ToPage

A tiny paging library for .NET.

This library contains extension methods for IEnumerable<T> and IOrderedQueryable<T> types that make it easy to fetch a page of data from them.

Installation

Package	Target	Description
ToPage	.NET Standard 2.0	The base library
ToPage.EFCore	.NET Core 3.1	Provides async overloads using EF Core's ToListAsync and CountAsync methods
ToPage.EF6	.NET Framework 4.7.2	Provides async overloads using EF6's ToListAsync and CountAsync methods

Examples

Example projects

• Basic
• Entity Framework

Basic IEnumerable example

var numbers = Enumerable.Range(1, 10);
var page = numbers.ToPage(pageNumber: 1, itemsPerPage: 3);

Console.WriteLine(string.Join(", ", page));
// Output:
// 1, 2, 3

In this example, an IPage<int> object is returned from ToPage. Its only properties are the requested PageNumber (1), and the Items on the page.

Basic IEnumerable example with counts

var numbers = Enumerable.Range(1, 10);
var page = numbers.ToPageWithCounts(pageNumber: 1, itemsPerPage: 3);

Console.WriteLine($"Total items: {page.ItemCount}, total pages: {page.PageCount}");
Console.WriteLine(string.Join(", ", page));
// Output:
// Total items: 10, total pages: 4
// 1, 2, 3

In this example, an IPageWithCounts<int> object is returned from ToPage. It has the same properties as an IPage<int>, as well as an ItemCount and a PageCount which are calculated based on the size of the collection and the number of items per page requested.

Entity Framework async example

// Get the 5th page of 20 users ordered alphabetically by Name
var page = await context.Users
    .OrderBy(user => user.Name)
    .ToPageAsync(pageNumber: 5, itemsPerPage: 20);

Note: This example uses either the ToPage.EFCore or ToPage.EF6 library (both APIs are the same, choose the one for the EF version you're using).