paramref name="array"/>.
/// -or-
/// Type <see cref="T"/> cannot be cast automatically to the type of the destination <paramref name="array"/>.
/// </exception>
public void CopyTo(T[] array, int arrayIndex)
{
ItemsProvider.FetchRange(0, Count).CopyTo(array);
}
/// <summary>
/// Fetches the requested page from the IItemsProvider.
/// </summary>
/// <param name="pageIndex">Index of the page.</param>
/// <returns></returns>
protected IList <T> FetchPage(int pageIndex, int pageLength, out int count)
{
return(ItemsProvider.FetchRange(pageIndex * PageSize, pageLength, out count));
}
