整理代码

ConsoleApp2/HostedServices/InputService.cs

@@ -42,14 +42,17 @@ public class InputService : IInputService
         {
             _logger.LogInformation("Working table: {tableName}", tableName);
             var source = _dataInputOptions.Value.CreateSource?.Invoke(tableName);
-            await source.DoEnqueue((record) =>
+            if (source != null)
             {
-                _context.AddInput();
-                producerQueue.Enqueue(record);
-                count++;
+                await source.DoEnqueue((record) =>
+                {
+                    _context.AddInput();
+                    producerQueue.Enqueue(record);
+                    count++;
 
-            });
-            if (_context.GetExceptions().Count > 0)
+                });
+            }
+            if (!_context.GetExceptions().IsEmpty)
             {
                 _logger.LogInformation("***** Csv input service is canceled *****");
                 return;