For a while ago I needed to copy all files from a document library within a SharePoint 2007 site to the hard drive. So I didn’t need to copy files from SharePoint to SharePoint so I couldn’t use the stsadm -o export command or Chris O’Brien’s nice SharePoint Content Deployment Wizard. I came across the SPIEFolder application which should work with SharePoint 2007 and 2010. It has a site on codeplex: spiefolder.codeplex.com, but neither the binary nor the source code can be downloaded from there. After some searching I found the binary in the author’s skydrive. The fact that the source code was not available seemed as an disanvantage because I could not know what code was run. Nevertheless I tried it out and it didn’t work:

Today I needed to “clean” a list, meaning to remove all list items. For some time ago I wrote a post about different ways of removing list items in bulk: Server Object Model, SPLinq and RPC.  This time I had only the web browser. So I tried the jsom way. By the way, the javascript documentation for jsom on msdn is getting really good. Don’t miss that: How to: Complete basic operations using JavaScript library code in SharePoint 2013. Now here comes theworking code I used to remove all items in my list:

If there are many list items you try retrieve with javascript object model,paging could be very useful. Today I came across a wonderful blog post series about javascript object model in SharePoint: The SharePoint javascript object model - Resources and Real World Examples posted by David Mann and published on Aptilon Blog. There is an example how to achieve paging with JSOM. The key is items.get_listItemCollectionPosition() and query.set_listItemCollectionPosition() I have refactored David’s example to avoid global variables and to put into a module. Here is it. If you have a Tasks list in your site with many items, just hit F12 to open the console and paste this and see the result:

If you have used Issue tracking list template in SharePoint you must have marked that the comments are added and marked with author name and datetime. It is handy to have these micro “discussion boards” on items. The comment-formed communication can help to fine-tune task definitions. By the way, have you seen Trello? So the question is how we can create this column in other lists? Here is a little tutorial how to create “append-only comments”, as they are called:

When you create an eventreceiver, you get the ListTemplateId attribute. It works fine. But if you want the eventreceiver to trigger on one particular list, just replace ListTemplateId attribute with ListUrl. For Pages you can use:

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <Receivers **ListUrl="$Resources:cmscore,List\_Pages\_UrlName;"**\>
    <Receiver>
      <Name>NewsPageEventReceiverItemUpdated</Name>
      <Type>ItemUpdated</Type>
      <Assembly>$SharePoint.Project.AssemblyFullName$</Assembly>
      <Class>Contoso.EventReceivers.NewsPageEventReceiver.NewsPageEventReceiver</Class>
      <SequenceNumber>1000</SequenceNumber>
    </Receiver>
  </Receivers>
</Elements>

How do we get a list? Perhaps like that:

var list = web.Lists\[listname"\];
```But we must be aware of exceptions that can appear and we must handle them. A better way to get a list is to use [TryGetList](http://sharepoint.stackexchange.com/questions/18035/custom-webpart-being-rendered-twice-on-layout-page):

var list = web.Lists.TryGetList(listname);

Jonas Nilsson shows an interesting approach for working with SPSite and SPWeb which must be disposed. Create a helper method WithWeb and send an Action parameter:

public void WithWeb(string uri, Action<SPWeb> action)
{
    using (SPSite site = new SPSite(uri))
    {
        using (SPWeb web = site.OpenWeb())
        {
            action(web);
        }
    }
}
```Here is my implementation of this pattern:

public static class DisposalService {     public static void WithWeb(string uri, Action action)     {         using (var site = new SPSite(uri))         {             using (var web = site.OpenWeb())             {                 web.UnsafeUpdate(action);             }         }     }     public  static void WithElevatedWeb(string uri, Action action)     {         SPSecurity.RunWithElevatedPrivileges(() => WithWeb(uri, action));     } }

Diskussioner sparas i en vanlig lista. En ny tråd sparas som en folder. Alla svar sparas som SPListItem i den foldern. En folder är så klart också en SPListItem, fast har en annan typ. För att se om det är en tråd, kan man jämföra ett fält som har ett guid som man kommer åt via SPBuiltInFieldId.FSObjType.  

var item = properties.ListItem;
var type = Convert.ToInt32(item\[SPBuiltInFieldId.FSObjType\]);
var foldertype = (int) SPFileSystemObjectType.Folder;
if (type == foldertype)
{
	//Yes, this is the thread head
	var body = item\["Body"\].ToString();
}

AfterProperties kommer inte leda till Exception, men de kommer returnera bara null, om du använder DisplayName. Man måste ha InternalName. Här är ett litet exempel på hur man kan få ut värden före och efter uppdateringen. Exemplet har testats i ItemUpdated-eventreceiver.

var before = properties.BeforeProperties;
var after = properties.AfterProperties;
var contentDisplayName = "News Content";
var list = properties.List;
var contentInternalName = list.Fields\[contentDisplayName\].InternalName;
var contentBefore = before\[contentInternalName\];
var contentAfter = after\[contentInternalName\];

Det finns en fin lista över id på kolumner som man kan lägga till. Här är ett exempel hur man kan använda det. Här är ett exempel på två extra kolumner i contenttype:

    
<FieldRefs>
      <FieldRef ID="{23f27201-bee3-471e-b2e7-b64fd8b7ca38}"/>
      <!-- Enterprise Keywords-->
      <FieldRef ID="{3de94b06-4120-41a5-b907-88773e493458}"/>
      <!-- PublishingImage-->
 </FieldRefs>