Фильтрация ввода в DataGridView

private void DataGridViewLayers_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            if(DataGridViewLayers.CurrentCell.ColumnIndex == 2)
            {
                TextBox DataGridViewLayersHeight = (TextBox)e.Control;
                RowChangeValue = DataGridViewLayers.CurrentCell.RowIndex;
                DataGridViewLayersHeight.KeyPress += new KeyPressEventHandler(DataGridViewLayersHeight_KeyPress);
            }
            else
            {
                TextBox DataGridViewLayersHNumberOfPoints = (TextBox)e.Control;
                RowChangeValue = DataGridViewLayers.CurrentCell.RowIndex;
                DataGridViewLayersHNumberOfPoints.KeyPress += new KeyPressEventHandler(DataGridViewLayersHNumberOfPoints_KeyPress);
            }
        }
 
        private void DataGridViewLayersHeight_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!Char.IsDigit(e.KeyChar) && e.KeyChar != 8 && (e.KeyChar != 45 || DataGridViewLayers.CurrentCell.Value!=null))
                e.Handled = true;
        }
 
        private void DataGridViewLayersHNumberOfPoints_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!Char.IsDigit(e.KeyChar) && e.KeyChar != 8)
                e.Handled = true;
        }