ASP.NET错误：Object reference not set to an instance of an objectServer Error in '/' Application.--------------------------------------------------------------------------------Object reference not set to an instance of an object.Description:An un

ASP.NET错误：Object reference not set to an instance of an objectServer Error in '/' Application.--------------------------------------------------------------------------------Object reference not set to an instance of an object.Description:An un
ASP.NET错误：Object reference not set to an instance of an object
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.]
HelloUser.Page_Load(Object sender,EventArgs e) in d:\Work\TpInternationalSln\TpmsSystem\HelloUser.ascx.cs:23
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp,Object o,Object t,EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender,EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Control.LoadRecursive() +141
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint,Boolean includeStagesAfterAsyncPoint) +627
--------------------------------------------------------------------------------
Version Information:Microsoft .NET Framework Version:2.0.50727.3082; ASP.NET Version:2.0.50727.3082

ASP.NET错误：Object reference not set to an instance of an objectServer Error in '/' Application.--------------------------------------------------------------------------------Object reference not set to an instance of an object.Description:An un
在那里引用对象的时候没有实例化,或者使用了null变量.只能单步跟踪了,看看问题在那里!