I work on .net core 6 web api I face issue when

send paramter pagenumber on url by post man

action not catched by break point debug .

so what is issue and How to solve It ?

i try with url

https://localhost:7235/api/items/pageNumber=1

[HttpGet("{pageNumber}")]
    public async Task<IActionResult> GetAll(int pageNumber)
    {
        
    }

it return error 200 bad Request .

but i try with url below

https://localhost:7235/api/items/
   [HttpGet]
    [Route("")]
  
    public async Task<IActionResult> GetAll(int pageNumber)
    {
        
       
    }

it working hit controller success and return data success fromitems controller action get all .

so What is issue please and How to solve it ?

Updated post not working

[HttpGet("{pageNumber}")]
public async Task<IActionResult> GetAll(int pageNumber)
{
}
for this action you need to use this url:

https://localhost:7235/api/items/1

not working and it give me error 500 internal server error

all controller items

using DomainModel.Entities;
using DomainModel.Pagination;
using DomainModel.ViewModel;
using k8s.Models;
using MediatR;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Service.Contract;
using Service.Features.CustomerFeatures.Commands;
using Service.Features.CustomerFeatures.Queries;

namespace WebApi.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class ItemsController : Controller
    {
      
        private readonly IitemService _iitem;
        private readonly IPageHelper<ItemsViewModel> _pageHelper;
        public ItemsController(IitemService iitem, IPageHelper<ItemsViewModel> pageHelper)
        {
            _iitem = iitem;
            _pageHelper = pageHelper;
        }
       
        [HttpPost]
        public async Task<IActionResult> Create(Items item)
        {
            await _iitem.AddAsync(item);
            return Ok();
           
        }

        [HttpGet("{pageNumber}")]
        public async Task<IActionResult> GetAll(int pageNumber)
        {

            var allitems = _iitem.GetAllItems();

            var result = _pageHelper.GetPage(allitems.AsQueryable(), pageNumber);

            var itemsdata = new ItemsPageViewModel
            {
                items = result.Items,
                Pager = result.Pager
            };

            return Ok(itemsdata);
        }

        [HttpGet("{id}")]
        public async Task<IActionResult> GetById(int id)
        {
           
            var details = await _iitem.GetByIdAsync(id);

         
            return Ok(details);
        }

        [HttpDelete("{id}")]
        public async Task<IActionResult> Delete(int id)
        {
            await _iitem.DeleteAsync(id);
            return Ok();
           
        }
 
        [HttpPut("{id}")]
        public async Task<IActionResult> Update(int id, Items item)
        {
            if (id != item.Id)
            {
                return BadRequest();
            }
            await _iitem.UpdateAsync(id, item);
            return Ok();
            
        }
    }
}

CodePudding user response：

The error you are actually getting is

AmbiguousMatchException: The request matched multiple endpoints.

This is because you have two actions that have the same route:

// for this action you need to use this url:
// https://localhost:7235/api/items/1

[HttpGet("{pageNumber}")]
public async Task<IActionResult> GetAll(int pageNumber)
{
    var allitems = _iitem.GetAllItems();

    var result = _pageHelper.GetPage(allitems.AsQueryable(), pageNumber);

    var itemsdata = new ItemsPageViewModel
    {
        items = result.Items,
        Pager = result.Pager
    };

    return Ok(itemsdata);
}

// for this action you ALSO need to use this url:
// https://localhost:7235/api/items/1

[HttpGet("{id}")]
public async Task<IActionResult> GetById(int id)
{       
    var details = await _iitem.GetByIdAsync(id);
         
    return Ok(details);
}

Both actions are HttpGet and both use the same route:

https://localhost:7235/api/items/x

you need to change the route for one of them.

Routing to controller actions in ASP.NET Core