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4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error serializing for view state up vote 2 down vote favorite I am having problems serialising data for the view state. I am using VS2010 and when trying to add a property to the view state error serializing value c# I get the following error message: Error serializing value 'System.Collections.Generic.List`1[Access.ARW.Business.Filters.Parameters.Parameter]' of type 'System.Collections.Generic.List`1[[Access.ARW.Business.Filters.Parameters.Parameter, Access.ARW.Business, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].' I have added a [Serializable] attribute above the classes I am trying to serialise but I still get this error...any ideas Here is the property declaration which is in Class A: private List ReportParameters { get { if (ViewState["ReportParameters"] == null) { ViewState["ReportParameters"] = new List(); } return (List) ViewState["ReportParameters"]; } set { ViewState["ReportParameters"] = value; } } c# asp.net serialization share|improve this question edited Sep 6 '12 at 13:43 Owen Blacker 2,5091957 asked Feb 2 '12 at 16:59 user559142 3,7582986153 2 Does your class contain further objects? If so everything in your object hierarchy must be marked [Serializable] –Peter Monks Feb 2 '12 at 17:02 please post the code sample.. it would help out as well as others to understand what your code is doing –MethodMan Feb 2 '12 at 17:03 @pjmonks - yes there are sever

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Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to fix ViewState serialization error with my custom control? up vote 3 down vote favorite I'm writing http://stackoverflow.com/questions/9116481/error-serializing-for-view-state my first asp.net user control. It displays a list of locations that the user can select from. I can load a list of locations into the control, and I can see what location the user selected when the page posts back, but the list itself is lost when the page posts back. I populate the list with an object of type IEnumerable where DetailedLocation is a class with several string fields. When http://stackoverflow.com/questions/4949614/how-to-fix-viewstate-serialization-error-with-my-custom-control I try to put the list into ViewState, I get the following error: Type 'System.Linq.OrderedEnumerable`2 [[DetailedLocation, AT.Common, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]' in Assembly 'System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable. Certainly, my type can be marked serializable, but this error message persists. I know that it must be possible to make this work somehow. After all, I can pass an object of this type to a GridView and the data will persist thru postback. How do I fix this? asp.net linq serialization viewstate share|improve this question edited Feb 9 '11 at 19:48 asked Feb 9 '11 at 19:39 Daniel Allen Langdon 11.7k33117229 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted If you've already marked your type as serializable, try saving the collection as List instead of IEnumerable. I'm guessing under the IEnumerable interface is some sort of LINQ concrete collection type that's not serializable. share|improve this answer answered Feb 9 '11 at 19:51 Adam Rackis 57k32172285 What a simple answer and it works! :-D –Daniel Allen Langdon Feb 9 '11 at 20:53 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password

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