Can someone please explain the relationship between a RepositoryItem and the
Editor. For example, the RepositoryItemLookUpEdit and the LookUpEdit. I
understand that the RepositoryItem is used as a template to configured
default values of the Editor and that some of the Editor Events are raised
through the RepositoryItem (as if it were a wrapper around the Editor), but
when does the Editor get instantiated and bound to the underlying DataSoure?
How do you access the Editor from the DataSource? How do you access the
Editor from the RepositoryItem?

I have part of the puzzle but I'm looking for more information.
The LookUpEdit.Properties will return the RepositoryItemLookUpEdit, but how
do you go in the reverse direction?
The RepositoryItemLookUpEdit is about the a GridColumn via the ColumnEdit
property but how does this allow access to the LookUpEdit?

TIA

 this is all documented in the docs. the RepositoryItem has a static constructor, that is run before the normal constructor, and that invokes the editor. here's how it is in an extension to LookUpEdit i wrote:

        /// <summary>
        /// Register the <see cref="LookUpEditEx"/> and <see cref="RepositoryItemLookUpEditEx"/>
        /// before the main constructor is called.
        /// </summary>
        /// <remarks>Calls <see cref="RegisterLookUpEditEx"/>.</remarks>
        static RepositoryItemLookUpEditEx()
        {
            RegisterLookUpEditEx();
        }

        /// <summary>
        /// Register this repository item and its editor
        /// </summary>
        public static void RegisterLookUpEditEx()
        {
            Image img = null;
            try
            {
                img = (Bitmap)Bitmap.FromStream(Assembly.GetAssembly(typeof(LookUpEdit))
                    .GetManifestResourceStream("DevExpress.XtraEditors.Bitmaps256.LookUpEdit.bmp"));
            }
            catch
            {
            }
            EditorRegistrationInfo.Default.Editors.Add(new EditorClassInfo(_editorName,
                typeof(LookUpEditEx), typeof(RepositoryItemLookUpEditEx), typeof(LookUpEditViewInfo),
                new ButtonEditPainter(), true, img, typeof(PopupEditAccessible)));
        }

you also have to override EditorTypeName:

        /// <summary>
        /// Get the name of the associated <see cref="LookUpEditEx"/> editor
        /// </summary>
        /// <value>The name of the editor</value>
        public override string EditorTypeName
        {
            get
            {
                return _editorName; //_editorName=="LookUpEditEx"
            }
        }

the editor also has a static constructor that registers the RepositoryItem:

        /// <summary>
        /// Register the <see cref="LookUpEditEx"/> and <see cref="RepositoryItemLookUpEditEx"/>
        /// </summary>
        static LookUpEditEx()
        {
            RepositoryItemLookUpEditEx.RegisterLookUpEditEx();
        }

and an override of it's own EditorTypeName, that returns "LookUpEdit". 

<Tsahi Asher> wrote in message news:200843@community.devexpress.com...

 this is all documented in the docs. the RepositoryItem has a static constructor, that is run before the normal constructor, and that invokes the editor. here's how it is in an extension to LookUpEdit i wrote:

        /// <summary>
        /// Register the <see cref="LookUpEditEx"/> and <see cref="RepositoryItemLookUpEditEx"/>
        /// before the main constructor is called.
        /// </summary>
        /// <remarks>Calls <see cref="RegisterLookUpEditEx"/>.</remarks>
        static RepositoryItemLookUpEditEx()
        {
            RegisterLookUpEditEx();
        }

        /// <summary>
        /// Register this repository item and its editor
        /// </summary>
        public static void RegisterLookUpEditEx()
        {
            Image img = null;
            try
            {
                img = (Bitmap)Bitmap.FromStream(Assembly.GetAssembly(typeof(LookUpEdit))
                    ..GetManifestResourceStream("DevExpress.XtraEditors.Bitmaps256.LookUpEdit.bmp"));
            }
            catch
            {
            }
            EditorRegistrationInfo.Default.Editors.Add(new EditorClassInfo(_editorName,
                typeof(LookUpEditEx), typeof(RepositoryItemLookUpEditEx), typeof(LookUpEditViewInfo),
                new ButtonEditPainter(), true, img, typeof(PopupEditAccessible)));
        }

you also have to override EditorTypeName:

        /// <summary>
        /// Get the name of the associated <see cref="LookUpEditEx"/> editor
        /// </summary>
        /// <value>The name of the editor</value>
        public override string EditorTypeName
        {
            get
            {
                return _editorName; //_editorName=="LookUpEditEx"
            }
        }

the editor also has a static constructor that registers the RepositoryItem:

        /// <summary>
        /// Register the <see cref="LookUpEditEx"/> and <see cref="RepositoryItemLookUpEditEx"/>
        /// </summary>
        static LookUpEditEx()
        {
            RepositoryItemLookUpEditEx.RegisterLookUpEditEx();
        }

and an override of it's own EditorTypeName, that returns "LookUpEdit". 

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http://community.devexpress.com//forums/p/59382/200843.aspx#200843