//乘法表
            string str;
            Label1.Text = "";
            for (int num = 1; num <= 9; num++)
            {
                for (int j = 1; j <= num; j++)
                {
                    str = Convert.ToString(num) + "*" + Convert.ToString(j) + "=" + Convert.ToString(num * j) + "  ";
                    Label1.Text += str;
                }
                Label1.Text += "<br>";
            }
            //口诀表
            int chengji;
            string[] number = new string[81]{ "一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二", "十三", "十四", "十五", "十六", "十七", "十八", "十九", "二十", "二十一", "二十二", "二十三", "二十四", "二十五", "二十六", "二十七", "二十八", "二十九", "三十", "三十一", "三十二", "三十三", "三十四", "三十五", "三十六", "三十七", "三十八", "三十九","四十","四十一","四十二","四十三","四十四","四十五","四十六","四十七","四十八","四十九","五十","五十一","五十二","五十三","五十四","五十五","五十六","五十七","五十八","五十九","六十","六十一","六十二","六十三","六十四","六十五","六十六","六十七","六十八","六十九","七十","七十一","七十二","七十三","七十四","七十五","七十六","七十七","七十八","七十九","八十","八十一"};
            for (int num1 = 1; num1 <=9; num1++)
            {
                for (int i =1; i <=num1; i++)
                {
                    chengji = num1 * i;
                    str = number[i-1] + number[num1-1] + "得" + number[chengji-1] + "&nbsp;&nbsp";
                    Label2.Text += str;
               }
               Label2.Text += "<br>";
            }


  string str = "";//字符串保存所有输出
        for (int num = 1; num <= 9; num++)
        {
            for (int j = 1; j <= num; j++)
            {
                int date1 = j;//第1个数字
                string flag = "x";//乘号
                int date2 = num;//第2个数字
                string equal = "=";//等号
                int result = j * num;//计算结果
                string space = " ";//空格
                str = str + date1 + flag + date2 + equal + result + space;//字符串拼接。
            }
            str = str + "<br/>";//拼接换行字符串
        }

        Label1.Text = str;
信息来源[url]http://www.gobenetzsfcp.cn[/url]