Forms :: Image Path Save In Database And Image Name As Design Number?

I create a simple table for image

CREATE TABLE image_table (
Design_no varchar2(10),
filename VARCHAR2(255) PRIMARY KEY,
image LONG RAW);

Then i create simple block of image_table

its show me in this website [URL] My question is i don't want to give my form path always.i want to save my picture path in my database and the name of my picture always same as my design_no column.

For example i want to save a picture in my database i will copy my picture in d:shahzaib1234.jpg now i want the path d:shahzaib save in database and when i copy my picture which path= d:shahzaib and file name = Design no its will automatically save in database.