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

SGGL/BLL/HSSE/EduTrain/TrainingTaskService.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Net;
 using System.Text;
 
 namespace BLL
@@ -10,7 +11,7 @@ namespace BLL
     /// </summary>
     public static class TrainingTaskService
     {
-        public static Model.SGGLDB db = Funs.DB;
+        
 
         /// <summary>
         /// 根据主键获取培训任务
@@ -19,7 +20,7 @@ namespace BLL
         /// <returns></returns>
         public static Model.Training_Task GetTaskById(string taskId)
         {
-            return db.Training_Task.FirstOrDefault(e => e.TaskId == taskId);
+            return Funs.DB.Training_Task.FirstOrDefault(e => e.TaskId == taskId);
         }
 
         /// <summary>
@@ -38,6 +39,7 @@ namespace BLL
         /// <param name="task"></param>
         public static void AddTask(Model.Training_Task task)
         {
+            Model.SGGLDB db = Funs.DB;
             Model.Training_Task newTask = new Model.Training_Task
             {
                 TaskId = task.TaskId,