In Local Server the file is not showing any error but on web server it is showing this error

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This error is coming when i have uploaded the website on server

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:

Line 43: Label1.Text = "View All Blogs";
Line 44:
Line 45: ent.GetEntryList(Repeater1);
Line 46: }
Line 47:

Source File: e:\HostingSpaces\ims4maths\blog.ims4maths.com\wwwroot\Default.aspx.cs Line: 45

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
IMS.DAL.Functions..cctor() in D:\Saba\Final IMS Blog\IMS.DAL\Functions.cs:20

[TypeInitializationException: The type initializer for 'IMS.DAL.Functions' threw an exception.]
IMS.DAL.Functions.ExecuteSelectCommand(String CommandName) in D:\Saba\Final IMS Blog\IMS.DAL\Functions.cs:55
IMS.DAL.EntriesDb.GetEntryList() in D:\Saba\Final IMS Blog\IMS.DAL\EntriesDb.cs:38
IMS.BLL.EntriesAction.GetEntryList(Repeater rep) in D:\Saba\Final IMS Blog\IMS.BLL\EntriesAction.cs:39
Default.ShowAllBlogs() in e:\HostingSpaces\ims4maths\blog.ims4maths.com\wwwroot\Default.aspx.cs:45
Default.Page_Load(Object sender, EventArgs e) in e:\HostingSpaces\ims4maths\blog.ims4maths.com\wwwroot\Default.aspx.cs:37
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
System.Web.UI.Control.OnLoad(EventArgs e) +92
System.Web.UI.Control.LoadRecursive() +54
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +772

Posted 25-Jul-14 23:15pm

sabaaqeel

Updated 25-Jul-14 23:26pm

v2

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 26-Jul-14 6:49am

I guess the Repeater is null.

1 solution

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_Amy · Answer 1 · 2014-07-26T01:34:00

From http://www.dotnetperls.com/nullreferenceexception[^]:
The program defines the Main entry point. The string reference variable is assigned to the null literal. Next, the Length property is accessed on the string reference. The program compiles correctly, but will always throw an execution.

Note:
You cannot access an instance property like Length on a null reference. An exception will always occur.

You need to debug your program and check for all possible null values.

[Update]
Check ent and Repeater1 object for null values before using it.

--Amy