DevForce Community Forum : InvalidOperation Exception when saving http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2010 : InvalidOperation Exception when saving Tue, 16 Jun 2026 17:54:57 -700 Tue, 04 Jan 2011 01:23:38 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=2413 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ InvalidOperation Exception when saving : No problem. Thanks for sharing... http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9544#9544 Author: DenisK
Subject: 2413
Posted: 04-Jan-2011 at 1:23am

No problem. Thanks for sharing your solution.]]> Tue, 04 Jan 2011 01:23:38 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9544#9544 InvalidOperation Exception when saving : I think I figured it out. I was... http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9541#9541 Author: mmedic
Subject: 2413
Posted: 03-Jan-2011 at 8:14pm

I think I figured it out. I was trying to delete an object graph in the collection changed event handler which did not work. Once I moved the Delete() outside the event handler code, everything worked OK. Thanks for your help!
]]> Mon, 03 Jan 2011 20:14:18 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9541#9541 InvalidOperation Exception when saving : Could you try deleting the object... http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9540#9540 Author: DenisK
Subject: 2413
Posted: 03-Jan-2011 at 6:31pm

Could you try deleting the object graph without binding the collection to the Infragistics DataGrid in the first place?]]> Mon, 03 Jan 2011 18:31:12 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9540#9540 InvalidOperation Exception when saving : I looked at this some more and... http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9536#9536 Author: mmedic
Subject: 2413
Posted: 03-Jan-2011 at 6:18pm

I looked at this some more and actually the error is happening when I call Entity.Delete() method as a part of deleting the object graph. There is noting that is modifying the collection at tha time but the collection was bound to an Infragtistics DataGrid and unbound prior to Delete() call. Any ideas?]]> Mon, 03 Jan 2011 18:18:03 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9536#9536 InvalidOperation Exception when saving : mmedic;I've tried to repro... http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9533#9533 Author: DenisK
Subject: 2413
Posted: 03-Jan-2011 at 3:34pm

mmedic;

I've tried to repro but was not able to as well. Here's what reentrant means from Wikipedia. 

http://en.wikipedia.org/wiki/Reentrant_(subroutine)

In the context of this issue, this exception can occur if you have a RelatedEntityList<T> and you are making a change to that list using either Clear(), Add(), Remove() and/or RemoveAt() methods. And while that change is still being made, another change is executed.

In your case, you have a Book with a RelatedEntityList<Isbn>. My suggestion is to check whether there's another Add, Clear, and/or Remove operation that is being executed while you're deleting the Book's object graph.

Hope this helps.
]]> Mon, 03 Jan 2011 15:34:34 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9533#9533 InvalidOperation Exception when saving : I am not sure that I&#039;ll be... http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9530#9530 Author: mmedic
Subject: 2413
Posted: 03-Jan-2011 at 11:33am

I am not sure that I'll be able to recreate it using the NorthwindIB database. I'm trying to get information on what this exception means as it may be something I'm doing wrong in my code. I could not find any documentation about the exception or concept or reentrance. The method throwing the exception is CheckReenatrance().]]> Mon, 03 Jan 2011 11:33:08 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9530#9530 InvalidOperation Exception when saving : Hi mmedic;Could you provide a... http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9529#9529 Author: DenisK
Subject: 2413
Posted: 03-Jan-2011 at 11:21am

Hi mmedic;

Could you provide a repro solution using NorthwindIB database? Thank you.
]]> Mon, 03 Jan 2011 11:21:48 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9529#9529 InvalidOperation Exception when saving : I have a Book object in my model... http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9521#9521 Author: mmedic
Subject: 2413
Posted: 02-Jan-2011 at 9:59pm

I have a Book object in my model that contains a list of Isbn objects. When I try to delete a whole graph of Book (including the Isbn object), I get a "RelatedEntityList's are not reentrant" message. I've never seen that before and could not dig up anything on the net. Any ideas why this error is occurring?
]]> Sun, 02 Jan 2011 21:59:51 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2413&PID=9521#9521