If your want to show Image from Folder Then store the image in Folder and store image name in database
And use following code to show the image
<asp:Image Width="300px" Height="200px" ID="Image1" ImageUrl='<%# Eval("ImageName", , "~/ProductImages/{0}" runat="server" />
EVal("ImageName" is a Column name of Table
And ~/ProductImages is a folder name in your website