ASP.NET核心3.1 Web API post方法导致405“不允许的方法”错误

app.UseRouting();

app.UseEndpoints(endpoints =>
{
    endpoints.MapControllers();
});

[ApiController]
[Route("api/[controller]")]
public class MyController : ControllerBase
{
    [HttpPost]
    public IActionResult PostMethod()
    {
        // 处理POST请求的逻辑
        return Ok();
    }
}

[HttpPost]
public IActionResult PostMethod()
{
    // 处理POST请求的逻辑
    return Ok();
}

<configuration>
  <system.webServer>
    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified"/>
    </handlers>
  </system.webServer>
</configuration>

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseRouting();

    app.UseAuthorization();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
    });
}

[ApiController]
[Route("api/[controller]")]
public class MyController : ControllerBase
{
    [HttpPost]
    public IActionResult PostMethod([FromBody] MyModel model)
    {
        if (ModelState.IsValid)
        {
            // 处理POST请求的逻辑
            return Ok(new { message = "Data received successfully." });
        }
        else
        {
            return BadRequest(ModelState);
        }
    }
}

public class MyModel
{
    public string Name { get; set; }
    public int Age { get; set; }
}