如何在ASP.NET MVC 6中注册ILogger以进行注入 [英] How to register ILogger for injection in ASP.NET MVC 6
问题描述
我有一个ASP.NET MVC 6(beta-4)应用程序.
I have a ASP.NET MVC 6 (beta-4) app.
public void ConfigureServices(IServiceCollection services)
{
// Logging
services.AddLogging();
// ...
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerfactory)
{
// Add the console logger.
loggerfactory.AddConsole(minLevel: LogLevel.Warning);
// ...
}
我有一个控制器...
And I have a controller...
public class HomeController :
Controller
{
ILogger _logger;
public HomeController(ILogger logger)
{
_logger = logger;
}
// ...
}
但是当我以某种方式未正确注册服务时:InvalidOperationException: Unable to resolve service for type 'Microsoft.Framework.Logging.ILogger' while attempting to activate 'HomeController'.
.注册记录器我在做什么错?
But when I'm not getting the service registered correctly somehow: InvalidOperationException: Unable to resolve service for type 'Microsoft.Framework.Logging.ILogger' while attempting to activate 'HomeController'.
. What am I doing wrong with the registering the logger?
推荐答案
我认为services.AddLogging();
做正确的事情并注册ILogger
.在查看源代码之后( https://github.com/aspnet/Logging/blob/d874c5726e713d3eb34938f85faf7be61aae0f2a/src/Microsoft.Framework.Logging/LoggingServiceCollectionExtensions.cs ),我发现它实际上是在注册ILogger<>
.将ILogger
的签名更改为ILogger<HomeController>
可使上面的示例起作用.
I assumed that services.AddLogging();
was doing the right thing and registering ILogger
. After looking at the source (https://github.com/aspnet/Logging/blob/d874c5726e713d3eb34938f85faf7be61aae0f2a/src/Microsoft.Framework.Logging/LoggingServiceCollectionExtensions.cs) I found that it's actually registering ILogger<>
. Changing the signature of ILogger
to ILogger<HomeController>
makes the above example work.
public class HomeController :
Controller
{
ILogger<HomeController> _logger;
public HomeController(ILogger<HomeController> logger)
{
_logger = logger;
}
// ...
}
感谢@Steve,让我走上正确的道路找到了这个.
Thanks to @Steve for setting me on the right track to find this.
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