调试易

OleDbConnection conn = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=d:\\jwsjk.mdb");
            conn.Open();
            OleDbCommand cmd = new OleDbCommand();
            cmd.Connection =conn;
            cmd.CommandType = CommandType.Text;
            string sql = "select qingtongqi.器名ID ,器名 ,释文 ,时代 ,著录ID  from qingtongqi, tblzhulu  where 释文 like '%" + textBox1.Text.Trim() + "%' and  qingtongqi.器名ID = tblzhulu.器名ID  ";
            DataSet ds = new DataSet();
                       OleDbDataAdapter da = new OleDbDataAdapter(sql,conn);
 da.Fill(ds);
 
            dataGridView1.DataSource = ds.Tables[0];
            dataGridView1.Show();
            conn.Close();
            conn.Dispose();
            cmd.Dispose();
            ds.Dispose();
            da.Dispose();
出现“至少一个参数没有被指定值”的异常