How to load data from SQL by using VB ASP.Net?

Currently i'm developing a web system which is based on the Google map
for my school project. I have to build it using the ASP.Net in VB
language. In this system, i need to retrieve the latlng value of
marker and route(polyline) from SQL database and able to add, delete
and update those data later on. Currently i'm able to show all the
marker and routes on the map well by using XML. However, i dunno how
to retrieve the data from SQL database and show it on the map since
the map API is run on client side and the retrieving of data is on the
server side. Can anyone show me or tell me how to solve it?

p.s: Sorry for my broken English and i'm not sure whether i post this
question in the right category.

~ Darrell

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