Slow Data Access in web services

Hi First thing you should not pass 30,000 records in a dataset to passover to client due net work load.It severly affects your system performance if network is slow..or packages lost.. So chop your data and send 10000 records at time.... make three to four webservices call..that will be bring 10000 records at time...and u can add this records in a single data set and attach to datagrid in your client machine. use application level,client level caching to avoid loading your web services.. if you have any question you can send email to [email protected] all the best ramesh