Get Value From Webservice

Hello , 

i have a webservice that connect to a db 

i need to retrive a value from this webservice 

let's say something like show me id_number from user table the id_number will type in a asp simple textbox and when i click submit button 

(also asp button) the label will show me the result (the result cannot be more then one value) 

i know its simple but i did program for a long long long time LOL 

please help me 

c# asp.net 4.0

webservice name: WebService1

i already ad it as a referance 

Thank You