ASP.NET Core WebApi：AmbiguousMatchException：请求匹配多个端点

Question

我在标准 .NET Core WebApi 项目中有这个控制器代码：

[ApiController]
[Route("[controller]")]
public class MessageController : ControllerBase
{
  [HttpGet]
  public string GetByTransactionId([FromRoute(Name = "transactionId")] string transactionId)
  {
    return "transactionId";
  }

  [HttpGet]
  public string GetByNumber([FromRoute(Name = "number")] string number)
  {
    return "number";
  }
}

我想像这样访问 api：

• https://localhost:44316/Message?transactionId=abc
• https://localhost:44316/Message?number=foobar

当访问端点 URL 时，例如：https://localhost:44316/Message?transactionId=abc，我收到如下错误：

AmbiguousMatchException: The request matched multiple endpoints. Matches:

Server.Controllers.MessageController.GetByTransactionId (Server)
Server.Controllers.MessageController.GetByNumber (Server)

这可以通过使用正确的[HttpGet] 或[Route] 属性来解决吗？

Answer 1

    [ApiController]
    [Route("[Message]")]
    public class MessageController : ControllerBase
    {
      [HttpGet]
      [Route("transactionId")]
      public string GetByTransactionId([FromRoute(Name = "transactionId")] string transactionId)
      {
        return "transactionId";
      }
    
      [HttpGet]
      [Route("number")]
      public string GetByNumber([FromRoute(Name = "number")] string number)
      {
        return "number";
      }
    }

尝试使用 Route-attribute 。这将解决您的问题