DataGridView中的Cell无法触发KeyPress事件，解决方法

private void DgvLayerPringSetting_EditingControlShowing(object sender,DataGridViewEditingControlShowingEventArgs e)
        {
            var cb = e.Control as ComboBox;
            
            if (cb != null)
            {
                cb.MaxLength = 2;
                cb.DropDownStyle = ComboBoxStyle.DropDown;
                cb.AutoCompleteMode = AutoCompleteMode.Suggest;
                cb.AutoCompleteSource = AutoCompleteSource.ListItems;
            }

            if (e.Control is DataGridViewTextBoxEditingControl)
            {
                var dgv = (DataGridView)sender;

                var tb = (DataGridViewTextBoxEditingControl)e.Control;

                //解除事件
                tb.KeyPress -= dataGridViewTextBox_KeyPress;

                //需要添加事件的列
                if (dgv.CurrentCell.ColumnIndex == 4 || dgv.CurrentCell.ColumnIndex == 5)
                {
                    //事件追加
                    tb.KeyPress += dataGridViewTextBox_KeyPress;
                }
            }


        }