Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Error on postback after adding ViewState

Posted on 2008-10-16
5
Medium Priority
?
4,443 Views
Last Modified: 2013-12-17
After adding the line ViewState["CachedControls"] = data to my property, I now receive this error on a postback:

"A Runtime Error has occurred.
Do you wish to Debug?
Line: 4723
Error: Sys.WebForms.PageRequestManagerServerErrorException: Error serializing value 'System.Collections.Generic.List`1[System.Collections.IEnumerable]' of type 'System.Collections.Generic.List`1[[System.Collections.IEnumerable, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].'"

I have Script Manager and UpdatePanel controls on the page, and it breaks into generated JavaScript code within an onReadyStateChange event.  The call stack is extremely unhelpful in this matter.
private List<IEnumerable> ControlData
{
	get 
	{
		List<IEnumerable> data =(List<IEnumerable>)ViewState["CachedControls"];
		if (data == null)
		{
			EditController editControl = new EditController(SearchType); 
			data = editControl.GetData();
			ViewState["CachedControls"] = data;
		}
 
		return data; 
	}
}

Open in new window

0
Comment
Question by:PerlChaser
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 3

Expert Comment

by:JunkMan
ID: 22736016
what exactly is .getData() returning, one of the IEnumerable's returned is not marked a Serializable

like so:
[Serializable]
public class foo:IEnumerable{
 
}

Open in new window

0
 
LVL 1

Author Comment

by:PerlChaser
ID: 22736136
I will get back to you on this tomorrow, I need to head home.

PerlChaser
0
 
LVL 1

Author Comment

by:PerlChaser
ID: 22739964
GetData returns an IEnumerable list containing:
1. Dictionary<string, string>
2. IEnumerable<Term>
Term is marked Serializable.
0
 
LVL 3

Accepted Solution

by:
JunkMan earned 500 total points
ID: 22741563
I vaguely remember having issues when serializing dictonaries. Could you trim the getData method to return either one or the other type? that way you will know exactly which one is causing you the problem.

Also double check if Term is not referring to any object that might not be serializable.
0
 
LVL 1

Author Comment

by:PerlChaser
ID: 22742657
Yes, serializing this object was the problem.  I chose to store just the Dictionary in the ViewState since that was the only piece I needed between calls.  Thank you very much for your help, JunkMan.
0

Featured Post

How to Use the Help Bell

Need to boost the visibility of your question for solutions? Use the Experts Exchange Help Bell to confirm priority levels and contact subject-matter experts for question attention.  Check out this how-to article for more information.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…
In response to a need for security and privacy, and to continue fostering an environment members can turn to for support, solutions, and education, Experts Exchange has created anonymous question capabilities. This new feature is available to our Pr…

688 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question