在Azure App Service的门户上 Log Stream 日志无输出，需要如何操作让其输出Application Logs呢?
如下图所示：
请注意，上图中提示说：Application logs are switched off. You can turn them on using the App Service Logs Settings. 应用日志关闭，可以通过App Service Logs 页面来设置开启。
App Service ---> App Service Logs : 针对Application Logging 和 Web Server Logging 为On，最后点击页面上的Save按钮。
保存后，返回Log Stream页面，就可以实时查看App Service中的输出日志：
using Microsoft.AspNetCore.Mvc; namespace myapi01.Controllers { [ApiController] [Route("[controller]")] public class AASController : ControllerBase { private readonly ILogger<AASController> _logger; public AASController(ILogger<AASController> logger) { _logger = logger; } [HttpGet] [Route("/log")] public string GetLog() { _logger.LogInformation("this is test massge informaiton level!!!!!!!"); _logger.LogWarning("this is test massge Warning level!!!!!!!"); _logger.LogError("this is test massge Error level!!!!!!!"); _logger.LogDebug("this is test massge debug level!!!!!!!"); _logger.LogCritical("this is test massge Critical level!!!!!!!"); _logger.LogTrace("this is test massge Trace level!!!!!!!"); return "Outpu logs - today 2023-04-18 03:56"; } [HttpGet] [Route("/exp")] public string Getexception() { throw new Exception("thsi is my custome exception today."); } } }