BeforeProperties and AfterProperties

2012-11-212014-11-30 Andy BurnsEvent Receivers, SP2007 Development, SP2010 Development, SPItemEventReceiverLeave a comment

I am sick of having to hunt down the link to Synergy’s post on the BeforeProperties and AfterProperties available in different events on SPListItems. For my reference, here it is:

List:

List	BeforeProperties	AfterProperties	properties.ListItem
ItemAdding	No value	New value	Null
ItemAdded	No value	New value	New value
ItemUpdating	No value	Changed value	Original value
ItemUpdated	No value	Changed value	Changed value
ItemDeleting	No value	No value	Original value
ItemDeleted	No value	No value	Null

Document Library:

Library	BeforeProperties	AfterProperties	properties.ListItem
ItemAdding	No value	No value	Null
ItemAdded	No value	No value	New value
ItemUpdating	Original value	Changed value	Original value
ItemUpdated	Original value	Changed value	Changed value
ItemDeleting	No value	No value	Original value
ItemDeleted	No value	No value	Null

Note: Allegedly, this does change if the event receiver is synchronous – the before properties are available. I’ve not checked this out yet.

Obviously, for SharePoint 2007 systems that doesn’t apply – as ‘*ed’ event receivers are always asynchronous.

ContentIterator – Curious Behaviour, and Infinite looping

2012-11-012014-11-30 Andy BurnsContentIterator, SP2010 DevelopmentLeave a comment

I like the ContentIterator control – it’s a nice way of being able to process a lot of items in SharePoint. However, sometimes it’s behaviour is … strange.

I had been using it to loop over some (but not all) the items in a list. Some changes meant that I was now going to loop over all the items. I had a list with 500 items that I was testing with. My code was:

ContentIterator ci = new ContentIterator("example");
SPQuery qry = new SPQuery();
qry.Query = ContentIterator.ItemEnumerationOrderByNVPField;
ci.ProcessListItems(list,qry, ProcessItem, ProcessItemError);

This would process the first 200 items, over and over. It never reached an end. Hmm. Continue reading “ContentIterator – Curious Behaviour, and Infinite looping” →

Exchange Tasks integration with iOS and OSx

2012-10-192014-11-30 Andy BurnsExchange, iOS, OSx, Outlook6 Comments

Outlook has Tasks. I tend to flag emails that I need to take further action on, and they appear in my tasks list in Exchange:

iOS 5 and OSx (Mountain Lion or later) have ‘Reminders’. I figured that it must be possible to show Tasks from Exchange – after all, I could already sync Email and Calendars. So I set this up … and no tasks came through. Puzzling. Continue reading “Exchange Tasks integration with iOS and OSx” →

HTML 5 – Email Address Validation Regex

2012-10-182014-11-30 Andy BurnsDevelopment, Email, regex2 Comments

And interesting one to stumble upon – the ‘official‘ regex for validating a email address:

Edit: I’ve had to break this down into parts – for some reason WordPress throws a 403 error if I don’t. I think it sees this regex as a security risk!

Before the @ sign:
^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+

The @ sign and after:
@[a-zA-Z0-9-]+(?:.[a-zA-Z0-9-]+)*$

Reads like it should work pretty well to me. I didn’t realise before the @ was so generous. And you could shrink it by using a case insensitive operator.

Select AirPlay from Volume Control

2012-10-122014-11-30 Andy BurnsAirPlay, OSxLeave a comment

From Mac OSx Hints:

If you have the Volume menu visible in the menu bar, clicking on this icon displays a simple volume slider. But if you hold the Option key when you click on the icon, you can select audio inputs and outputs directly, including nearby devices compatible with AirPlay.

Delete Event Receiver from a Content Type with Code

2012-10-102014-11-30 Andy BurnsContent Type, Event Receivers, SP2010 Development, SPContentType, SPItemEventReceiverLeave a comment

SharePoint allows you to attach event receivers to content types. That’s pretty handy. Unfortunately, deleting event receivers from those content types is much more hard. Perhaps this is why the Document ID feature fails to remove the content types that it adds. However, here is one possible approach.

SPContentType ctype = site.RootWeb.ContentTypes[SPBuiltInContentTypeId.Document];
if (ctype != null)
{
 if (ctype.EventReceivers != null)
 {
   bool bContinueDelete = true;
   while (bContinueDelete)
   {
     if (ctype.EventReceivers.Count < 1)
     {
       bContinueDelete = false;
     }
     else
     {
     bool bFoundOne = false;
     foreach (SPEventReceiverDefinition d in ctype.EventReceivers)
     {
         //Could match on the Type of the event receiver, but for this example, let's use name
         if (d.Name.Contains("Document ID"))
         {
           d.Delete();
           ctype.Update(true, false);
           bFoundOne = true;
           break;
         }
     }
     if (!bFoundOne)
     {
       bContinueDelete = false;
     }
   }
 }
}

More on why this is important in a later post.

Change Default Save Location from iCloud

2012-10-092014-11-30 Andy BurnsOSxLeave a comment

This is a note for myself, found on Mac OSx Hints.

I don’t like the iCloud UI for OSx – it’s inferior to Dropbox. As each application has it’s own iCloud storage it’s pretty hard to store a heterogeneous set of documents relating to a project or customer. For example, a Contract document and an Expenses spreadsheet would be invisible from each other’s program – and Finder.

So, the hell with iCloud by default – let’s use the filesystem. In terminal, run:

defaults write NSGlobalDomain NSDocumentSaveNewDocumentsToCloud -bool false

Slow Site Creation in SharePoint 2010

2012-10-052014-11-30 Andy BurnsSP2010 Admin, STSADMLeave a comment

I have a development machine that I was creating a number of sites within. I wanted to create about 10,000 sites or so (and have done more than that in testing before without a problem). When I started the process that was creating these running on my machine it was taking about 20 seconds per site. After a mere 2000 sites, it was then talking 30 minutes per site. Something isn’t right.

I did a bit of digging and found that others have had the same problem – but no solution.

I then spoke to one of our administrators, and he suggest clearing out the ‘event cache’ table. I’d never heard of that (and I’ve no idea how he found out about it), but his advice was:

Minimise the amount of rows in the EventCache SQL table:

set ChangeLogRetentionPeriod to 1 day (1.00:00:00) on web application

set EventLogRetentionPeriod to 1 day (1.00:00:00) on web application

set ‘Change Log’ timer job to run daily (default is weekly)

Okay, so I did this using STSADM:

stsadm -o setproperty -pn change-log-retention-period -pv 1 stsadm -o setproperty -pn event-log-retention-period -pv 1

…and I then changed the Change Log timer job’ schedule in central admin, and set it running right away.

The timer job took about 8 minutes to run. That was a surprisingly long time.

When I then tried creating a site, it took 7 minutes. Clearly, this is still an unwell system, but that’s a lot better than 30 minutes. I’ll update if I find more.

Fixing Duplicate Icons in OSX Launchpad

2012-10-052014-11-30 Andy BurnsOSx2 Comments

I know, a little off-topic for a mostly SharePoint/.NET blog, but after a recent upgrade I found I had duplicate iPhoto icons in Launchpad. That frustrated me. I did a bit of Googling, and found others had the same problem, and were suggesting deleting the database that stores the Launchpad’s details. When the Dock was reloaded, it would recreate that database. Unfortunately, it would also lose the layout of all your folders and icons.

“Delete the database”, I thought, “It’s a database, how hard can it be to fix that?”

So I set out to fix the database without deleting it, and losing all my folders… Continue reading “Fixing Duplicate Icons in OSX Launchpad” →

Every Developer should know about Cryptography

2012-08-162014-11-30 Andy Burnscrypto, DevelopmentLeave a comment

It fascinates me, but it seems like a lot of developers don’t know a lot about cryptography. Certainly, the litany of security bloopers caused by incorrectly implemented crypto makes it appear that way.

Encryption isn’t something that I work with every day, but as a web developer you can’t really get away from needing to secure something – and that means encryption.So, to overcome some of this it’s worth a bit of reading.

Bruce Schneier is a pretty interesting author. His books on Applied Cryptography and Practical Cryptography are excellent, and well worth a read for anyone starting to work with crypto. His blog is also an interesting discussion of security and risk in a wider context.

Troy Hunt has managed to write a number of posts that have grabbed my attention over the year or so. “Lessons in web site security anti-patterns” is just that, “A brief Sony password analysis” is fascinating, and “Our password hashing has no clothes” was eye opening. I like that his posts are strongly based on systematic analysis.

Cryptography on StackExchange can be interesting. It’s where I first heard of scrypt, which is quite interesting.

Anyway, I’ll try and update this if I find new, useful resources, or post your own favourites in the comments.

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