JavaScript Feedback in SPItemEvents

Question

Is it possible to provide feedback to the user through javascript popup dialog?  For example, if the user attempts to delete a document, and after my custom code runs I find that I don't want the user to delete the document.  How can I inform the user that the document wasn't deleted for a reason I determined through code?

Answer 1

You will have to use Event Reciever for it. Create event reciver and attach to your document library. When user try to delete the Item then corresponding event will fire, here you add your javascript logic to show popup dialog.

Please go through this articles about the event recievers  Develop and deploy a SharePoint Event Receiver from the scratch

To add javascript popup Pop-up message in event handler

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Regards, Sandip Patil, .Net,Sharepoint Developer www.worldofsharepoint.com

Answer 2

Hi parri2bd,

               

                Thanks to share your problem.

                For you issue, I know you want to pop a  dialog by javascript but not event handler’s error page. Using event handler is ,of course, a very good train of thought, but there are a little limits on it, I don’t think it’s possible to run javascript on event handler as they don’t run in HTTP context. However, we could have a work around on it. Here I will offer you some ideas for your reference.

1.       Make use of the redirect of event handler. Custom a web application page and write your javascript into the Page_Load method, then deploy an event handler and  register it . Here is an sample code.

 

class DemoEventHandler : SPItemEventReceiver

    {

        HttpContext current;

    public DemoEventHandler()

    {

        current = HttpContext.Current;

    }

        public override void ItemDeleting(SPItemEventProperties properties)

        {

            SPUtility.Redirect("http://porter:1130", SPRedirectFlags.Trusted, current);

        }

}

2.       Customize pure javascript event handler. Here is an useful article for your reference.

http://kiran-kakanur.blogspot.com/2010/02/using-javascript-event-handlers-in.html

 

3.       Customize your webpart  with usercontrol, add SPGridView control and call your javascript by Itemdeleting event of it.

 

                Hope this could help you and feel free to let me know if you have any problem.

 

Best Regards,

Porter Wang