How to pass the HTML path into aspx page

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ASP.NET

Hi In a aspx page i have 4 columns as
customercode:"abc"
locatorid:123
Oldploygoncords: 42.477104,-83.218141
NewPolygoncords:

Save button
In desinger part i have a iframe to display googlemap according to the above oldpolygoncords.If i change the polygon cords (i mean moving cursor) on the google map,i should display with new polygon cords in the above textbox(NewPolygonCords) and click save button to store cords in the database.
Now my Question is...
1) How to pass the HTML path into ASPX page to show a google map.
2) if possible can u give example how to write ? and where to write?

here I have written html file and pass into aspx page..
(response.addheader("Location","gmap.html"),but it doesn't work

Can anyone help me on this...
Thanks a lot.