C#???????????????
???????????? ???????[ 2016/4/1 10:53:45 ] ????????????? .NET
???????????????C#?У?string?????????????????????????????
????1??String str1=""???????????????????????????????洢????????????????????
????2??String str2=String.Empty?????????????????????????????????????????棬?????1?е?????
????3??String str3=null?????????????????????????????κε?????δ????????洢???????????????????????????????
?????????string????????????????????????????ж????????????????????????
???????????string????????a??????????????ж????????????????????? a == "" a == String.Empty
????a.length == 0 ?????????????????ж??Ч???? 3 > 2 > 1?????a.length == 0 > a == String.Empty > a == ""??
?????????????????????????????String.Empty??NULL?????????Empty????????????ж???????????length??
??????????????????????????String.IsNullOrEmpty(“XX”)??????Ч????????????????????????????д??????????????
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11