根据绑定的值的不同改变gridview里某一单元格的字体或背景颜色

<ItemTemplate>
      <span style=' <%# "color:" + (Eval("yourField").ToString() == "1" ? "black" : (Eval("yourField").ToString() == "2") ? "green" : "red" ) %> '> <%# Eval("xxx") %> </span>
    </ItemTemplate>