字符数组通过指定字符分割整个字符串

        string PF = txt_Ex.Text.Trim();//获取字符串
        string[] splits = PF.Split(new string[] { "*" }, StringSplitOptions.RemoveEmptyEntries);//截取字符串【0】品番【1】颗数【2】设变//以* 分割获得的字符串