The Column contains a Header facet, and inside of this is an Output Text tag that is used to label the column. Column包含了一个Headerfacet,其中是用于给列贴上标签的OutputText标记。
Use the top row for a header; insert a Label control whose label is subject. 使用顶行作为标头;插入Label控件,该控件的标签是subject。