Hi,

I have a action handler which stops people deleting certain types of DocumentType.

I would like to alert to tell the user why this cannot be deleted (and stop the tree from being reloaded). Can anyone point me in the correct direction regaridng this?

Here is my code which does not alert:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using umbraco.BusinessLogic;
using umbraco.cms.businesslogic;
using umbraco.cms.businesslogic.web;
using System.Web;



namespace umbraco_ext
{
    public class BasePage : System.Web.UI.Page
    {

        protected override void OnLoad(EventArgs e)
        {
           
           
           
            base.OnLoad(e);

        }

    }

    public class AppBase : umbraco.BusinessLogic.ApplicationBase
    {

        public AppBase()
        {
            Document.BeforeMoveToTrash += new   Document.MoveToTrashEventHandler(Document_BeforeMoveToTrash);
           
            
        }

        void Document_BeforeMoveToTrash(Document sender, MoveToTrashEventArgs e)
        {

                    
                                               
            e.Cancel = true;
            Document obj = new Document(sender.Id);
            Type csType = this.GetType();


      System.Web.UI.ScriptManager.GetCurrent(((BasePage)obj.HttpContext.CurrentHandler)).(((BasePage)obj.HttpContext.CurrentHandler), ((BasePage)obj.HttpContext.CurrentHandler).GetType(), "msg", "alert('djd');", true);


           
           
        }
    }
}

Any help would be much appreciated.

Thanks

Scott