I have started recently some Sharepoint development and I was quickly trapped by a common exception that all beginners have been confonted(I presume…) : “operation is not valid due to the current state of the object”. After searching and trying when this error occurs, I have find an answer… but according many source, this exception can depends on many things.
Mine is when you want to update some file attributes within a SPSecurity.RunWithElevatedPrivileges delegate.
Here my code that fails:
SPFile f = null;
SPSecurity.RunWithElevatedPrivileges(delegate()
{
using (SPWeb web = GetWebFromUrl(siteUrl, false))
{
f=web.GetFolder(folderUrl).Files[descriptor.Name];
FillFile(descriptor, f);
f.Item.Update();
}
});
The error occurs when we reach the code f.Item.Update(). All objects are not null and loaded successfully.
So, to avoid that, the code must be written like that:
SPFile f = null;
SPSecurity.RunWithElevatedPrivileges(delegate()
{
using (SPWeb web = GetWebFromUrl(siteUrl, false))
{
f=web.GetFolder(folderUrl).Files[descriptor.Name];
}
});
FillFile(descriptor, f);
f.Item.Update();
A simple change.
I have not found more information about the issue but the problem can be solved like that.
