Question

C# 得到特定字符后面的所有字符串

例 “afaffgjk/ga/ag/dd.pdf” 得到pdf

Answer 1

string tmp="afaffgjk/ga/ag/dd.pdf";
string fileSuf = tmp.substring(tmp.LastIndexOf(".") + 1);

Answer 2

string str = "afaffgkl/ss/ss/ss.pdf";
string[] ary = str.split('.');
ary[1]就是pdf

Answer 3

string a = "afaffgjk/ga/ag/dd.pdf";
string[] aa = a.Split('.');
textBox1.Text = aa[1];