How To Display A Loged In User's Profile From Database

 after i login, i should be able to see the login person's profile, and edit it. anyone know how to do this?
currently i am using grid view to display the profile, and created a store procedure in database
 
ALTER PROCEDURE [dbo].[select_customer_by_login]
    -- Add the parameters for the stored procedure here
(
@Username nvarchar(50)
)
AS
    SELECT C.CustomerName, C.TFN, C.Address, C.City, C.State, C.PostCode, C.Phone
    From dbo.Login L, dbo.Customer C
    Where L.CustomerID = C.CustomerID and L.UserID=@Username;
 
@Username is the login account when people login.
 
the error output is Procedure or Function 'select_customer_by_login' expects parameter
'@Username', which was not supplied.