I have created an event handler for ItemAdded so that when an item is added on the site, my code checks to see if it's a folder. If it is, it should change the content type of that folder to a custom content type.

The event isn't firing, so I was wondering if I'm doing it the right way and/or in the right place. Here is my code:

public class ItemAddedHandler : SPItemEventReceiver
    public override void ItemAdded(SPItemEventProperties properties)

        SPListItem listItem = properties.ListItem;
        SPList list = properties.ListItem.ParentList;
        SPContentType contentType;

        if (listItem.FileSystemObjectType == SPFileSystemObjectType.Folder &&
           (list.Title == "Apps" || list.Title == "Data" || list.Title == "Public"))
            contentType = list.ContentTypes["Custom Folder"];

            listItem["Content Type"] = contentType.Name;
            listItem["Content Type ID"] = contentType.Id.ToString();

Please let me know if I'm doing anything wrong to accomplish this task. Thanks very much in advance.

As requested, the feature was adding with the following method:

  1. Signed and compiled above code and copied DLL to server
  2. Copied DLL to GAC
  3. Created folder: C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\FEATURES\SPEventHandler
  4. Created Feature.xml using GUID generated with Visual Studio:
<?xml version="1.0" encoding="utf-8" ?>
 <Feature Scope="Web" Title="Added Event Handler" 
     <ElementManifest Location="Elements.xml"/>
  1. Created Elements.xml using PublicKeyToken of DLL in GAC and ListTemplateID for working with a document library (101):
<?xml version="1.0" encoding="utf-8" ?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <Receivers ListTemplateId="101">
      <Assembly>SPEventHandler, Version=, Culture=neutral, 
  1. Ran the following command on the server: stsadm -o installfeature -filename SPEventHandler\Feature.xml
  2. On the site (SP 2007), Site Actions -> Site Settings -> Modify All Site Settings -> Site features and activated "Added Event Handler"

After these steps, creating a new item in a list on this site does not seem to do anything, including writing to the event log, so I'm wondering if it is even getting run at all.


2 Answers 2


What about changing:

listItem["Content Type"] = contentType.Name;
listItem["Content Type ID"] = contentType.Id.ToString();


listItem["ContentTypeId"] = contentType.Id;
  • That didn't work.
    – Music Magi
    Jun 2, 2011 at 13:21
  • 1
    MBSurf's suggestion should work and is what I've used. Jun 2, 2011 at 13:38
  • 1
    How did you add the event handler to the list/content type? Can you edit your question and add the feature's CAML and any feature activation code?
    – MBSurf
    Jun 2, 2011 at 16:57
  • 1
    Have you checked the ULS Logs? Typically, if SharePoint can't instantiate the class, it will let you know in there right after you create the item.
    – MBSurf
    Jun 2, 2011 at 18:19
  • 1
    The other thing I noticed is that you have { } brackets around your feature Id. Typically for feature Ids these are not recommended. Note: this is sort of a long shot since it seems to be seeing your feature after you run your install command.
    – MBSurf
    Jun 2, 2011 at 18:22

I figured it out. My custom content type needed to be enabled for the document library before an item could be given that content type. Thanks everyone for your responses.

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