private void btndelete_Click(object sender, EventArgs e)
        {
            int txtnumber = Convert.ToInt32(dataGridView1["Sid", dataGridView1.CurrentCell.RowIndex].Value);
            string sql = "delete from xiaoshoubiao where Sid=" + txtnumber.ToString();
            try
            {
                OleDbCommand myconn = new OleDbCommand(sql, myOleConn);
                myconn.ExecuteNonQuery();
                RefreshDG();
            }
            catch (Exception ea)
            {
                MessageBox.Show(ea.Message);
            }
}
}
在“void”这出现了“应属于”class，delegate，enum，interface或struct“的错误提示，请求大神指导