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

SGGL/BLL/HSSE/EduTrain/TestPlanService.cs

@@ -8,7 +8,7 @@ namespace BLL
     /// </summary>
     public static class TestPlanService
     {
-        public static Model.SGGLDB db = Funs.DB;
+        
 
         /// <summary>
         /// 根据主键获取培训计划
@@ -26,6 +26,7 @@ namespace BLL
         /// <param name="testPlan"></param>
         public static void AddTestPlan(Model.Training_TestPlan testPlan)
         {
+            Model.SGGLDB db = Funs.DB;
             Model.Training_TestPlan newTestPlan = new Model.Training_TestPlan
             {
                 TestPlanId = testPlan.TestPlanId,
@@ -63,6 +64,7 @@ namespace BLL
         /// <param name="TestPlan"></param>
         public static void UpdateTestPlan(Model.Training_TestPlan TestPlan)
         {
+            Model.SGGLDB db = Funs.DB;
             Model.Training_TestPlan newTestPlan = db.Training_TestPlan.FirstOrDefault(e => e.TestPlanId == TestPlan.TestPlanId);
             if (newTestPlan != null)
             {
@@ -138,6 +140,7 @@ namespace BLL
         /// <returns></returns>
         public static List<Model.Training_TestPlan> GetTestPlanList()
         {
+            Model.SGGLDB db = Funs.DB;
             return (from x in db.Training_TestPlan orderby x.PlanCode select x).ToList();
         }