String commStrs = ConfigurationManager.ConnectionStrings["CommStrs"].ConnectionString;
            using (SqlCeConnection comm = new SqlCeConnection(commStrs))
            {
                comm.Open();
                MessageBox.Show("进入");
                using (SqlCeCommand cmd = comm.CreateCommand())
                {
                     = "Insert into T_table(mz)values(@mz)";
                    for (int i = 0; i < a.Count; i++)
                    {
                        cmd.Parameters.Clear();
                        cmd.Parameters.Add(new SqlCeParameter("mz", a[i]));
                    }
                    MessageBox.Show("导入成功");
                }
            }
        }
这是我自己写的代码，不报错，但是就是存不进数据库，所有的数据都在list <string> a里面了，赶紧来个程序猿帮忙吧，在线等啦！

cmd你都没执行插入的方法,只是添加了参数而已.要执行cmd.ExecuteNonQuery();

comm 用完也没关闭..

用了using不用关闭.