初步可用后台

Core/JXCMS.Core/TimingTask/QuartzTask.cs

@@ -52,6 +52,42 @@ namespace JXCMS.Core.TimingTask
         {
             return await _scheduler.DeleteJobs(jobKeys);
         }
-        
+
+
+        /// <summary>
+        /// Corn表达式的运行时间
+        /// </summary>
+        /// <param name="cron">表达式</param>
+        /// <param name="times">计算次数</param>
+        /// <param name="startTime">开始时间</param>
+        /// <returns></returns>
+        public static string GetCronSchedule(String cron, int times, DateTimeOffset startTime)
+        {
+            String timeSchedule = "";
+            if (!CronExpression.IsValidExpression(cron))
+            {
+                return "Cron表达式不合法!";
+            }
+            try
+            {
+                ITrigger trigger1 = TriggerBuilder.Create()
+
+                    .WithCronSchedule(cron)
+                    .StartNow()
+                    .Build();
+                for (int i = 0; i < times; i++)
+                {
+                    DateTimeOffset? s = trigger1.GetFireTimeAfter(startTime);
+                    DateTime? time = s?.LocalDateTime;
+                    timeSchedule = time?.ToString("F");
+                }
+            }
+            catch (System.Exception e)
+            {
+                timeSchedule = "未知时间";
+            }
+
+            return timeSchedule;
+        }
     }
 }