Yes, thank you for your reply me ......... but i don't know how can i do (can add a new report to an existing .NET application, as a strongly-typed report)

You mean i should go to .net application, right click solution explorer > add > new item >reporting > report ?
then will create the *.rdlc file,but i try this report page, i think so simple compare the crystal report ........
i can't see the set formula fields object in toolbox not like crystal report powerful