高级问题诞生了，请大哥们指教啊
Server   Error   in   '/ '   Application.
--------------------------------------------

Object   reference   not   set   to   an   instance   of   an   object.  
Description:   An   unhandled   exception   occurred   during   the   execution   of   the   current   web   request.   Please   review   the   stack   trace   for   more   information   about   the   error   and   where   it   originated   in   the   code.  

Exception   Details:   System.NullReferenceException:   Object   reference   not   set   to   an   instance   of   an   object.

Source   Error:  

An   unhandled   exception   was   generated   during   the   execution   of   the   current   web   request.   Information   regarding   the   origin   and   location   of   the   exception   can   be   identified   using   the   exception   stack   trace   below.    

Stack   Trace:  


[NullReferenceException:   Object   reference   not   set   to   an   instance   of   an   object.]
      store.Page_Load(Object   sender,   EventArgs   e)   +639
      System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr   fp,   Object   o,   Object   t,   EventArgs   e)   +15
      System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object   sender,   EventArgs   e)   +34
      System.Web.UI.Control.OnLoad(EventArgs   e)   +99
      System.Web.UI.Control.LoadRecursive()   +47
      System.Web.UI.Page.ProcessRequestMain(Boolean   includeStagesBeforeAsyncPoint,   Boolean   includeStagesAfterAsyncPoint)   +1061

 
本地无问题，上传后出错`

------解决方案--------------------
首先，确认是哪个页面报错
然后，再去查找和这个页面想关联的对象，也就是引用的对象，看看是不是有什么地方的配置和本地有差异，总之这种错误就要一步一步查
------解决方案--------------------
将web.config里的
<customErrors mode= "RemoteOnly " /> 改成
<customErrors mode= "Off " />
看是什么错误
------解决方案--------------------
配置问题

这问题经常碰到

具体问题具体操作要~！