分组批量插入数据算法

MySqlConnection conn = new MySqlConnection(connectStr);
conn.Open();
MySqlCommand cmd = conn.CreateCommand();
const string insertHeader="INSERT INTO `local_data`(`point_id`,`path_name`,`point_value`,`store_time`) VALUES";
for (int i = 0; i < points.Count; i++)
{
    if (i%50 == 0)
    {
        cmd.CommandText=insertHeader;
    }
    if (cmd.CommandText !=insertHeader)
    {
        cmd.CommandText +=",";
    }
    cmd.CommandText += string.Format("({0},"{1}",{2},"{3}")",
    points[i].Point_ID,
    points[i].Path_Name,
    points[i].Point_Value,
    points[i].Store_Time);
    if((i > 0 && i % 50==0)||i== points.Count-1)
    {
        sqlList.Add(cmd.CommandText);
        cmd.ExecuteNonQuery();
    }
}
cmd.Dispose();
conn.Close();