I'm trying to create a spweb in page_load via a control on the site. I get the error "The security validation for this page is invalid".
I've got a postback (No GET-Request) and also tried SPUtility.ValidateFormDigest in the onInit-Method and directly before RunWithElevatedPrivileagues.
I've placed a FormDigest Control on the ascx of my control. The masterpage is Seattle.master and contains the formdigestplceholder and control.
It works on the dev-system with farm-account but not on the integrationsystem. I'm on SP2013.
Any suggestions?
[Update 2] Ok the code in Update 1 wasn't the real problem. The real problem occured in the following line:
Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "CreateMeetingRepost", "document.forms[0].submit();", true);
In the Page_Load I'm registering this code to submit the site to itself for getting a postback. But after the postback occures and control is fully loaded the page is getting a security validation error somewhere else (not in my code). Any suggestions?
All I want to do is create a subsite. I tried AllowUnsafeUpdate on Rootweb and Site but that didn't work. SharePoint throws an innerexception while copying contenttype to the new web.
[Update1 - Not the Problem] Some Code - MeetingManager.CreateMeetingAndFillUrl creates the subsite
SPSecurity.RunWithElevatedPrivileges(() =>
{
using (SPSite elevatedSite = new SPSite(SPContext.Current.Site.ID))
{
using (SPLongOperation operation = new SPLongOperation(this.Page))
{
operation.LeadingHTML = "Meeting wird erstellt";
operation.Begin();
MeetingManager.CreateMeetingAndFillUrl(elevatedSite, currentMeeting);
try
{
operation.End(currentMeeting.Url);
}
catch (ThreadAbortException)
{
// This exception is thrown because the SPLongOperation.End
// calls a Response.End internally
// see: http://dotnetfollower.com/wordpress/2011/08/sharepoint-how-to-use-splongoperation/
}
}
}
});