hi dears,
I used the cach system on the content.aspx page like below:
<%@ OutputCache Duration="300" VaryByParam="id;mediaId" %>
When the new page requested by client, I got the "NullReferenceException: "Object reference not set to an instance of an object" as the same problem that explain in this page -> http://support.microsoft.com/kb/831382
the microsoft page explain a problem in asp.net 1.1 . but my page compile under visual studio 2008 and asp.net 3.5 .
note: i use a url rewrite api on my site to: mydomain.com/news/123 -> mydomain.com/content.aspx?id=123
Please share me your experience about this problem
Edited: The Page error is
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.] AyandeNews.Main.Page_Load(Object sender, EventArgs e) +629 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 AyandeNews.PSBaseMasterPage.OnLoad(EventArgs e) +37 System.Web.UI.Control.LoadRecursive() +50 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