出现此问题的原因可能是由于OData在单个实体URI上处理可能不正确或缺少某些配置。以下是一种可能的解决方法,包括代码示例:
using Microsoft.AspNet.OData.Extensions;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;
然后,找到ConfigureServices方法并添加以下配置:
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers().AddNewtonsoftJson();
services.AddOData();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
// ...
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
endpoints.Select().Filter().OrderBy().Count().MaxTop(10);
endpoints.MapODataRoute("odata", "odata", GetEdmModel());
});
// ...
}
private static IEdmModel GetEdmModel()
{
var builder = new ODataConventionModelBuilder();
builder.EntitySet("Entities");
return builder.GetEdmModel();
}
[Route("odata/[controller]")]
[ApiController]
public class EntitiesController : ControllerBase
{
private readonly MyDataContext _context;
public EntitiesController(MyDataContext context)
{
_context = context;
}
[HttpGet]
[EnableQuery]
public IActionResult Get()
{
return Ok(_context.Entities);
}
[HttpGet("{id}")]
public IActionResult Get(int id)
{
var entity = _context.Entities.FirstOrDefault(e => e.Id == id);
if (entity == null)
{
return NotFound();
}
return Ok(entity);
}
// Other actions...
}
请注意,此示例中的“Entities”是您的实体名称,您可以根据自己的项目进行替换。
通过这些步骤,您应该能够在ASP.Net Core Web API中正确实现与OData的单个实体URI。