每月最后一天统计上月有效wifi,要先删除

AppStart/WifiCheckHelper.cs

@@ -53,6 +53,12 @@ public class WifiCheckHelper
         WebCMSEntities db = new WebCMSEntities();
         MySystem.JavaProductModels.WebCMSEntities javadb = new MySystem.JavaProductModels.WebCMSEntities();
         int i = 0;
+        var items = javadb.KxsMachineThali;
+        foreach(var item in items)
+        {
+            javadb.KxsMachineThali.Remove(item);
+        }
+        javadb.SaveChanges();
         List<WifiTradeRecord> trades = db.WifiTradeRecord.Where(m => m.Duration > m.DoMonths).ToList();
         foreach(WifiTradeRecord trade in trades)
         {