access value from page

Hi,

     I want to know some logic.suppose that i have three page page1.aspx,page2.aspx,page3.aspx
     page1 have some control and next button
     page2 have some control and next button
     page3 have some control and save button

     how can i access page1 and page2 controls value on page3 so that when i click the save button then value of all controls of page1,page2,page3 insert   

     into database in one time?

 Thanks
Sachin Kulshrestha
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