Storing custom collection in ViewState

[igitur]

Hi all,

I have a custom collection derived from
System.Collections.Specialized.NameObjectCollectionBase.

NameObjectCollectionBase already implements ISerializable, so it
should be easy to store in the ViewState, right?

I'm, however, unable to do so. I can add the collection object
successfully, but with the page reload, it tells me the ViewState is
corrupted.

It's the infamous "The viewstate is invalid for this page and might be
corrupted" message.

I've confirmed with a viewstate decoder that the viewstate is indeed
corrupt, but I have no idea why.

Please have a look at

http://www.sun.ac.za/sms/CustomCollectionInViewState.zip

It's a replication of my problem.

I'm running VS.NET 2003.

thnx!
Francois Botha

 

[John Saunders]

Hi all,

I have a custom collection derived from
System.Collections.Specialized.NameObjectCollectionBase.

NameObjectCollectionBase already implements ISerializable, so it
should be easy to store in the ViewState, right?

I'm, however, unable to do so. I can add the collection object
successfully, but with the page reload, it tells me the ViewState is
corrupted.

It's the infamous "The viewstate is invalid for this page and might be
corrupted" message.

I've confirmed with a viewstate decoder that the viewstate is indeed
corrupt, but I have no idea why.

Please have a look at

http://www.sun.ac.za/sms/CustomCollectionInViewState.zip

It's a replication of my problem.

I'm running VS.NET 2003.

You may want to look at
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspnet/html/asp11222001.asp.
It mentions the idea of writing your own TypeConverter as opposed to using
serialization for ViewState.