datagridview不能实时刷新数据的处理

有一种情况，datagridview不是通过绑定datatable刷新数据的，可以采用
this.datagridview.refreshedit来刷新修改的数据，例如：
//做数据验证，格式化成两位小数，更新不了数据，
private void skinDataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{
if (e.RowIndex > -1 && e.ColumnIndex > -1)
{
DataGridView grid = (DataGridView)sender;
grid.Rows[e.RowIndex].ErrorText = “”;

            if ((grid.Columns[e.ColumnIndex].Name == "ylgeren") || ((grid.Columns[e.ColumnIndex].Name == "yldanwei")) || ((grid.Columns[e.ColumnIndex].Name == "yilgeren")) || ((grid.Columns[e.ColumnIndex].Name == "yildanwei")))
            {
                try
                {
                    // this.skinDataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
                    string amount = Convert.ToDecimal(e.FormattedValue.ToString()).ToString("N2");// Convert.ToDecimal(e.FormattedValue);
                    //MessageBox.Show(amount);
                    this.skinDataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = amount;
                    this.skinDataGridView1.RefreshEdit(); //解决不能自动刷新修改的数据的关键！！！

                    //(skinDataGridView1.CurrentRow.DataBoundItem as DataRowView).EndEdit();
                    //this.skinDataGridView1.Update();
                    // MessageBox.Show(this.skinDataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString());
                    //return;


                }
                catch
                {
                    e.Cancel = true;
                    grid.Rows[e.RowIndex].ErrorText = "Please enter a number!";
                    MessageBox.Show("格式不对！");
                    return;
                }
            }
        }          
    }