1. string.IsNullOrEmpty(X): 判断是否为空字符
2. IsNullOrWhiteSpace(x):判断是否为空字符或空格字符
3. Timespan: 表示两个时间之差,
datetime dt1 = "2014/8/3 10:00:00".toDateTime(DateTime.MinValue);
datetime dt2 = DateTime.Now;
TimeSpan ts =dt2-dt1;
4. indexof("x");
string str = "xabcdsx";
int i = str.IndexOf("x"); //结果为0
5. string x = "babbbxxx";
string y = x.substring(0,5) ;//结果为babbb
20140803 .net学习
时间: 2024-10-25 13:49:00