SqlConnection objConnection = new SqlConnection(ConfigurationSettings.AppSettings["dns"]);
            objConnection.Open();
            string strsql = "select * from table";
            SqlCommand cmd = new SqlCommand(strsql, objConnection);
            SqlDataReader rd = cmd.ExecuteReader();
            if (rd.HasRows)
            {
                
            }
            else
            {
                Response.Write("没有结果");
            }我现在是通过上面得方式来判断是否有结果,然后显示出内容,我现在想简化下程序,变成
            SqlConnection objConnection = new SqlConnection(ConfigurationSettings.AppSettings["dns"]);
            objConnection.Open();
            string strsql = "select * from table";
            SqlCommand cmd = new SqlCommand(strsql, objConnection);
            SqlDataReader rd = cmd.ExecuteReader();
            if (如果没有结果的话)
            {
                 Response.Write("没有结果");
            }请问,这里的如果没有结果的话,这样的条件该怎么写呢?谢谢