How to stop textchanged event from firing

Hi,

I am calculating discount at text changed event when user enters the discount%. To edit when i load the data from table using dataset i do not get the correct data as it is in the database. For ex if quantity is saved as 5000.00 in table and when i try to fetch it.. I am getting it as 500000. Instead of 5000.00. Is it because of text changed event? How do i resolve this?