从DatagridView和数据库中删除行

Question

我正在尝试从datagrid视图和数据库中删除所选行。我的代码是从datagridview中删除而不是从实际数据库中删除，我有什么问题吗？

private void btnDelRecord_Click(object sender, EventArgs e)
        {

            for (int i = 0; i < dataGridView2.Rows.Count; i++)
            {
                DataGridViewRow dr = dataGridView2.Rows[i];
                if (dr.Selected == true)
                {
                    dataGridView2.Rows.RemoveAt(i);

                        Query = "Delete from TblEmployer where Id=" + i + "";
                        theReader = conn.ExecuteStatement(Query);
                        conn.CloseConnection();
                        MessageBox.Show("Deleted");
                    }


                }

谢谢