Co-authored-by: Copilot <copilot@github.com>
4.5 KiB
Pagination
A row of numbered page links — Previous, 1, 2, 3…, Next. Use it at the bottom of a list or table when there are too many items to show all at once. You give it the current page number, the total number of pages, and a URL pattern; it builds all the links automatically.
Quick example
new Pagination(current: 3, total: 10, urlPattern: "/blog?page={0}")
This renders a navigation row with links to pages 1–10 (with ellipsis for interior pages) and the Previous/Next arrows.
All the options
public Pagination(
int current,
int total,
string urlPattern)
| Parameter | What it does |
|---|---|
current |
The currently active page. 1-based (the first page is 1). |
total |
The total number of pages. |
urlPattern |
A URL with {0} where the page number goes. E.g. "/items?page={0}". |
The visible page window is at most 7 buttons. For large page counts, interior pages collapse into ellipsis (…) while the first page, last page, and pages close to current stay visible.
Real-world examples
Basic list with pagination
<!-- Templates/BlogPage.htmx -->
<div class="space-y-6 mb-10">$$Posts$$</div>
$$Pager$$
// Templates/BlogPage.htmx.cs
_pager = new Pagination(
current: page,
total: totalPages,
urlPattern: "/blog?page={0}");
Preserving filters and sort order across pages
Build the URL pattern to include any query parameters that should survive page navigation:
var urlPattern = $"/users?role={role}&sort={sort}&page={{0}}";
new Pagination(current: page, total: totalPages, urlPattern: urlPattern)
Note the double braces
{{0}}to produce a literal{0}after string interpolation.
HTMX-powered pagination (no full page reload)
Wrap the pagination (and the content it controls) in a hx-boost container:
<div hx-boost="true" hx-target="#item-list" hx-push-url="true">
<div id="item-list">$$Items$$</div>
$$Pager$$
</div>
How it works
All links are plain <a href="..."> elements — no JavaScript required. The URL for each page is built by calling string.Format(urlPattern, pageNumber). When current == 1, the Previous link is styled as disabled (pointer-events removed, opacity reduced); same for Next when current == total.
Complete page example
Templates/BlogPage.htmx
<div class="max-w-3xl mx-auto py-10">
<h1 class="text-2xl font-bold mb-6">Blog</h1>
<div class="space-y-6 mb-10">
$$PostList$$
</div>
$$Pagination$$
</div>
Templates/BlogPage.htmx.cs
namespace Htmx.ApiDemo.Templates;
public sealed class BlogPage : BlogPageBase
{
private readonly byte[] _postList;
private readonly IHtmxComponent _pagination;
public BlogPage(IEnumerable<BlogPost> posts, int currentPage, int totalPages)
{
var sb = new System.Text.StringBuilder();
foreach (var post in posts)
{
sb.Append($"""
<article class="border-b pb-6">
<h2 class="text-lg font-semibold mb-1">
<a href="/blog/{System.Net.WebUtility.HtmlEncode(post.Slug)}"
class="hover:underline">
{System.Net.WebUtility.HtmlEncode(post.Title)}
</a>
</h2>
<p class="text-sm text-muted-foreground mb-2">{post.PublishedAt:MMMM d, yyyy}</p>
<p class="text-sm">{System.Net.WebUtility.HtmlEncode(post.Summary)}</p>
</article>
""");
}
_postList = sb.ToString().ToUtf8Bytes();
_pagination = new Components.Pagination(
current: currentPage,
total: totalPages,
urlPattern: "/blog?page={0}");
}
protected override void RenderPostList(HtmxRenderContext ctx) => ctx.Writer.WriteUtf8(_postList);
protected override void RenderPagination(HtmxRenderContext ctx) => _pagination.Render(ctx.Next());
}
GET handler
[Handler]
[MapGet("/blog")]
public static partial class GetBlogHandler
{
public record Query([property: FromQuery] int Page = 1);
private static async Task<IResult> HandleAsync(
Query q, HttpContext ctx, BlogService blog, CancellationToken ct)
{
const int pageSize = 10;
var (posts, total) = await blog.GetPageAsync(q.Page, pageSize, ct);
int totalPages = (int)Math.Ceiling(total / (double)pageSize);
return await ctx.WriteHtmxPage(
new BlogPage(posts, q.Page, totalPages), title: "Blog");
}
}