How to connect Crystal Report to database ASP.Net

hi,

in my web Application, i have set the Connection String in Class as Follows :

public

class

clsConnection

{

publicSqlConnection con = newSqlConnection(@"server=desire5\SQLEXPRESS;uid=sa;pwd=desire;database=DesireSchool ;"

);

}

Now i want to use this Connection String  for Crystal Report,

i have tried by using Object of this class

Please Tell me How can i Use this Connection String For Crystal Report .

Thanks in Advance