添加serilog日志支持和部分其他efcore代码

QRCodeService/Application/Behaviors/LoggingBehavior.cs

@@ -0,0 +1,24 @@
+using MediatR;
+using Microsoft.Extensions.Logging;
+using QRCodeService.Extensions;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace QRCodeService.Application.Behaviors
+{
+    public class LoggingBehavior<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse>
+    {
+        private readonly ILogger<LoggingBehavior<TRequest, TResponse>> _logger;
+        public LoggingBehavior(ILogger<LoggingBehavior<TRequest, TResponse>> logger) => _logger = logger;
+
+        public async Task<TResponse> Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate<TResponse> next)
+        {
+            _logger.LogInformation("----- Handling command {CommandName} ({@Command})", request.GetGenericTypeName(), request);
+            var response = await next();
+            _logger.LogInformation("----- Command {CommandName} handled - response: {@Response}", request.GetGenericTypeName(), response);
+
+            return response;
+        }
+    }
+}