How to get current logged user in event receivers?

Question

I need to get the information about the user actually logged (as SPUser) inside an event receivers.

The following line:

Dim currentUser As SPUser = SPContext.Current.Web.CurrentUser

does not work because Current is set to Nothing (null).

I read around that this is due to the asynchronous nature of event receivers but then, how to get the user information I need?

EDIT: I am using ItemCheckingIn receiver to try block a user to check in a file checked out by another user.

Thank you in advance for any help

Answer 1

Use the synchronous method in your event receiver, and you should be able to retrieve the current user from the context.

Answer 2

Use this:

public override void ItemCheckingIn(SPItemEventProperties properties)
{
    base.ItemCheckingIn(properties);
    var currentUser = properties.Web.CurrentUser;
}

As you can see, properties object contain SPWeb, that have CurrentUser property.

Answer 3

You can use this code.

using (SPSite originalsite = new SPSite(properties.SiteId, properties.OriginatingUserToken))
{
  //To get the current user
  using (SPWeb web = originalsite.OpenWeb())
  {
    string strUserName = web.CurrentUser.LoginName.ToString();
  }
}

Answer 4

Not 100% sure what the behaviour is with async event receivers, but did you have a look at

WindowsIdentity windowsIdentity = WindowsIdentity.GetCurrent();

Answer 5

With 2010, the event property bag contains the OriginatingUserToken ,UserDisplayName , and UserLoginName, which you can use to get the original user.

Check the section 5. Impersonation enhancements here : http://extreme-sharepoint.com/2011/12/27/event-receivers-sharepoint-2010/