Solution to Problem: “FileNotFoundException” With My Feature Receiver.

I was working on a feature last week that would add some event receivers to a specific list instance.  (I blogged a bit about that list receiver here).

Using the command line, I could install the feature with no error (but see below for the hidden error).  When I tried to deploy the feature on the site, MOSS complained of a "FileNotFoundException" error.  This blog entry describes how I solved it. 

This is the error that MOSS showed me in the web browser:

Feature ‘b2cb42e3-4f0a-4380-aaba-1ef9cd526f20’ could not be installed because the loading of event receiver assembly "xyzzyFeatureReceiver_0" failed: System.IO.FileNotFoundException: Could not load file or assembly ‘xyzzyFeatureReceiver_0’ or one of its dependencies. The system cannot find the file specified.
File name: ‘xyzzyFeatureReceiver_0’
   at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection)
   at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
   at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
   at System.Reflection.Assembly.Load(String assemblyString)
   at Microsoft.SharePoint.Administration.SPFeatureDefinition.get_ReceiverObject()
WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

Troubleshoot issues with Windows SharePoint Services.

I know how to deliberately cause that error: don’t install the assembly in the GAC.  But, it was in the GAC.  I normally install assemblies into the GAC by dragging them into the c:\windows\assembly folder using windows explorer.  I’ve never felt 100% comfortable doing that because I always thought that gacutil existed for a reason … so I tried that.  It made no difference.

I searched the Internets and found this post: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2243677&SiteID=1

The poster happened to be using the same root bit of code (from the Inside WSS book from this list) so that was a hopeful sign.  However, the suggestion of decorating the assembly with an [assembly: ] directive didn’t make sense to me.  I tried it anyway and I was right.  It made no difference.

Then I noticed that my class definition was not public.  I made it public and that made no difference.

Next, I went to the trouble of enabling the "assembly bind failure log" (following the helpful and accurate instructions provided) and this is where things started to get interesting.  That log shows me that the runtime is searching everywhere on that server for my assembly.  It even appears to be searching for it in my medicine cabinet.  But … it won’t search for it in the GAC.

I put on my winter jacket and go searching the Internets again and find that someone has had this problem too.  The lengthy discussion in that posting peters off into nothing and I can’t find a solution.

I move my assembly into one of the places the log claims it’s searching and I make a little more progress.  I’m rewarded with a new error in the browser when I try to activate the feature:

Failed to create feature receiver object from assembly "xyzzyFeatureReceiver_0", type "Conchango.xyzzyFeatureReceiver" for feature b2cb42e3-4f0a-4380-aaba-1ef9cd526f20: System.ArgumentNullException: Value cannot be null.
Parameter name: type
   at System.Activator.CreateInstance(Type type, Boolean nonPublic)
   at System.Activator.CreateInstance(Type type)
   at Microsoft.SharePoint.Administration.SPFeatureDefinition.get_ReceiverObject()

Troubleshoot issues with Windows SharePoint Services.

Time for one last trip to the Internets!

This time I find out, predictably enough, that MOSS issues this error because the assembly is not in GAC. 

I want to get something positive out of this and try to feel a little proud that I’ve created the Fugitive of MSIL assemblies, but it’s not working.  I’m just plain annoyed.  I find myself muttering "chicken or the egg" under my breath.

I finally decide to punt.  I create an entirely new project and copy/paste the code from the incredible-cloaked-from-the-GAC-assembly non-working project over to this new project.  (I look for a build flag called something like "hide from assembly binding if installed in the GAC" but can’t find one).

I install the feature and activate it and … it works!  So, after all that, I had to basically ‘reboot’ my project.  This is another reason why I hate computers.

I did learn something useful  from this.  I had been installing features using the stsadm command line all day long and been using the "-force" option out of habit.  For some reason, I did not use the -force option when I installed the new project.  This time, I did actually, truly forget to copy this new project’s assembly into the GAC.  As a result, I received that "FielNotFoundException" error.  This time, I got it from stsadm, not when I tried to activate the feature via the web browser.  So, -force actually plays two roles.  It allows you to re-install an existing feature.  It also allows you to install a buggy feature that cannot work at runtime by suppressing the error.  It probably says as much in the help somewhere but I never noticed it.

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Sunday Funny: Top 10 Ways To Annoy Your Wife

  1. Buy broccoli when you know there is already more than enough in the fridge.
  2. Go for a run.  Cool off.  Take off clean pillow case and replace with T-shirt.  Cover with clean pillow case.
  3. When driving, ask if we should go the wrong way down a one-way street.
  4. For 15 years, every Sunday that you wife suggests going to a museum, express surprise that museums are open on Sunday’s.
  5. For 15 years, occasionally suggest going to the local book store on Sunday.  Express surprise that they are not open on Sunday’s (thanks a lot Blue Laws!).
  6. Use 20 points to do a 3 point turn. 
  7. On a cool early Fall afternoon, walk into the room and turn on the A/C.  Complain that it’s cold.  When wife says, "then why did you turn that on, silly" and gets up to turn it off, grab the warm spot she had on the couch.  Bonus points if she does not realize you did it until much later.
  8. Open up a can of delicious white albacore tuna and eat it straight from the can, in bed, at night.
  9. Go into the kitchen while wife is eating dinner, open up the cutlery drawer and push utensils around until wife screams, "what are you looking for!"
  10. On receipt of new business cards, secretly place them all around the house: Under the bed, in pillow cases, inside coffee cups, in her purse, in coat pockets, car glove compartments, the pantry — anywhere you can think of. 
  11. Write blog entries about your wife.
  12. Wake up.
  13. When walking the streets of New York City, be on the alert for "crusty" objects on the ground.  Keeping in mind your wife’s special fears, reach down as if to pick one up up and ask, "hmm, I wonder what that is?" (Be prepared for wife to body slam you as if she’s a secret service agent protecting the President  from a sniper or you’ll find yourself laying on your back on the sidewalk).
  14. Drive twice around a parking lot looking for space.  You know you’ve really hit pay dirt when your son in the back seat yells, "Oh no! He’s doing it again!"
  15. Write "top 10" lists that don’t have 10 items.

===

Bonus wife joke:

Two male co-workers go out to lunch.  One of them tells the other, "I let loose an embarrassing Freudian slip the other night."

"A Freudian slip?  What’s that?"

"Well, when we finished eating, the waitress came by and asked how we liked our meals. I meant say, ‘I loved the chicken breast’ but instead I said ‘I loved your breasts’.  I was so embarrassed."

"Ah," his co-worker replied.  "I had the same thing happen to me this weekend with my wife.  We were eating breakfast I meant to ask her to pass the butter, but instead I screamed at her, ‘You ruined my life!’"

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Event ID 1023: “Windows cannot load extensible counter DLL MSSCNTRS”

UPDATE (04/08/08): I seem to have solved this problem.  From the command line, I ran "c:\windows\system32\lodctr /R" as per an entry talking about InstallShield problems and that appears to have solved it for me.

I have noticed that lately, my desktop/server fan never turns off.  I know it used to turn off.  I took a moment to check it out noticed that the a VMware process was running a consistent 20% utilization on one of the CPU’s.  I checked the event log and saw these errors in the application log happening dozens of times per minute:

Windows cannot load extensible counter DLL UGatherer, the first DWORD in data section is the Windows error code.

Windows cannot load extensible counter DLL UGTHRSVC, the first DWORD in data section is the Windows error code.

Windows cannot load extensible counter DLL MSSCNTRS, the first DWORD in data section is the Windows error code.

If I drill into the details of one of those messages, I get this:

Source: Perflib

Type: Error

Category: None

Event ID 1023

I did some research and there was some indication it could be a permission problem in terms of access to the DLLs in question.  I played around with that stuff but could not affect things in a positive way so I gave up on that.

VMware had been nagging me about performing an update for quite some time, so I jotted down the version I had installed (apparently "1.0.1 build 29996") and did the update.  This upgraded me to v1.04.  Sadly, it did not fix the issue.

I can stop the insane number of messages going to my application log if I shut down a service named "VMware Authorization Service".  This prevents me from using the VMware software, so … not such a great option. 

The host operating system is Windows XP 64 bit. 

I don’t think this has always happened, but I don’t recall any particular event that might have led to it.

This is why I hate computers.

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Quick & Easy: Rename Uploaded File Using SharePoint Object Model Via an Event Receiver

 

UPDATE: This works but there are significant limitations which are described in the comments.  This may still be useful in some cirumstances.

UPDATE 2: In my current project, users always upload documents.  As a result, I don’t run into a problem where MS Word is running and thinks that the file was renamed on it.  I did run into a problem, "the file was modified by someone else" and solved this via a simple semaphore type flag.  Users need to change a meta data field from its default value to something else.  The itemupdated() receiver looks for a valid value there before actually performing the rename and since then, I have not had any problems.  Your mileage may vary.

I have a client requirement to change the name of files uploaded to a specific document library to conform with a particular naming convention.  The API does not provide a "rename()" method.  Instead, we use "MoveTo(…)".  Here is a minimal bit of code to accomplish this:

 

 public override void ItemAdded(SPItemEventProperties properties)
        {
            SPFile f = properties.ListItem.File;

            f.MoveTo(properties.ListItem.ParentList.RootFolder.Url + "/xyzzy.doc");
            f.Update();

        }

The only tricky bit is the "properties.ListItem.ParentList.RootFolder.Url".  The MoveTo() method requires a URL.  That mashed up string points me to the root folder of my current document library.  This allows me to avoid any hard coding in my event receiver.

This is a more useful version that does the same thing, but assigns the name of the file to "Title":

 public override void ItemAdded(SPItemEventProperties properties)
        {
            DisableEventFiring();

            // Assign the title of this item to the name of file itself.
 // NOTE: This assignment must take place before we modify the file itself.
 // Calling update() on the SPFile seems to invalidate the properties in
 // some sense.  Updates to "Title" failed until that change (and update() call)
 // were moved in front of the change to the file name.
            properties.ListItem["Title"] = properties.ListItem.File.Name;

            properties.ListItem.Update();

            SPFile f = properties.ListItem.File;

            // Get the extension of the file.  We need that later.
 string spfileExt = new FileInfo(f.Name).Extension;

            // Rename the file to the list item's ID and use the file extension to keep
 // that part of it intact.
            f.MoveTo(properties.ListItem.ParentList.RootFolder.Url +
                "/" + properties.ListItem["ID"] + spfileExt);

            // Commit the move.
            f.Update();

            EnableEventFiring();
        }
 

Forum Discussion: Enforcing Best Practices Compliance in Non-Trivial MOSS Environment

A fellow, "Mark", has started up a potentially interesting newsgroup discussion focusing on "establishing excellent SharePoint Governance from the start" for a 35,000 user environment.

The discussion is here: http://groups.google.com/group/microsoft.public.sharepoint.portalserver/browse_thread/thread/6d9a738d981af772/1c390b15c5407db6?#1c390b15c5407db6

Pop on over and contribute!

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Custom Action URL Won’t Display for New Feature

I’m still in the habit of crafting my feature XML files by hand since it’s all quite new to me.  I don’t want to rely on a front-end tool that does stuff I don’t understand (he said as he wrote a blog entry using a tool he does not understand).

Today, I was trying to add a custom action to the site settings but it just wouldn’t show up.  I could install the feature and see it in the site features, but when I activated it (without error) it simply wouldn’t show up on the drop-down menu.

I finally realized that I misspelled "SharePoint" in the Location attribute of the <CustomAction> node.  This is the bad elements.xml file:

<?xml version="1.0" encoding="utf-8" ?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <CustomAction
 Id="SiteActionsToolbar"
 GroupId="SiteActions"
 Location="Microsoft.Sharepoint.StandardMenu"
 Sequence="100"
 Title="Hello!"
 Description="Custom menu action added via a feature."
 ImageUrl="_layouts/images/menuprofile.gif">

    <UrlAction Url="http://www.xyzzy.com"/>

  </CustomAction>
</Elements>

 

Good:

<?xml version="1.0" encoding="utf-8" ?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <CustomAction
 Id="SiteActionsToolBar"
 GroupId="SiteActions"
 Location="Microsoft.SharePoint.StandardMenu"
 Sequence="100"
 Title="Hello!"
 Description="Custom menu action added via a feature."
    >
    <UrlAction Url="http://www.xyzzy.com"/>
  </CustomAction>
</Elements>

That one took me a good two hours to figure out 🙂

I take solace in the fact that some day in the future, I’ll be able to say with conviction, "back in the day, I had to walk three miles up hill in the snow (barefoot!) in order to deploy a custom feature to MOSS.  You kids, you don’t know how easy you have it!  Get off my lawn!"

Can’t wait.

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Blog Stats

I thought some people might be interested in my blog’s statistics.  You can use mine as a benchmark to compare your own.

I’m running my blog on windows live spaces.  They collect stats for me and I don’t know any way to control that.  It’s good as far as it goes, but it’s fairly limited in that I can’t do much actual analysis with it.  I’d love, for example, to be able to generate a listing of my most frequently hit posts but I can’t do that without a prohibitive manual process.  If someone knows better, please tell me.

Live spaces status tell me: total hits for the day, total hits for the week and total hits since day zero.  It also tells me what people did to get to my blog (e.g. google, MSDN forum link, etc).

In some ways, a "hit" is obvious. If you’re reading this sentence right now, you’ve almost certainly registered as a single hit.

RSS is a little confusing.  On one hand, I see individual RSS hits all day long.  But, I also see RSS "sweeps".  A sweep is when I see 20 or 30 RSS hits all within a one or two second window.  I assume these are automated things like google checking in on my site, maybe other people’s browsers … not sure.  They are definitely some kind of automated process.  I cannot tell, however, how many of my total hits are automated and how many have an actual human on the other side.  I would guess at least 100 hits per day are automated.

On to the numbers!

I wrote my first blog entry on July 27th, 2007.

I have written approximately 60 blog entries since then, more than 50 of which directly relate to SharePoint.

I started to keep track of of my hits in a spreadsheet on a daily basis at the end of September.

Monthly Starts:

First week of: Total Hits
October 1,234
November 2,162
December 3,071
January 2008 4,253

 

Total by Month

Month Total Hits
October 6,620
November 11,110
December 13,138

 

High Water Marks

Type Total Hits
Best Day 958
Best Week 4,253
Total Hits Since Day Zero 42,438

I’m interested in others’ stats.  If you care to share yours in the comments, please do!

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Sunday Morning Funny: “Yeah, yeah, yeah. Blah, blah, blah.”

About six years ago, my four-year-old son and I were upstairs watching a Discovery channel "shark attacks" special (possibly this one).  He was very young at the point and I was always worried what he might see on a show like this and how he might take it.  I didn’t want him to develop, for example, any special fears of the water or blab something inappropriate to his friends and possibly cause his baby friend network to come crashing down.

Discovery handles these kinds of subjects very well.  It’s not about creating a fear of something, but rather to show how unusual it is for sharks to attack humans. 

So, we’re watching it and there is this one particularly scary attack involving a small girl.  As Discovery is building the drama of the attack, my son (who has always been extremely jumpy anyway), is getting very excited.  I make some noises about how unusual it is for sharks to attack people, and how bad the poor girl must feel.  I’m trying to explain that people recover from these events and become stronger for it.  However, I had misinterpreted his excitement.  He was not worried about the girl at all.  Instead, while clapping his hands, he tells me, "The sharks love it!  It’s terrific.  It’s wonderful.  Its a DREAM COME TRUE!"

I thought this was hilarious, but also very disturbing.  On the one hand, I was glad — even a little proud — that he could have strong empathic feelings, cross-species though they may be.  As humans, we need to develop our "empathic muscles" so speak or you’ll end up like this guy 🙂  On the other hand, he was feeling cross-species empathy toward a species who was exhibiting behavior inimical to his own.  I was really struggling with this when the narrator used the word "paradigm".  My son picked up on that and asked me what that meant.

That’s not such an easy word to describe to a four year old, but I gave it a try.  When I think of the word "paradigm", Thomas Kuhn is never far from my thoughts.  I read The Structure of Scientific Revolutions back at Lafayette and for better or for worse, the word "paradigm" is pregnant with extra meaning for me.  (Sort of like the word "contact" after hearing a Movie Phone voice tell me where I could see that movie [I thought the book was better]; I always say to myself, "CONTACT!" whenever I see or hear someone say "contact").

Anyway, I’m trying to explain to him a Kuhnian definition, that it’s "a historical movement of thought" and that it’s a "way of thinking with a number of built-in assumptions that are hard to escape for people living at that time."  Of course, you can’t talk like to a four-year old, so I’m trying to successively define it to smaller pieces and feeling rather proud of myself as I do so.  (I just knew that someone outside of college would care that I had read Kuhn!).

I’m just warming to the task when he interrupts me.  Waving his hand in my general direction and never taking his eyes off another brutal shark attack, he just says, "Yeah, yeah, yeah. Blah, blah, blah.".

So much for that 🙂

At that point, I decided to run away, rhetorically speaking, sit back, and enjoy watching sharks attack humans with my son.

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Switch View View Based on User ID In An InfoPath Form

We had a developed an InfoPath form with multiple views to support a new hire / on-boarding process.  When the company hires a new person, the IT department and other groups need to take action (set up payroll, enable access to appropriate applications, locate a desk, etc).  We use on form but a different view of the form for each of those functions.

At this company, most of the people involved in the business process are IT-savvy, so when they access the form, their default view is a "menu" view with buttons that direct them to their specific function.  However, we needed to simplify things for the new hire’s direct manager.  This person should not see any of the IT related stuff.  In fact, she should see just one view of the form and not even have an option to see the other views.

In our case, that direct manager’s account is directly tied to the form courtesy of a contact selector (which I am always wanting to call a "people picker" for some reason).

The steps are as follows:

1. In design mode, go to Tools -> Form Options -> Open and Save.

2. Select "rules".

3. Create a new rule whose action is "switch to view" and whose condition leverages the userName() function.

userName() returns the "simple" user name without the domain.  If I log into SharePoint with credentials "domain\pagalvin", userName() returns "pagalvin".

The contact selector provides three bits of information for a contact.  The "AccountID" portion is most useful for this scenario.  The only thing that makes this even a little bit of challenge is that the contact selector (in my environment anyway) returns the domain and user ID, as in "domain\pagalvin".  This prevents us from doing a straight-forward equality condition since AccountID ("domain\pagalvin") will never equal userName() ("pagalvin"). 

We can get around this using the "contains" operator: AccountID contains userName().

We can take it further and pre-pend a hard-coded domain in front of the userName() function to get our equality check and eliminate the risk of a false positive on the contains operator.

We would have REALLY like to automatically switch view for other users based on their AD security group membership.  For example, when a member of the "IT Analytics" group accesses the form, automatically switch to the IT Analytics view.  We didn’t have time to implement it, but my first thought is to create a web service that would have a method like "IsMemberOfActiveDirectorySecurityGroup", pass it the userName() and return back true or false.  Does anyone have any other, more clever idea?  Is there any SharePoint function we can leverage from InfoPath to make that determination?

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Accidentally Adding Code to an InfoPath Form; Deliberately Removing It

When working with buttons on a form, we often add rules.  You access the rules editor from the properties of the button.

When clicking around quickly, it’s easy to accidentally click on "Edit Form Code" instead of "Rules …".

The first time I did this, I canceled out of the code editor.  However, when I tried to publish the form a little while later, it required that I publish as an "Administrator-approved form template (advanced)".  I didn’t actually do any programming and I absolutely didn’t want to go through an unnecessary approval process.  I was in a bit of panic at the time due to time constraints.  To get past it, I simply restored a previous backup and continued.  I had recently seen some blog posts about people going into the form’s XML to tweak things and I was afraid I would have to do something similar.

Today, I did it again.  This time, I had a little more time on my hands and found that you can easily undo this.

Go to:

Tools -> Form Options -> Programming: "Remove Code"

It does not get much easier than that.

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