实例:删除倒数第二个“\\”后的所有字符串
结果:“a:\\aaa\\bbb\\ccc”
string abc = @"a:\\aaa\\bbb\\ccc\\CVS\\";
int b = abc.LastIndexOf(@"\\");
abc = abc.Substring(0, b);
b = abc.LastIndexOf(@"\\");
abc = abc.Substring(0, b);
实例:删除倒数第二个“\\”后的所有字符串
结果:“a:\\aaa\\bbb\\ccc”
string abc = @"a:\\aaa\\bbb\\ccc\\CVS\\";
int b = abc.LastIndexOf(@"\\");
abc = abc.Substring(0, b);
b = abc.LastIndexOf(@"\\");
abc = abc.Substring(0, b);