Getting error : System.NullReferenceException: Object reference not set to an instance of an object

Question

0.00/5 (No votes)

See more:

Getting error : System.NullReferenceException: Object reference not set to an instance of an object in Local Report using report viewer and RDLC

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
Microsoft.Reporting.WebForms.ReportViewer.get_ReportControlSession() +37
Microsoft.Reporting.WebForms.ReportViewerClientScript.SetViewerInfo(ReportViewer viewer, String reportAreaId, String promptAreaRowId, String docMapAreaId, String fixedTableId, String promptSplitterId, String docMapSplitterId, String docMapHeaderOverflowId, String directionCacheId, String browserModeCacheId) +1594
Microsoft.Reporting.WebForms.ReportViewer.OnPreRender(EventArgs e) +3335
System.Web.UI.Control.PreRenderRecursiveInternal() +80
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Control.PreRenderRecursiveInternal() +171
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

Posted 3-Oct-13 0:28am

Me_Friendly

Add a Solution

Comments

♥…ЯҠ…♥ 3-Oct-13 6:45am

Have you ever heard about the word debugging in Visual Studio?

Thanks7872 3-Oct-13 7:15am

Where is the code? Don't you understand that we can not assume your code?

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2013-10-03T00:56:00

Solution 1

We can't help you - you need access to your code while it is running in order to work out which variable is causing the problem.
So run your code in the debugger, and when the exception occurs look at the variables in your code to see which is null...

Posted 3-Oct-13 0:56am

OriginalGriff

Simon_Whale · Answer 2 · 2013-10-03T05:00:00

AS you haven't posted any snippets of code all I can suggest is that you have a read of this.

Normally this error is when you have not instantiated an object correctly.

http://social.msdn.microsoft.com/Forums/en-US/a14e8eb9-927f-4083-837d-8d4c6676515e/i-want-any-example-for-reportviewer[^]