string ip = textBox2.Text;
            OleDbConnection coon = new OleDbConnection("Provider=MS Remote;Remote Server=http://"+ip+";Remote Provider=Microsoft.Jet.OLEDB.4.0; Data Source=F:\\zhao-作业\\c# 作业1\\SZqq_sever\\SZqq_sever\\bin\\Debug\\SZqq用户登记库.mdb," + "admin," + "");
            coon.Open();
            string sql;
            OleDbDataReader dr;
            sql = "select * from user_mes";
            OleDbCommand mycomm = new OleDbCommand(sql, coon);
            dr = mycomm.ExecuteReader();
            while (dr.Read())
            {
                string mima = dr["user_n"].ToString();
                string miwen = dr["mima"].ToString();
                textBox1.Text = mima + miwen;
            }
            dr.Close();