Datagridview双缓冲区性能较慢

Question

我从sql server中填充了datagridview。我也创建了一个使用双缓冲属性的类。

扩展方法

 public static class ExtensionMethods
 { 
    public static void DoubleBuffered(this DataGridView dgv, bool setting)
    {
        Type dgvType = dgv.GetType();
        PropertyInfo pi = dgvType.GetProperty("DoubleBuffered",
            BindingFlags.Instance | BindingFlags.NonPublic);
        pi.SetValue(dgv, setting, null);
    }
  }

加载事件中的内部表单

 private void CustomerTrans_Load(object sender, EventArgs e)
    {
        CustomersGrid.DoubleBuffered(true);

        try
        {
            using (SqlConnection connection = new SqlConnection(Connection.connectionString))
            using (SqlDataAdapter sda = new SqlDataAdapter("select TrnDocumentID,CustomerID,CustomerName,DateTime,Datetime,TrnName,SumQuantity,SumTotal,SumDiscountTotal,TableName,UserName,UserID from CustomerTrans  where DateTime >= '" + DateTime.Now.ToString("M/d/yyyy") + "'", connection))
            {
                DataTable dt = new DataTable();
                sda.Fill(dt);
                CustomersGrid.Rows.Clear();
                foreach (DataRow item in dt.Rows)
                {
                    int n = CustomersGrid.Rows.Add();
                    CustomersGrid.Rows[n].Cells[0].Value = item[0].ToString();
                    CustomersGrid.Rows[n].Cells[1].Value = item[1].ToString();
                    CustomersGrid.Rows[n].Cells[2].Value = item[2].ToString();
                    CustomersGrid.Rows[n].Cells[3].Value = Convert.ToDateTime(item[3]).ToString("dd/MM/yyyy");
                    CustomersGrid.Rows[n].Cells[4].Value = Convert.ToDateTime(item[4]).ToString("HH:mm");
                    CustomersGrid.Rows[n].Cells[5].Value = item[5].ToString();
                    CustomersGrid.Rows[n].Cells[6].Value = Convert.ToDecimal(item[6].ToString());
                    CustomersGrid.Rows[n].Cells[7].Value = Convert.ToDecimal(item[7].ToString());
                    CustomersGrid.Rows[n].Cells[8].Value = Convert.ToDecimal(item[8].ToString());
                    CustomersGrid.Rows[n].Cells[9].Value = item[9].ToString();
                    CustomersGrid.Rows[n].Cells[10].Value = item[10].ToString();
                    CustomersGrid.Rows[n].Cells[11].Value = item[11].ToString();
                }
            }

        }
        catch (Exception ex)
        {

        }

我不知道原因，但是在滚动datagridview时性能仍然很慢。还有什么我想念的吗？