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PSahuPSahu 

How to autopopulate the Form value in visual force page?

suppose this is my  vf page https://c.ap2.visual.force.com/apex/multi_weather and in want to autopopulate the Form value i.e when the page is load the one read that i was insert in it before the record value is autopopulated in it without passing id in the url.
i am new in apex and visual form my aim is to make a setting page in which the page accept values at first time and when the second time user go to the url https://c.ap2.visual.force.com/apex/multi_weather the saved value will be autopopulated

Thanks