Add a event receiver handler to an specific list

Question

How can I add a event receiver handler to an specific list?

I saw that but I don't know how to use that:

http://social.msdn.microsoft.com/Forums/en-US/sharepointdevelopment/thread/11c99348-bac2-43bf-b055-433f6eca5b16/

Thanks

Answer 1

You can find a full writeup on how to create features (and their callouts) here:

http://www.codeproject.com/KB/sharepoint/ExtendingSPS.aspx

The code that you found in the other forum post is indeed the way to go.

Good luck!

Jeroen

---

My blog on WSS / MOSS development is found at http://jebass.blogspot.com

Answer 2

Below are the steps for attaching event receiver to particular list

1. Create a class library which includes a one class say "featurereceiverclass" , that class should inherit    "SPFeatureReceiver" class

2. After above step override FeatureActivated,FeatureInstalled,FeatureDeactivated,FeatureUninstalled events.

3. In "featureactivated" method write the code which is taken from the post as mentioned by you

public override void FeatureActivated(SPFeatureReceiverProperties properties)

{

SPWeb site = null;

try

{

//Adds the overridden ItemUpdated Event Receiver to a list

site = (SPWeb)properties.Feature.Parent;

SPList lst = site.Lists["ListName"];

string asmName = "AssemblyNameOfYourEventHandler, Version=1.0.0.0, Culture=neutral,  PublicKeyToken=EnterThePublicKeyTokenHere";

string itemReceiverName = "Namespace.ClassOfEventHandler";

lst.EventReceivers.Add(SPEventReceiverType.ItemUpdated, asmName, itemReceiverName);

}

}

 
lst.EventReceivers.Add(SPEventReceiverType.ItemUpdated, asmName, itemReceiverName);  

Here whatever event you want to attach specify using this line SPEventReceiverType.ItemUpdated or SPEventReceiverType.ItemAdded or SPEventReceiverType.ItemUpdating or SPEventReceiverType.ItemAdding

4. Now create a feature for attaching eventhandler

5. Create a folder in feature's folder say "EventHandlerInstaller".

6. Add a feature.xml file to it

7. In feature.xml file specify "feature receiver assembly" and "feature receiver class". "feature receiver assembly" will the assembly of class "featurereceiverclass" as mentioned above and "feature receiver class" will be "yournamspace.featurereceiverclass"

8. Now using installfeature command of stsadm install the feature and using activatefeature command of stsamd activate the feature on desired site.

9. Hope these steps helps you . If you have any queries do revert back.

Answer 3

Don't forget to update your list.
In this case:

lst.Update()

The reply above works well, i did it also.

Answer 4

Yeah..thanx Thomas for pointing out

Answer 5

bahhh I got confused...

I have created a EventHandler receiver and now this FeatureReceiver, which is the difference?

Thanks

Answer 6

EventHandler receiver is used to catch the events of list and FeatureReceiver is used to catch the events of features. In order to attach event receiver to specific list you have to use feature . So when you activate feature the code written in featureactivated event is executed and event is attached to list. If you donot want to use feature you can use console application and write the code included in the method above in console application. But use of feature is a better way to that

Answer 7

This is what I get.... It seems it doesn't recognize my snk. The .snk is in the GAC

C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\BIN>stsa

dm -o installfeature -filename EventHandlerInstaller\Feature.xml

Feature 'b901010a-caba-4366-9d7a-8449da200d3c' could not be installed because th

e loading of event receiver assembly "MyFeatureReceiver.snk" failed: System.IO.F

ileNotFoundException: Could not load file or assembly 'MyFeatureReceiver.snk' or

one of its dependencies. The system cannot find the file specified.

File name: 'MyFeatureReceiver.snk'

at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase,

Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boo

lean throwOnFileNotFound, Boolean forIntrospection)

at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, E

vidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Bool

ean throwOnFileNotFound, Boolean forIntrospection)

at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence

assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)

at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence as

semblySecurity, 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\M

icrosoft\Fusion!EnableLog] (DWORD) to 1.

Note: There is some performance penalty associated with assembly bind failure lo

gging.

To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fus

ion!EnableLog].

My Feature.xml is like this:

<?xml version="1.0" encoding="utf-8"?>

<Feature Id="B901010A-CABA-4366-9D7A-8449DA200D3C"

Title="FeatureWithReceiver"

Scope="Web"

Version="1.0.0.0"

Hidden="FALSE"

DefaultResourceFile="core"

xmlns="http://schemas.microsoft.com/sharepoint/"

ReceiverAssembly="MyFeatureReceiver.snk"

ReceiverClass="MyFeatureReceiver.MyFeatureReceiver"

>

<ElementManifests />

</Feature>

Also another question:

string asmName = "MyEventReceiver, Version=1.0.0.0, Culture=neutral,  PublicKeyToken=f3a349f2-449c-44fb-a4fa-bae32fba6822";

Where can I get that PublicKeyToken. Many GUI's have confused me.

Answer 8

wiracocha:
"In order to attach event receiver to specific list you have to use feature"
This is not correct; you are free to use an EventReceiver without the FeatureReceiver!

---

Ahmed Abuabdou SharePoint Developer Sure Technology & Consulting

Answer 9

how can I accomplish without using feature Receiver??

Answer 10

By writing a console application that has this:

using (SPSite site = new SPSite(My_site_url_here))
                {
                    using (SPWeb web = site.OpenWeb())
                    {
                        myList = web.Lists["My_list_name_here"];

                        SPEventReceiverDefinitionCollection receivers = myList.EventReceivers;
                        SPEventReceiverDefinition receiver = receivers.Add();
                        receiver.Name = "My_ItemAdded_Name_Here";  //Any name, just want a way to refer to it
                        receiver.Assembly = "MyAssemblyHere, Version=1.0.0.0, Culture=neutral, PublicKeyToken=My_assembly_GUID_here";
                        receiver.Class = "MyNamespace.MyClass";
                        receiver.Type = SPEventReceiverType.ItemAdded;  //or use whatever event you need here.
                        receiver.Update();

                    }

                 }

KevinHou

 

Answer 11

Hi vikpri,

I have already written steps to attach event receiver to list using feature

Answer 12

Don't Forget to add Security setting for your application console's code

Add site.WebApplication.FormDigestSettings.Enabled = false;
before  receiver.Update();

For more about security issue while Attaching a EventHandler on a Sharepoint List, please visit this url: http://hussainnaqvi.blogspot.com/2011/05/security-validation-for-this-page-is.html