目的是当当前cell离开时做验证,如果验证不通过,设置为红色背景色并且字符全选现在,在CellValidating事件中写了设置,可是只要e.Cancel = true就不显示设置的背景色
还有DataGridViewTextBoxCell中没有,selectall方法        private void uvasBaseGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
        {
            DataGridViewColumn clmCurren = uvasBaseGridView1.Columns[e.ColumnIndex];
            if (clmCurren.Name == "SALE")
            {                if (int.Parse(uvasBaseGridView1.CurrentCell.EditedFormattedValue.ToString()) > 99999)
                {                    //MessageBox.Show("max input number is 99999");                    DataGridViewTextBoxCell tb = (DataGridViewTextBoxCell)uvasBaseGridView1.CurrentCell;                    tb.Style.BackColor = System.Drawing.Color.Red;                                        e.Cancel = true;
                }
            }        }