feat(hjgl): 完善焊接任务与质量管理流程

SGGL/BLL/Common/Funs.cs

@@ -947,7 +947,36 @@ namespace BLL
             return month;
         }
 
+        /// <summary>
+        /// 根据当前最大编号生成带三位流水号的新编号。
+        /// </summary>
+        /// <param name="maxNumber">当前已分配的最大编号</param>
+        /// <param name="prefix">编号前缀</param>
+        /// <returns>新编号</returns>
+        public static string GetThreeNumber(string maxNumber, string prefix)
+        {
+            if (string.IsNullOrEmpty(prefix))
+            {
+                throw new ArgumentException("编号前缀不能为空", "prefix");
+            }
+            if (string.IsNullOrEmpty(maxNumber))
+            {
+                return prefix + "001";
+            }
 
+            int serial;
+            if (maxNumber.Length < 3
+                || !int.TryParse(maxNumber.Substring(maxNumber.Length - 3), out serial))
+            {
+                throw new InvalidOperationException("当前最大编号的后三位不是有效流水号：" + maxNumber);
+            }
+            if (serial >= 999)
+            {
+                throw new InvalidOperationException("三位流水号已用完");
+            }
+
+            return prefix + (serial + 1).ToString("D3");
+        }
         public static DateTime GetQuarterlyMonths(string year, string quarterly)
         {
             string startMonth = string.Empty;