用DataFormatString格式化GridView

在GridView里面显示数据,要显示的数据有好多位小数,就想让它只显示两位小数,在delphi里,直接用DisplayFormat就行了,在.net中,使用DataFormatString是可以实现这个功能的,但是怎么设置就不起作用,最后发现,由于2.0出于安全性的考虑,还要同时设置HtmlEncode = false,才能够使DataFormatString生效. 
其常用的数值格式如下表所示：
格式字符串         输入                        结果
"{0:C}"            12345.6789              $12,345.68
"{0:C}"            -12345.6789             ($12,345.68)
"{0:D}"            12345                      12345
"{0:D8}"           12345                      00012345
"{0:E}"             12345.6789              1234568E+004
"{0:E10}"          12345.6789              1.2345678900E+004
"{0:F}"             12345.6789              12345.68
"{0:F0}"           12345.6789               12346
"{0:G}"             12345.6789              12345.6789
"{0:G7}"           123456789               1.234568E8
"{0:N}"             12345.6789              12,345.68
"{0:N4}"           123456789                123,456,789.0000
"Total: {0:C}"    12345.6789               Total: $12345.68
常用的日期时间格式：
格式                  说明                       输出格式
d                      精简日期格式           MM/dd/yyyy
D                      详细日期格式           dddd, MMMM dd, yyyy
f                       完整格式                (long date + short time) dddd, MMMM dd, yyyy HH:mm
F                       完整日期时间格式     (long date + long time) dddd, MMMM dd, yyyy HH:mm:ss
g                       一般格式                (short date + short time) MM/dd/yyyy HH:mm
G                       一般格式                (short date + long time) MM/dd/yyyy HH:mm:ss
m,M                   月日格式                 MMMM dd
s                       适中日期时间格式       yyyy-MM-dd HH:mm:ss
t                       精简时间格式             HH:mm
T                      详细时间格式              HH:mm:ss