按照客户要求将excel导出文件保存为一个条码一条记录，名称为SN_结果_时间.xslx

SLZ_4/FileLogger.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SLZ_4
+{
+    public enum LogLevel
+    {
+        DEBUG,
+        INFO,
+        WARNING,
+        ERROR
+    }
+    class FileLogger
+    {
+        private static readonly string LogPath = Path.Combine(
+            AppDomain.CurrentDomain.BaseDirectory,
+            "logs",
+            $"{DateTime.Now:yyyyMMdd}.log");
+
+        public static void Log(string message, LogLevel level = LogLevel.INFO)
+        {
+            Directory.CreateDirectory(Path.GetDirectoryName(LogPath));
+            File.AppendAllText(LogPath,
+                $"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] [{level}] {message}{Environment.NewLine}");
+        }
+    }
+}