Hi there,

I created a small test where I'm using an UltraTree with cells. I would like to cancel the edit mode if the text is equal to "foo". In this case I set e.Cancel to true but it doesn't seems to work.

Here is my test code:

    public partial class Form1 : Form
    {
        UltraTreeNodeColumn _colName = null;
        UltraTreeNodeColumn _colValue = null;

        UltraTreeNode _node1 = null;

        public Form1()
        {
            InitializeComponent();
            InitTree();
            InitValues();
        }

        private void InitTree()
        {
            UltraTreeColumnSet rootColumnSet = this.ultraTree1.ColumnSettings.RootColumnSet;

            this.ultraTree1.Override.CellClickAction = CellClickAction.EditCell;

            //    Use the 'OutlookExpress' ViewStyle; reduce indentation a little
            this.ultraTree1.ViewStyle = ViewStyle.OutlookExpress;
            this.ultraTree1.Indent = 10;

            //    Only allow one node to be selected at a time
            this.ultraTree1.Override.SelectionType = SelectType.Single;

            _colName = rootColumnSet.Columns.Add("Name");
            _colName.DataType = typeof(string);
            _colName.LayoutInfo.PreferredCellSize = new Size(this.ultraTree1.Width / 2, 0);

            _colValue = rootColumnSet.Columns.Add("Value");
            _colValue.DataType = typeof(object);
            _colValue.LayoutInfo.PreferredCellSize = new Size(this.ultraTree1.Width / 2, 0);
            _colValue.AllowCellEdit = AllowCellEdit.Full;

            //    Auto-fit columns
            this.ultraTree1.ColumnSettings.AutoFitColumns = AutoFitColumns.ResizeAllColumns;
        }

        private void InitValues()
        {
            _node1 = ultraTree1.Nodes.Add("key1");

            _node1.SetCellValue(_colName, "Text1");

            _node1.SetCellValue(_colValue, "Value1");
           
            UltraTreeNodeCell cell1 = _node1.Cells[_colValue];
            cell1.Editor = new EditorWithText();
            cell1.Editor.Tag = _node1;
            cell1.Editor.BeforeExitEditMode += new BeforeExitEditModeEventHandler(Editor_BeforeExitEditMode);
        }

        void Editor_BeforeExitEditMode(object sender, BeforeExitEditModeEventArgs e)
        {
            EditorWithText editor = sender as EditorWithText;
            if (editor != null)
            {
                if (editor.CurrentEditText.Equals("foo"))
                {
                    MessageBox.Show("Invalid");
                    e.Cancel = true;
                }
            }
        }
    }

Thanks for your help...