The security validation for this page is invalid

Question

I am trying to declare items in doc library inside a specific folder as records. This is my code:
using (SPWeb site = SPContext.Current.Site.OpenWeb("myClassicSite")) {               
                    site.AllowUnsafeUpdates = true;
                    SPList list = site.Lists.TryGetList(currentDocLibName);
                    SPFolder folder = list.GetItemById(foldId).Folder;
                    try {
                            SPDocumentLibrary doclib = (SPDocumentLibrary)site.Lists.TryGetList(currentDocLibName);
                            SPView defaultView = doclib.Views["my custom view"];
                            SPListItemCollection docColl = doclib.GetItemsInFolder(defaultView, folder);
                            foreach (SPListItem item in docColl) {                              
                                Records.DeclareItemAsRecord(item); // throws exception here
                    } catch (Exception) {
It throws exception: "The security validation for this page is invalid"
I just can't declare items as records, I tried RunwWithElevetedPriviledges, AllowUnsafeUpdate, and SPWebapplication.FormDigestSettings.Enabled = false;
What am I doing wrong?

Answer 1

Have you tried adding SPUtility.ValidateFormDigest(); before the start of your code section? Have a look at the article below for more info on the same.
http://blogs.technet.com/b/meamcs/archive/2011/04/04/troubleshooting-sharepoint-error-the-security-validation-for-this-page-is-invalid.aspx
The problem should be originating because of the use of AllowUnsafeUpdates in your code above. Here is a good writeup on best practices when using AllowUnsafeUpdates in the code:
https://hristopavlov.wordpress.com/tag/formdigestsettings/
Thanks, Ransher Singh, MCP, MCTS | Click Vote As Helpful if you think that post is helpful in responding your question click Mark As Answer, if you think that this is your answer for your question.