Change displayname of a List with event receiver

Question

I need to change the displayname of a list using "ItemUpdating". The source of the new name is the "Title"-field of the item which fires the event. Is this possible? I tried it with:

if ((properties.ListTitle == "Fahrzeuge") || (properties.ListTitle == "Räume"))
            {
                base.ItemUpdating(properties);

                try
                {
                    base.DisableEventFiring();

                    string origCalTitle = properties.ListItem["Title"].ToString();
                    string newCalTitle = properties.AfterProperties["Title"].ToString();

                    if (origCalTitle != newCalTitle)
                    {
                        using (SPWeb web = properties.OpenWeb())
                        {
                            CultureInfo origCulture = Thread.CurrentThread.CurrentUICulture;

                            web.AllowUnsafeUpdates = true;

                            SPList changeList = web.Lists[origCalTitle];

                            Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)web.Language);

                            changeList.Title = newCalTitle;
                            changeList.Update();

                            web.AllowUnsafeUpdates = false;
                        }
                    }
                }
                finally
                {
                    base.EnableEventFiring();
                }
            }

I also tried it on some other way, like ItemUpdating and Afterproperties but nothing happens. Unfortunately I am not a pro in programming Event Receiver und also Google doesn´t help me out, so I need help.

Thanks for all effort!

Answer 1

public override void ItemUpdating(SPItemEventProperties properties)
    {
        SPSecurity.RunWithElevatedPrivileges(delegate()
        {
            if ((properties.ListTitle == "Fahrzeuge") || (properties.ListTitle == "Räume"))
            {

            string currentTitle = properties.ListItem["Title"].ToString();
            string newTitle = properties.AfterProperties["Title"].ToString();

            if (currentTitle != newTitle)
            {
                properties.AfterProperties["Title"] = calTitle;
            }

        }
    });
}

Answer 2

Add the code in the ItemUpdated.

I have gone through your code, sorry i missed that your elevating user lol, i can see that your using the properties object. As your using that its only read only. You have two things you can do here:

1) create the spsite and spweb object to update the list

or

2) use the itembefore and after to change the title

ItemUpdating not saving field values

    string calTitle = properties.ListItem["Title"].ToString();

    using (SPSite site = new SPSite(properties.WebUrl))
    using (SpWeb web = site.OpenWeb())
    {
       web.AllowUnsafeUpdates = true;

       SPList changelist = web.Lists[calTitle];

       changelist.Title = calTitle;
       changelist.Description = calTitle;

       changelist.Update();
       web.AllowUnsafeUpdates = false;
    }

or

if i got this right the properties should look somthing like this:

    public override void ItemUpdated(SPItemEventProperties properties)
    {
        SPSecurity.RunWithElevatedPrivileges(delegate()
        {
            if ((properties.ListTitle == "Fahrzeuge") || (properties.ListTitle == "Räume"))
            {

                string currentTitle = properties.ListItem["Title"].ToString();
                string newTitle = properties.AfterProperties["Title"].ToString();

                if (currentTitle != newTitle)
                {
                    properties.AfterProperties["Title"] = calTitle;
                }

            }
        });
    }

https://stackoverflow.com/questions/14994981/how-to-update-one-list-from-another-using-itemupdated-event-receiver-in-sharepoi

http://www.synergyonline.com/Blog/Lists/Posts/Post.aspx?ID=122