/// <summary>
/// Converts the specified source to <see cref="IPagedListModel{T}"/> by the specified <paramref name="pageNumber"/> and <paramref name="pageSize"/>.
/// </summary>
/// <typeparam name="T">The type of the source.</typeparam>
/// <param name="source">The source to paging.</param>
/// <param name="pageNumber">The number of the page, index from 1.</param>
/// <param name="pageSize">The size of the page.</param>
/// <param name="cancellationToken">
/// A <see cref="CancellationToken" /> to observe while waiting for the task to complete.
/// </param>
/// <returns>An instance of implements <see cref="IPagedListModel{T}"/> interface.</returns>
public static async Task <IPagedListModel <T> > ToPagedListAsync <T>(this IQueryable <T> source, int pageNumber, int pageSize, CancellationToken cancellationToken = default)
{
if (pageNumber <= 0)
{
pageNumber = 1;
}
if (pageSize <= 0)
{
pageSize = 10;
}
var count = await source.CountAsync(cancellationToken).ConfigureAwait(false);
if (count == 0)
{
return(new PagedListModel <T>()
{
PageNumber = pageNumber, PageSize = pageSize, TotalCount = 0
});
}
if (pageNumber > 1)
{
source = source.Skip((pageNumber - 1) * pageSize);
}
var items = await source
.Take(pageSize)
.ToArrayAsync(cancellationToken);
var pagedList = new PagedListModel <T>()
{
PageNumber = pageNumber,
PageSize = pageSize,
TotalCount = count,
Data = items
};
return(pagedList);
}
/// <summary>
/// Converts the specified source to <see cref="IPagedListModel{T}"/> by the specified <paramref name="pageNumber"/> and <paramref name="pageSize"/>.
/// </summary>
/// <typeparam name="T">The type of the source.</typeparam>
/// <param name="source">The source to paging.</param>
/// <param name="pageNumber">The number of the page, index from 1.</param>
/// <param name="pageSize">The size of the page.</param>
/// <returns>An instance of implements <see cref="IPagedListModel{T}"/> interface.</returns>
public static IPagedListModel <T> ToPagedList <T>(this IQueryable <T> source, int pageNumber, int pageSize)
{
if (pageNumber <= 0)
{
pageNumber = 1;
}
if (pageSize <= 0)
{
pageSize = 10;
}
var count = source.Count();
if (count == 0)
{
return(new PagedListModel <T>()
{
PageNumber = pageNumber, PageSize = pageSize, TotalCount = 0
});
}
if (pageNumber > 1)
{
source = source.Skip((pageNumber - 1) * pageSize);
}
var items = source
.Take(pageSize)
.ToArray();
var pagedList = new PagedListModel <T>()
{
PageNumber = pageNumber,
PageSize = pageSize,
TotalCount = count,
Data = items
};
return(pagedList);
}
