problem in email body

Hi ,
 I want to send email message to many users by one button click, i succeeded in sending email itself ,
My Problem is that i want the body of each message to be a value from  a gridview  associated with each email address in each row
for  more clarification , suppose that this is the gridview results
UserId         HisEmail                               Value_I_Want_To_Be_MessageBody
   1             User1@yahoo.com                    DataOfUser1
    2       & ...