OleDbConnection myConn = new OleDbConnection();
            myConn.ConnectionString = ConfigurationSettings.AppSettings["ConnStr"];
            myConn.Open();
            string strsql = "select GName,GPassword from [GLY] where GName=' + NameTextBox.Text'" ;
            OleDbCommand cmd = new OleDbCommand(strsql, myConn);
            OleDbDataReader dr;
            dr = cmd.ExecuteReader();
            if (dr.Read())
            {
                if (dr.GetValue(0).ToString ()==NameTextBox.Text)
                {
                    if (dr.GetValue(1).ToString() == PasswordText.Text)
                    {
                        Response.Redirect("Default.aspx");

                    }
                }
            }
             myConn.Close();
能连接上但读不出数据，谁知道是怎么回事？

是用C#写的
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