我正在开发一个 .NET 8 Web API 项目,并包含了以下 NuGet 包:
<PackageReference Include="Gridify" Version="2.14.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.8" />
<PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="8.0.8" />
在对 Gridify 进行概念验证(POC)时,我参考了一篇文章:https://medium.com/codenx/asp-net-core-web-api-with-gridify-d27627c81169,但遇到了以下错误:
无法将类型“Gridify.Paging<GridifyAdvancedDemo.Product>”隐式转换为“System.Linq.IQueryable<GridifyAdvancedDemo.Product>”。存在显式转换(您是否缺少强制转换?)
代码如下:
程序.cs
using GridifyAdvancedDemo;
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddSingleton<IProductRepository, ProductRepository>();
builder.Services.AddScoped<IProductService, ProductService>();
builder.Services.AddControllers();
var app = builder.Build();
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.Run();
产品.cs
namespace GridifyAdvancedDemo;
public class Product
{
public int Id { get; set; }
public string Name { get; set; }
public decimal Price { get; set; }
public string Category { get; set; }
}
产品存储库.cs
namespace GridifyAdvancedDemo;
public interface IProductRepository
{
IQueryable<Product> GetProducts();
}
public class ProductRepository : IProductRepository
{
private readonly List<Product> _products;
public ProductRepository()
{
// Sample data
_products = new List<Product>
{
new Product { Id = 1, Name = "Product A", Price = 10.99m, Category = "Category1" },
new Product { Id = 2, Name = "Product B", Price = 20.99m, Category = "Category2" },
// Add more products
};
}
public IQueryable<Product> GetProducts()
{
return _products.AsQueryable();
}
}
产品服务.cs
using Gridify;
namespace GridifyAdvancedDemo;
public interface IProductService
{
IQueryable<Product> GetFilteredProducts(GridifyQuery gridifyQuery);
}
public class ProductService : IProductService
{
private readonly IProductRepository _productRepository;
public ProductService(IProductRepository productRepository)
{
_productRepository = productRepository;
}
public IQueryable<Product> GetFilteredProducts(GridifyQuery gridifyQuery)
{
var products = _productRepository.GetProducts().Gridify(gridifyQuery);
return products;
}
}
产品控制器.cs
using Gridify;
using Microsoft.AspNetCore.Mvc;
namespace GridifyAdvancedDemo.Controllers;
[ApiController]
[Route("api/[controller]")]
public class ProductsController : ControllerBase
{
private readonly IProductService _productService;
public ProductsController(IProductService productService)
{
_productService = productService;
}
[HttpGet]
public IActionResult GetProducts([FromQuery] GridifyQuery gridifyQuery)
{
var products = _productService.GetFilteredProducts(gridifyQuery);
return Ok(products);
}
}
有人能帮我提供一些代码示例作为我实现的参考吗?
Gridify() 方法不返回
IQueryable<Product>
,而是返回Paging<Product>
。因此,您应该调整方法签名以获取分页结果。或者,针对每个特定操作(例如筛选、排序或分页)使用适当的方法。或者如果您需要所有三个操作+ IQuaryable 结果,您可以使用
ApplyFilteringOrderingPaging
方法我的建议是: