C#获取字符串中某字符或字符串出现的次数或个数
/// <summary> /// 字符串中含有多少个字符 /// </summary> /// <param name="s">被寻找字符串</param> /// <param name="str">待寻找字符串</param> /// <returns>整形(个数)</returns> private int StrHowMuch(string Str_s, string Str_str) { if (!Str_s.Contains(Str_str) || Str_str=="") return 0; int Str_i = 0; int Str_t=0; for (int Str_j = 0; Str_j < Str_s.Length; Str_j++) { Str_t = Str_s.IndexOf(Str_str, Str_j);//0开始 if (Str_t != -1) { Str_i++; Str_j = Str_t - 1 + Str_str.Length; } } return Str_i; }
int i=StrHowMuch("abcdefgabc","a");//运行结果为 2