asp.net-mvc - 为什么我的属性路由不起作用？

Question

这是我的 Controller 的样子:

[Route("api/[controller]")]
[Produces("application/json")]
public class ClientsController : Controller
{
    private readonly IDataService _clients;

    public ClientsController(IDataService dataService)
    {
        _clients = dataService;
    }

    [HttpPost]
    public int Post([Bind("GivenName,FamilyName,GenderId,DateOfBirth,Id")] Client model)
    {
        // NB Implement.
        return 0;
    }

    [HttpGet("api/Client/Get")]
    [Produces(typeof(IEnumerable<Client>))]
    public async Task<IActionResult> Get()
    {
        var clients = await _clients.ReadAsync();
        return Ok(clients);
    }

    [HttpGet("api/Client/Get/{id:int}")]
    [Produces(typeof(Client))]
    public async Task<IActionResult> Get(int id)
    {
        var client = await _clients.ReadAsync(id);
        if (client == null)
        {
            return NotFound();
        }

        return Ok(client);
    }

    [HttpGet("api/Client/Put")]
    public void Put(int id, [FromBody]string value)
    {
    }

    [HttpGet("api/Client/Delete/{id:int}")]
    public void Delete(int id)
    {
    }
}

然而，当我请求 URL /api/Clients/Get 时， 如下:

json = await Client.GetStringAsync("api/Clients/Get");

我得到以下异常:

AmbiguousActionException: Multiple actions matched. The following actions matched route data and had all constraints satisfied:

Assessment.Web.Controllers.ClientsController.Index (Assessment.Web) Assessment.Web.Controllers.ClientsController.Details (Assessment.Web) Assessment.Web.Controllers.ClientsController.Create (Assessment.Web)

Client是 HttpClient .请注意，没有与路由数据匹配的 GET 操作，尽管名称相同， id .

这里可能有什么问题？

Answer 1

您使用的属性错误。

您在 Controller 上有一条路线

[Route("api/[controller]")]

这将映射到 api/Clients并将其作为 Controller 中任何操作路由的前缀。

所以这意味着

[HttpGet("api/Client/Get")] // Matches GET api/Clients/api/Client/Get
[Produces(typeof(IEnumerable<Client>))]
public async Task<IActionResult> Get()
{
    var clients = await _clients.ReadAsync();
    return Ok(clients);
}

将 GET 匹配到 api/Clients/api/Client/Get因为 Controller 上的路由前缀。

引用 Routing to Controller Actions

您需要相应地更新操作的属性路由

[Route("api/[controller]")]
[Produces("application/json")]
public class ClientsController : Controller {
    private readonly IDataService _clients;

    public ClientsController(IDataService dataService)
    {
        _clients = dataService;
    }

    [HttpPost] //Matches POST api/Clients
    public int Post([Bind("GivenName,FamilyName,GenderId,DateOfBirth,Id")] Client model) {
        // NB Implement.
        return 0;
    }

    [HttpGet("Get")] //Matches GET api/Clients/Get
    [Produces(typeof(IEnumerable<Client>))]
    public async Task<IActionResult> Get() {
        //...code removed for brevity
    }

    [HttpGet("Get/{id:int}")] //Matches GET api/Clients/Get/5
    [Produces(typeof(Client))]
    public async Task<IActionResult> Get(int id) {
        //...code removed for brevity
    }

    [HttpGet("Put")] //Matches PUT api/Clients/Put
    public void Put(int id, [FromBody]string value) {
        //...code removed for brevity
    }

    [HttpGet("Delete/{id:int}")] //Matches GET api/Clients/Delete/5
    public void Delete(int id) {
    }
}

删除操作实际上应该重构为 HTTP DELETE 并且应该返回 IActionResult

[HttpDelete("Delete/{id:int}")] //Matches DELETE api/Clients/Delete/5
public IActionResult Delete(int id) {
    //...code removed for brevity
}