网格视图在运行时不显示最上面的行

首次发布，长期搜索。我相信这是一个简单的解决方案。。。。但我在这里撞到头了。使用visual studio 2012

我有一个网格视图，它在代码后面使用sql进行行数据绑定。问题是，当我运行它时，第一行不会显示在网格视图上。这些数据是非常动态的，并且不断变化。有什么建议吗？

代码：

sql2 = "select cf.cfs_no, us.unit_id, ua.unit_activity_description, ct.call_description, cf.premise_name, us.location " +
                           "from dba.units_service us with(nolock) " +
                            "left outer join dba.cfs cf with(nolock) on " +
                            "us.cfs_key = cf.cfs_key " +
                            "left outer join dba.call_type ct with(nolock) on " +
                            "cf.call_type = ct.call_type_cd " +
                            "left outer join dba.unit_activity ua with(nolock) on " +
                            "us.unit_activity_cd = ua.unit_activity_cd " +
                            "where " +
                            "(agency_id in (@agency_id) and us.unit_activity_cd != @unit_activity) " +
                            "order by 1 desc, 2 desc ";
                    //agency_id = @varrible ; us.unit_activity_cd = @varrible
                    using (SqlCommand cmd = new SqlCommand(sql2, con))
                    {
                        //con.Open();
                        SqlDataReader reader1 = cmd.ExecuteReader();
                        //SqlDataAdapter da = new SqlDataAdapter(cmd);
                        if (reader1.HasRows)
                        {
                            reader1.Read();
                            GridView1.DataSource = reader1;
                            GridView1.DataBind();
                        }

网格视图中是否存在可能导致此问题的属性？gridview是RowDatabound，并且有代码来处理它。我只是觉得它的属性有些愚蠢。

谢谢！

using (SqlDataReader reader = cmd.ExecuteReader())
{
    DataTable table = new DataTable();
    table.Load(reader);
    GridView1.DataSource = table;
}