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

SGGL/BLL/PZHGL/InformationProject/WorkHandoverApproveService.cs

@@ -9,7 +9,7 @@ namespace BLL
 {
     public class WorkHandoverApproveService
     {
-        public static Model.SGGLDB db = Funs.DB;
+        
 
         /// <summary>
         /// 获取分页列表
@@ -17,6 +17,7 @@ namespace BLL
         /// <returns></returns>
         public static IEnumerable getListData(string WorkHandoverId)
         {
+            Model.SGGLDB db = Funs.DB;
             return from x in db.ZHGL_WorkHandoverApprove
                    where x.WorkHandoverId == WorkHandoverId && x.ApproveDate != null
                    orderby x.ApproveDate
@@ -98,6 +99,7 @@ namespace BLL
         /// <returns>一个工作交接审批实体</returns>
         public static Model.ZHGL_WorkHandoverApprove GetWorkHandoverApproveByWorkHandoverId(string constructionPlanId)
         {
+            Model.SGGLDB db = Funs.DB;
             return db.ZHGL_WorkHandoverApprove.FirstOrDefault(x => x.WorkHandoverId == constructionPlanId && x.ApproveDate == null);
         }
         /// <summary>
@@ -120,6 +122,7 @@ namespace BLL
 
         public static Model.ZHGL_WorkHandoverApprove GetComplie(string WorkHandoverId)
         {
+            Model.SGGLDB db = Funs.DB;
             return db.ZHGL_WorkHandoverApprove.FirstOrDefault(x => x.WorkHandoverId == WorkHandoverId && x.ApproveType == BLL.Const.WorkHandover_Compile);
         }
         public static Model.ZHGL_WorkHandoverApprove GetWorkHandoverApproveById(string WorkHandoverApproveId)