How to intercept the TAB key press to focus on a check box which becomes enabled after TAB key was pressed?

Question

When we press the TAB key we change the focus to the next control in the given tab order. In my case when I click on a check box (say X) then after pressing Tab button the control is going on a text field instead of going on next check box (say Y) which was previously disabled and became enabled after the tab button was pressed. I want the control to move to the Check box Y. Thanks.

I have following code but it is not running when I'm pressing Tab Button:

        if (((e.KeyCode == Keys.Tab && !e.Shift) || e.KeyCode == Keys.Enter)  && _resultsGrid.ActiveCell != null)
        {
            if (_resultsGrid.ActiveCell.IsInEditMode && (_resultsGrid.ActiveCell == lastEditableCell || e.KeyCode == Keys.Enter))
            {
                DateTime tempDateTime = DateTime.Today;
                if (!(_resultsGrid.ActiveCell.Column.DataType.ToString() == "System.DateTime" && !System.DateTime.TryParse(_resultsGrid.ActiveCell.Text, out tempDateTime)))
                {
                    if (_resultsGrid.ActiveCell.Text == "" && (_resultsGrid.ActiveCell.Column.DataType == typeof(System.Int16) || 
                        _resultsGrid.ActiveCell.Column.DataType == typeof(System.Int32) ||
                        _resultsGrid.ActiveCell.Column.DataType == typeof(System.Int64) ||
                        _resultsGrid.ActiveCell.Column.DataType == typeof(System.Decimal)))
                        _resultsGrid.ActiveCell.Value = 0;
                    else
                        _resultsGrid.ActiveCell.Value = _resultsGrid.ActiveCell.Text;
                }
                _returnKeyClickedToSaveRow = true;
                FireSaveEvent();
                if (!_saveFailed)
                {
                    if (e.KeyCode == Keys.Tab)
                    {
                        _checklastkey = true;
                        _resultsGrid.PerformAction(UltraGridAction.CommitRow);
                    }
                    else
                    {
                        _resultsGrid.PerformAction(UltraGridAction.CommitRow);
                        _resultsGrid.PerformAction(UltraGridAction.DeactivateCell);
                    }
                }
                _returnKeyClickedToSaveRow = false;
                this._entityDS.AcceptChanges(); //EAMNET-9811
            }
        }

Change the tab order of Checkbox Y to come after X? It will be skipped as long as it is disabled. — GolezTrol
It sounds like you're using the wrong event to decide to enable check box Y - if check box X enables check-box Y, it should probably be doing it in its checked event - it sounds like you're doing it in something like a blur/leave event, at which point the next control to move to has already been decided upon. — Damien_The_Unbeliever

Amir Amir · Accepted Answer · 2015-12-02T10:20:07

There is a property each control has which is called TabIndex. You can assign the next control which gets focused on TAB key using this property. For example If Control1 has TabIndex 1 and Control2 has TabIndex 2, after pressing TAB key on Control1, Control2 would be focused.

P.S. As TabIndex is a property in each Control, You can also dynamically decide on next control to get focused wherever you want by changing TabIndex's.

How to intercept the TAB key press to focus on a check box which becomes enabled after TAB key was pressed?

1 Answers