Browse button on .aspx page

How can I add a browse button to my asp.net page? What I need is a button the user can press that will then let them select the file to upload to the data grid IMAGE_UPLOAD column. Once the the image file is uploaded and the the rest of the rows on webform filled, the user clicks the SAVE button on the WEBFORM to populate the SQL server table with new records. Any suggestion on the image format to use for scalability on SQL server. Thanks!

I am using visual studio.net editor to crate my WebForm. Thanks!

all you need for the Browse Button is an HTML code like this

Filename: <INPUT TYPE="file" NAME="cmdBrowse">

am still confused with the data grid IMAGE_UPLOAD column... hehehe..lol