I recently had to make a dropdownlist populated with fonts. Luckily, .NET allows you to use the installed fonts very easy.

First, add a drowdownlist to your ASP.NET page like this:

<asp:DropDownList runat="Server" id="ddlFonts" />

Then call this method to do the actual databinding of the fonts:

private void BindFonts()
   System.Drawing.Text.InstalledFontCollection col = new System.Drawing.Text.InstalledFontCollection();
   foreach (System.Drawing.FontFamily family in col.Families)

That's all there is to it. Be aware that the fonts are the ones installed on the server hosting your web page.