From 60d788178fd86b7b19c87de35c398c91189c4e8a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=9Chsc=E2=80=9D?= <“huangsucan@kaiyili-lab.com”>
Date: Thu, 10 Sep 2026 14:35:26 +0800
Subject: [PATCH] =?UTF-8?q?P3:=20=E6=95=B0=E6=8D=AE=E5=BA=93=E6=96=87?=
 =?UTF-8?q?=E4=BB=B6=E8=86=A8=E8=83=80=20=E2=86=92=20=E5=90=AF=E5=8A=A8?=
 =?UTF-8?q?=E6=97=B6=E6=A3=80=E6=9F=A5=E6=96=87=E4=BB=B6=E8=BF=87=E6=9C=9F?=
 =?UTF-8?q?=EF=BC=88=E9=BB=98=E8=AE=A4180=E5=A4=A9=EF=BC=89=EF=BC=8C?=
 =?UTF-8?q?=E8=BF=87=E6=9C=9F=E5=88=99=E5=BD=92=E6=A1=A3=E9=87=8D=E5=91=BD?=
 =?UTF-8?q?=E5=90=8D=EF=BC=88SQL=5F=E5=BD=92=E6=A1=A3=5FyyyyMMdd=5FHHmmss.?=
 =?UTF-8?q?db=EF=BC=89=EF=BC=8C=E4=B8=8D=E5=88=A0=E9=99=A4=E8=AE=B0?=
 =?UTF-8?q?=E5=BD=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ACP/App.xaml.cs       |  2 ++
 ORM/DatabaseConfig.cs | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/ACP/App.xaml.cs b/ACP/App.xaml.cs
index 24fceaf..876517c 100644
--- a/ACP/App.xaml.cs
+++ b/ACP/App.xaml.cs
@@ -121,6 +121,8 @@ namespace ACP
             //初始化数据库
             DatabaseConfig.SetTenant(10001);
             DatabaseConfig.InitSqlite();
+            // 启动时检查数据库文件是否过期，过期则归档（重命名加时间戳），后续会自动创建新库
+            DatabaseConfig.TryArchiveOldDatabase();
             DatabaseConfig.CreateDatabaseAndCheckConnection(createDatabase: true, checkConnection: true);
             SqlSugarContext.InitDatabase();
             //显示登录窗口
diff --git a/ORM/DatabaseConfig.cs b/ORM/DatabaseConfig.cs
index 0fa07cc..07f4b66 100644
--- a/ORM/DatabaseConfig.cs
+++ b/ORM/DatabaseConfig.cs
@@ -128,5 +128,44 @@ namespace ORM
                 throw new Exception("连接数据库失败");
             }
         }
+
+        /// <summary>
+        /// 归档过期数据库文件：将旧的 SQLite 文件重命名为 "SQL_归档_yyyyMMdd_HHmmss.db"，
+        /// 后续 <see cref="CreateDatabaseAndCheckConnection"/> 会自动创建新的空数据库。
+        /// <para>
+        /// 必须在 <see cref="InitSqlite"/> 之后、<see cref="CreateDatabaseAndCheckConnection"/> 之前调用，
+        /// 此时连接字符串已就绪但数据库文件尚未被打开。
+        /// </para>
+        /// </summary>
+        /// <param name="retentionDays">数据库文件保留天数，默认 180 天（半年）</param>
+        public static void TryArchiveOldDatabase(int retentionDays = 180)
+        {
+            try
+            {
+                // 从连接字符串中提取文件路径（格式：Data Source=xxx;）
+                string dbPath = DbConnectionString
+                    .Replace("Data Source=", "", StringComparison.OrdinalIgnoreCase)
+                    .TrimEnd(';');
+
+                if (!File.Exists(dbPath)) return;
+
+                var cutoff = DateTime.Now.AddDays(-retentionDays);
+                var fileInfo = new FileInfo(dbPath);
+
+                if (fileInfo.LastWriteTime < cutoff)
+                {
+                    string archiveName = $"SQL_归档_{fileInfo.LastWriteTime:yyyyMMdd_HHmmss}.db";
+                    string archivePath = Path.Combine(fileInfo.DirectoryName!, archiveName);
+
+                    File.Move(dbPath, archivePath);
+                    System.Diagnostics.Debug.WriteLine(
+                        $"[数据库归档] {dbPath} → {archivePath}（文件最后修改于 {fileInfo.LastWriteTime:yyyy-MM-dd}，已超过 {retentionDays} 天）");
+                }
+            }
+            catch (Exception ex)
+            {
+                System.Diagnostics.Debug.WriteLine($"数据库归档失败（不影响软件正常使用）：{ex.Message}");
+            }
+        }
     }
 }