重寫信眾編號程式

web/App_Code/GlobalVariables.cs

@@ -8,5 +8,5 @@ using System.Web;
 /// </summary>
 public static class GlobalVariables
 {
-    public static readonly object FNumberLock = new object();
+    // FNumberLock 已移除，因為改用資料庫直接取號，不再需要 Application 狀態鎖定
 }

web/App_Code/Model/Partial/follower.cs

@@ -190,20 +190,86 @@ namespace Model
         public static string generate_f_number(string sex = "男眾")
         {
             string selectedSex = sex;
-            string f_number = selectedSex == "男眾" ? "M" : "F";
             var datePart = DateTime.Now.ToString("yyyyMMdd");
-            f_number += datePart;
             
-
-            int nextSerial = 1;
-            
-            lock (GlobalVariables.FNumberLock)
+            // 使用重試機制確保不重號
+            int maxRetries = 5;
+            for (int retry = 0; retry < maxRetries; retry++)
             {
-                nextSerial = (int)HttpContext.Current.Application["FNumberSerial"] + 1;
-                HttpContext.Current.Application["FNumberSerial"] = nextSerial;
+                try
+                {
+                    using (var _db = new Model.ezEntities())
+                    using (var transaction = _db.Database.BeginTransaction())
+                    {
+                        // 在交易中查詢最大序號
+                        int nextSerial = GetNextSerialFromDatabase(_db, datePart, selectedSex);
+                        string f_number = GenerateFNumber(selectedSex, datePart, nextSerial);
+                        
+                        // 立即檢查是否重複（在交易中）
+                        if (!_db.followers.Any(f => f.f_number == f_number))
+                        {
+                            transaction.Commit();
+                            return f_number;
+                        }
+                        
+                        // 如果重複，回滾交易並重試
+                        transaction.Rollback();
+                        
+                        // 短暫延遲後重試
+                        if (retry < maxRetries - 1)
+                        {
+                            System.Threading.Thread.Sleep(10 + retry * 5); // 10ms, 15ms, 20ms, 25ms
+                        }
+                    }
+                }
+                catch (Exception ex)
+                {
+                    System.Diagnostics.Debug.WriteLine($"生成編號失敗 (重試 {retry + 1}): {ex.Message}");
+                    if (retry == maxRetries - 1)
+                    {
+                        // 最後一次重試失敗，使用時間戳記確保唯一性
+                        return GenerateFNumberWithTimestamp(selectedSex, datePart);
+                    }
+                }
             }
-            f_number += nextSerial.ToString("D5");
-            return f_number;
+            
+            // 如果所有重試都失敗，使用時間戳記
+            return GenerateFNumberWithTimestamp(selectedSex, datePart);
+        }
+
+        private static int GetNextSerialFromDatabase(Model.ezEntities _db, string datePart, string sex)
+        {
+            var prefix = sex == "男眾" ? "M" : "F";
+            var searchPattern = prefix + datePart;
+            
+            var maxFNumber = _db.followers
+                .Where(m => 
+                    m.f_number.Length == 14 &&
+                    m.f_number.StartsWith(searchPattern))
+                .OrderByDescending(m => m.f_number)
+                .Select(m => m.f_number)
+                .FirstOrDefault();
+
+            if (!string.IsNullOrEmpty(maxFNumber))
+            {
+                var serialPart = maxFNumber.Substring(9, 5);
+                return int.Parse(serialPart) + 1;
+            }
+            return 1;
+        }
+
+        private static string GenerateFNumber(string sex, string datePart, int serial)
+        {
+            string prefix = sex == "男眾" ? "M" : "F";
+            return prefix + datePart + serial.ToString("D5");
+        }
+
+        private static string GenerateFNumberWithTimestamp(string sex, string datePart)
+        {
+            // 使用時間戳記確保唯一性（最後手段）
+            string prefix = sex == "男眾" ? "M" : "F";
+            var timestamp = DateTime.Now.ToString("HHmmss");
+            return prefix + datePart + timestamp;
         }
     }
 

web/Global.asax

@@ -27,8 +27,6 @@
         //GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear();
         //註冊自訂路由
         RouteConfig.RegisterRoutes(RouteTable.Routes);
-        InitializeFNumberSerial();//啟動項目的時候查詢出信眾編號的最大值放在記憶體中
-
         //bundle js、css
         //BundleConfig.RegisterBundles(BundleTable.Bundles);
 
@@ -63,38 +61,4 @@
         System.Web.HttpContext.Current.SetSessionStateBehavior(System.Web.SessionState.SessionStateBehavior.Required);
     }
 
-    private void InitializeFNumberSerial()
-    {
-        try
-        {
-            using (var _db = new Model.ezEntities())
-            {
-                var maxFNumber = _db.followers
-                    .Where(m => 
-                    ////m.IsDel == false && ////不確定是否新增欄位? 先註解
-                    m.f_number.Length == 14 &&
-                    (m.f_number.StartsWith("M") || m.f_number.StartsWith("F")))
-                .OrderByDescending(m => m.reg_time)
-                .Select(m => m.f_number)
-                .FirstOrDefault();
-
-                int nextSerial = 0;
-                if (!string.IsNullOrEmpty(maxFNumber))
-                {
-                    try
-                    {
-                        var serialPart = maxFNumber.Substring(9, 5);
-                        nextSerial = int.Parse(serialPart);
-                    }
-                    catch { }
-                }
-
-                Application["FNumberSerial"] = nextSerial;
-            }
-        }
-        catch (Exception ex)
-        {
-            Application["FNumberSerial"] = 0;
-        }
-    }
 </script>

web/admin/follower/reg.aspx.cs

@@ -207,25 +207,8 @@ public partial class admin_follower_reg : MyWeb.config
                             }
                         }
                     }
+                    // 使用新的 generate_f_number 方法，已內建重號檢查和重試機制
                     followers.f_number = follower.generate_f_number(sex.SelectedValue);
-                    if (chk_pro_num(followers.f_number))
-                    {
-
-                    }
-                    else
-                    {
-                        followers.f_number = follower.generate_f_number(sex.SelectedValue);
-                        if (chk_pro_num(followers.f_number))
-                        {
-
-                        }
-                        else
-                        {
-                            L_msg.Type = alert_type.danger;
-                            L_msg.Text = "信眾編號重複";
-                            return;
-                        }
-                    }
                     followers.identity_type = Val(identity_type.SelectedValue);
                     if(!isStrNull(leader.Value)) followers.leader = Val(leader.Value);
                     if (!isStrNull(country.Value)) followers.country = country.Value;