//前台有个familyList(DropDownList控件）
for(int i=0;i<FontFamily.Families.Length;i++)
{
  familyList.Items.Add(FontFamily.Families[i].Name);
}

InstalledFontCollection ifc=new InstalledFontCollection();
foreach(FontFamily ff in ifc.Families)
{
 familyList2.Items.Add(ff.Name);
}

//System.Drawing.KnownColor
string[] colors=Enum.GetNames(typeof(System.Drawing.KnownColor);
foreach(string color in colors)
{ 
 ListItem list=new ListItem(color);
 list.Attributes.Add("style","color:"+color);
 colorList.Items.Add(list);
}

//System.Web.UI.WebControls.FontSize
string[] sizes=Enum.GetName(typeof(System.Web.UI.WebControls.FontSize));
foreach(string size in sizes)
{
 sizeList.Items.Add(size);
}