Hot wo add event receiver to a SharePoint list

This is very generic and everyone knows how to add an event receiver. But,
usually we attach the event receiver on a list template, site etc. This post
deals with adding event receiver to a specific list.

1. private void AddEventReceiverToAList(string siteUrl)  


2. {  


3. using (SPSite site = new SPSite(siteUrl))  


4. {  


5. using (SPWeb web = site.OpenWeb())
    


6. {  


7. try 


8. {  


9. SPList list = web.Lists["myList"];  


10. if (list != null)  


11. {  


12. int receivers = list.EventReceivers.Count;
     


13. string className = "EventReceiverClass";  


14. string asmName = "EventReceiverAssemblyName, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a865f0ecc234ea51";
     


15. web.AllowUnsafeUpdates = true;  


16. bool isAddedReceiverExist = false;  


17. for (int i = 0; i < receivers; i++)
     


18. {  


19. SPEventReceiverDefinition eventReceiver = list.EventReceivers[i];
     


20. if (eventReceiver.Class == className && eventReceiver.Type == SPEventReceiverType.ItemAdded)
     


21. {  


22. isAddedReceiverExist = true;
     


23. break;
     


24. }  


25. }  


26. if (!isAddedReceiverExist)
     


27. list.EventReceivers.Add(SPEventReceiverType.ItemAdded, asmName, className);
     


28. }  


29. }  


30. catch { }
     


31. finally 


32. {  


33. web.AllowUnsafeUpdates = false;  


34. }  


35. }  


36. }  


37. } 

private void AddEventReceiverToAList(string siteUrl) { using (SPSite site = new SPSite(siteUrl)) { using (SPWeb web = site.OpenWeb()) { try { SPList list = web.Lists["myList"]; if (list != null) { int receivers = list.EventReceivers.Count; string className = "EventReceiverClass"; string asmName = "EventReceiverAssemblyName, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a865f0ecc234ea51"; web.AllowUnsafeUpdates = true; bool isAddedReceiverExist = false; for (int i = 0; i < receivers; i++) { SPEventReceiverDefinition eventReceiver = list.EventReceivers[i]; if (eventReceiver.Class == className && eventReceiver.Type == SPEventReceiverType.ItemAdded) { isAddedReceiverExist = true; break; } } if (!isAddedReceiverExist) list.EventReceivers.Add(SPEventReceiverType.ItemAdded, asmName, className); } } catch { } finally { web.AllowUnsafeUpdates = false; } } } }

This is very straight forward code and hope you got it.