How can I implement paging with filtering in an ASP.NET Core MVC application using EF Core?
I recently switched to I'm refactoring my project and I've looked through the documentation and I'm still confused about I tried several approaches but none seem to work. I'm currently developing an ASP.NET Core MVC application (version 6.0) and I'm trying to implement paging along with filtering on a list of products fetched from a SQL Server database using Entity Framework Core (version 6.0). I have a situation where the product list should not only be paged but also be filterable based on the product's category and availability. I've set up a basic repository pattern to fetch the products, but I'm struggling to combine the filtering with paging. Here's what I've tried so far: In my `ProductsController`, I have the following action method: ```csharp public async Task<IActionResult> Index(string category, bool? isAvailable, int page = 1) { int pageSize = 10; var productsQuery = _context.Products.AsQueryable(); if (!string.IsNullOrEmpty(category)) { productsQuery = productsQuery.Where(p => p.Category == category); } if (isAvailable.HasValue) { productsQuery = productsQuery.Where(p => p.IsAvailable == isAvailable.Value); } var totalItems = await productsQuery.CountAsync(); var products = await productsQuery.Skip((page - 1) * pageSize).Take(pageSize).ToListAsync(); var model = new ProductsViewModel { Products = products, PagingInfo = new PagingInfo { CurrentPage = page, ItemsPerPage = pageSize, TotalItems = totalItems } }; return View(model); } ``` However, when I load the view, I see the correct number of products based on the filters, but the pagination links do not seem to reflect the filtered total. For instance, if I filter by a specific category and there are only 3 products available, the pagination still shows links for 10 pages instead of just 1. I've also added a view that renders the pagination links: ```html @model ProductsViewModel <div class="pagination"> @for (int i = 1; i <= Model.PagingInfo.TotalPages; i++) { <a asp-action="Index" asp-route-category="@ViewBag.CurrentCategory" asp-route-isAvailable="@ViewBag.CurrentIsAvailable" asp-route-page="i">@i</a> } </div> ``` I thought using `TotalItems` directly from the query would account for the filters, but it seems like I'm missing something in terms of maintaining the filter states for my pagination links. What do I need to do to ensure that the pagination reflects the actual number of pages based on the filtered results? Any insights would be greatly appreciated. For context: I'm using Csharp on Windows. I'm working on a web app that needs to handle this. I recently upgraded to Csharp LTS. For reference, this is a production web app. I'd be grateful for any help.