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Author: 
Posted: 3/29/2006 12:19:55 PM

Sitecore version: tested with 5.1.1.11

The Solution:

Use the code below to solve the problem

1)  Add event to “item:added”

      <event name="item:added">

        <handler type="PreventDouble.AddedEventHandler, PreventDouble" method="OnItemAdded"/>

      </event>

2)  Here is the code:

using System;

 

using Sitecore;

using Sitecore.Configuration;

using Sitecore.Events;

using Sitecore.Data;

using Sitecore.Data.Items;

using Sitecore.Pipelines.Save;

 

namespace PreventDouble

{

   publicclass AddedEventHandler

   {

      publicvoid OnItemAdded(object obj, EventArgs args)

      {

         Item itm = Event.ExtractParameter(args, 0) as Item;

         if ( itm.Database.Name == "master" )

         {

            Database database = Factory.GetDatabase("master");

            Item existItm = database.Items[itm.Paths.Path];

            SitecoreEventArgs evt = args as SitecoreEventArgs;

            if (existItm.ID != itm.ID)

            {

               Sitecore.Context.ClientPage.ClientResponse.Eval("alert('You cannot create item with the same name!')");

               itm.Delete();

               evt.Result.Cancel = true;

            }

         }

     }

   }

}

 

For Sitecore 5.3.1 code should be like this:

 

using System;

using Sitecore;

using Sitecore.Configuration;

using Sitecore.Events;

using Sitecore.Data;

using Sitecore.Data.Items;

using Sitecore.Pipelines.Save;

using Sitecore.Collections;

namespace PreventDouble
{
    public class AddedEventHandler
    {
        public void OnItemAdded(object obj, EventArgs args)
        {

            Item itm = Event.ExtractParameter(args, 0) as Item;

            if (itm.Database.Name == "master")
            {

                Database database = Factory.GetDatabase("master");

                Item[] list = itm.Parent.Axes.SelectItems("*[@@name='"+itm.Name+"']");

                if (list == null)
                {
                    return;
                }

                SitecoreEventArgs evt = args as SitecoreEventArgs;

                foreach (Item existItm in list)
                {

                    if ((existItm.ID != itm.ID))
                    {

                        Sitecore.Context.ClientPage.ClientResponse.Eval("alert('You cannot create item with the same name!')");

                        itm.Delete();

                        evt.Result.Cancel = true;

                        return;

                    }
                }

            }
        }
    }
}

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