/// <summary>
/// Initializes a new instance of the <see cref="PersistenceServices" /> class.
/// </summary>
/// <param name="context">The context.</param>
/// <exception cref="System.ArgumentNullException">Thrown when a null reference is passed to the method.</exception>
public PersistenceServices(PartnerDbContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
_context = context;
}
/// <summary>
/// Gets a collection of items, in a page of data, and materializes the result-set to a read-only collection.
/// </summary>
/// <typeparam name="T">The type of the query.</typeparam>
/// <param name="context">The context.</param>
/// <param name="query">The query.</param>
/// <param name="pageIndex">Index of the page.</param>
/// <param name="pageSize">The size of the page of results to return. <paramref name="offset" /> is non-zero-based.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// A collection of the <see cref="T" /> objects.
/// </returns>
public static async Task <ListResult <T> > FindItemsAsync <T>(this PartnerDbContext context, IQueryable <T> query, int pageIndex, int pageSize, CancellationToken cancellationToken)
{
int count = await query.CountAsync(cancellationToken);
if (count == 0)
{
return(ListResult <T> .Empty);
}
return(ListResult.Create(await query.Paging(pageIndex, pageSize).ToListAsync(cancellationToken), count));
}
/// <summary>
/// Gets a collection of items, in a page of data, and materializes the result-set to a read-only collection.
/// </summary>
/// <typeparam name="T">The type of the query.</typeparam>
/// <param name="context">The context.</param>
/// <param name="query">The query.</param>
/// <param name="offset">The index of the page of results to return. Use 1 to indicate the first page.</param>
/// <param name="pageSize">The size of the page of results to return. <paramref name="offset" /> is non-zero-based.</param>
/// <param name="totalItemCount">The total number of matched objects.</param>
/// <returns>
/// A collection of the <see cref="T" /> objects.
/// </returns>
public static IList <T> FindItems <T>(this PartnerDbContext context, IQueryable <T> query, int pageIndex, int pageSize, out int totalItemCount)
{
totalItemCount = query.Count();
if (totalItemCount > 0)
{
return(query.Paging(pageIndex, pageSize).ToList());
}
return(new List <T>());
}
/// <summary>
/// Gets a collection of items and materializes the result-set to a read-only collection.
/// </summary>
/// <typeparam name="T">The type of the query.</typeparam>
/// <param name="context">The context.</param>
/// <param name="query">The query.</param>
/// <returns>
/// A collection of the <see cref="T" /> objects.
/// </returns>
public static async Task <IList <T> > FindItemsAsync <T>(this PartnerDbContext context, IQueryable <T> query, CancellationToken cancellationToken)
{
return(await query.ToListAsync(cancellationToken));
}