91 lines
3.6 KiB
C#
91 lines
3.6 KiB
C#
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using System;
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using System.IO;
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using System.Text;
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namespace YiDa_WinForm
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{
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/// <summary>
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/// 日志辅助类（确保线程安全，正常写入文件，路径清晰，新增WinForm界面显示支持）
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/// </summary>
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public static class LogHelper
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{
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// 日志根目录（基于程序运行目录，确保路径统一）
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private static readonly string _logDirectory = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log");
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// 线程锁（保证多线程写入日志不冲突）
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private static readonly object _lockObj = new object();
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/// <summary>
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/// 新增：日志事件（当有新日志生成时触发，供MainForm订阅更新界面）
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/// </summary>
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public static event Action<string> OnLogGenerated;
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/// <summary>
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/// 静态构造函数（初始化日志目录）
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/// </summary>
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static LogHelper()
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{
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try
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{
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if (!Directory.Exists(_logDirectory))
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{
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Directory.CreateDirectory(_logDirectory);
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}
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}
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catch (Exception ex)
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{
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// 兜底：输出到WinForm调试窗口（可在VS的“输出”面板查看）
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System.Diagnostics.Debug.WriteLine($"【LogHelper初始化错误】创建日志目录失败：{ex.ToString()}");
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}
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}
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/// <summary>
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/// 写入日志（追加模式，每日一个文件，UTF-8编码，新增界面日志推送）
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/// </summary>
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/// <param name="content">日志内容</param>
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public static void AppendLog(string content)
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{
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// 空内容直接返回，避免无效写入
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if (string.IsNullOrWhiteSpace(content))
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{
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return;
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}
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try
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{
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// 1. 构造当日日志文件名（基于程序运行目录，路径绝对清晰）
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string todayLogFileName = $"log_{DateTime.Now:yyyyMMdd}.txt";
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string todayLogFileFullPath = Path.Combine(_logDirectory, todayLogFileName);
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// 2. 拼接详细时间戳和日志内容，格式清晰便于排查
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string logContent = $"[{DateTime.Now:yyyy-MM-dd HH:mm:ss.fff}] {content}";
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// 3. 加锁保证线程安全（防止多线程同时写入同一文件）
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lock (_lockObj)
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{
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// 4. 以追加模式写入，自动创建文件，指定UTF-8无BOM编码
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using (StreamWriter sw = new StreamWriter(
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todayLogFileFullPath,
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append: true,
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encoding: new UTF8Encoding(false)))
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{
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sw.WriteLine(logContent);
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// 强制刷新缓冲区，确保日志立即写入文件（避免缓存积压）
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sw.Flush();
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}
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// 5. 输出到VS调试窗口（保留原有功能）
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System.Diagnostics.Debug.WriteLine(logContent);
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}
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// 6. 新增：触发日志事件，推送日志内容到WinForm界面（不放在lock内，提高性能）
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OnLogGenerated?.Invoke(logContent);
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}
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catch (Exception ex)
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{
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// 兜底：输出完整异常信息到VS调试窗口（包含堆栈跟踪，便于排查）
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System.Diagnostics.Debug.WriteLine($"【LogHelper写入错误】写入日志失败：{ex.ToString()}");
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}
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}
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}
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}
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