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PO(Homework) MVC Pagination Help
 

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  1. PO(Homework) MVC Pagination Help
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    <p>I'm attempting to put together a very simple application using ASP.NET MVC that shows news articles and paginates them. I'm sort of half-way there but need some help sorting out the pagination and getting it to work with the search query.</p> <p>Here is my HomeController:</p> <pre><code>public ActionResult Index(String query, int? page) { // limit the number of articles per page const int pageSize = 4; // build the query var ArticleQuery = from a in _db.ArticleSet select a; // check if their is a query if (!string.IsNullOrEmpty(query)) { ArticleQuery = ArticleQuery.Where(a =&gt; a.headline.Contains(query)); } // orders the articles var OrderedArticles = ArticleQuery.OrderByDescending(a =&gt; a.posted); // takes the ordered articles and paginates them //var paginatedArticles = new PaginatedList(OrderedArticles.Skip((page ?? 0) * pageSize).Take(pageSize), page ?? 0, pageSize); var paginatedArticles = new PaginatedList&lt;Article&gt;(OrderedArticles, page ?? 0, pageSize); // return the paginated articles to the view return View(paginatedArticles); } </code></pre> <p>The idea is that the Controller shows 4 items per page will order them by date. Here is the View I have for the Index method:</p> <pre><code>&lt;ul id="pagination"&gt; &lt;% if (Model.PreviousPage) { %&gt; &lt;li&gt;&lt;%= Html.ActionLink("&lt;&lt; First Page", "Index")%&gt;&lt;/li&gt; &lt;li&gt;&lt;%= Html.ActionLink("&lt;&lt; Previous Page", "Index", new { page=(Model.PageIndex-1) }) %&gt;&lt;/li&gt; &lt;% } %&gt; &lt;% if (Model.NextPage) { %&gt; &lt;li&gt;&lt;%= Html.ActionLink("Next Page &gt;&gt;", "Index", new { page = (Model.PageIndex + 1) })%&gt;&lt;/li&gt; &lt;li&gt;&lt;%= Html.ActionLink("Last Page &gt;&gt;", "Index", new { page = (Model.TotalPages - 1) })%&gt;&lt;/li&gt; &lt;% } %&gt; &lt;/ul&gt; </code></pre> <p>The idea is that these two pagination links will only show if the conditions are true.</p> <p>Finally here is the PaginatedList class for the pager:</p> <pre><code> using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using System.Web.Routing; namespace NewsApp.Models { public class PaginatedList&lt;T&gt; : List&lt;T&gt; { public int PageIndex { get; private set; } public int PageSize { get; private set; } public int TotalCount { get; private set; } public int TotalPages { get; private set; } public PaginatedList(IQueryable&lt;T&gt; source, int pageIndex, int pageSize) { PageIndex = pageIndex; PageSize = pageSize; TotalCount = source.Count(); TotalPages = (int)Math.Ceiling(TotalCount / (double)PageSize); this.AddRange(source.Skip(PageIndex * PageSize).Take(PageSize)); } public bool HasPreviousPage { get { return (PageIndex &gt; 0); } } public bool HasNextPage { get { return (PageIndex + 1 &lt; TotalPages); } } } </code></pre> <p><strong>NOTE: I' don't want to use any 3rd party components like MVCContrib etc as this is for a University assignment so would defeat the purpose.</strong></p> <p>The pagination works fine now but when I do a search and have e.g. /?query=test I want to be able to page the results, at the moment they get lost :/</p> <p>Thanks.</p>
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    1. COjust answered something similar: http://stackoverflow.com/questions/4659978/asp-net-mvc-pagination-using-take-and-skip/4662573#4662573
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    2. COany updates thank you.
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    3. COGoogled CHT2520 because I was suspicious. Only results look like school class schedules. Looks like somebody has homework due tomorrow?
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