全局处理问题：public static Model.SGGLDB db = Funs.DB;

SGGL/BLL/HSSE/Manager/ManagerMonthC/HseCostCService.cs

@@ -8,7 +8,7 @@ namespace BLL
 {
     public class HseCostCService
     {
-        public static Model.SGGLDB db = Funs.DB;
+        
 
         /// <summary>
         /// 获取分页列表
@@ -16,6 +16,7 @@ namespace BLL
         /// <returns></returns>
         public static IEnumerable getListData(string monthReportId)
         {
+            Model.SGGLDB db = Funs.DB;
             return from x in db.Manager_HseCostC
                    where x.MonthReportId == monthReportId
                    orderby x.UnitId
@@ -77,6 +78,7 @@ namespace BLL
         /// <param name="monthReportId">月报告主键</param>
         public static void DeleteHseCostsByMonthReportId(string monthReportId)
         {
+            Model.SGGLDB db = Funs.DB;
             var q = (from x in db.Manager_HseCostC where x.MonthReportId == monthReportId select x).ToList();
             if (q.Count>0)
             {