刚写的 一个数字转中文的小函数，比较常用，自己用~~

一共仨控件： mNum mTxt1 mTxt2 这个 button就不算在里了。。

        private void button1_Click(object sender, EventArgs e)
        {
            string m = this.mTxt1.Text.ToString();
            int n = Convert.ToInt32(this.mNum.Text.ToString());
            for (int i = 0; i <= n; i++)
            {
                m = m.Replace("第" + i + "位", "第" + retNum(i.ToString()) + "位");
            }

            this.mTxt2.Text = m;
        }

        public string retNum(string n)
        {
            if (n.Length == 2)
            {
                string n1 = n.Substring(0, 1);
                string n2 = n.Substring(1, 1);
                if (n1 == "1")
                {
                    n1 = "";
                }
                if (n2 == "0")
                {
                    n2 = "";
                }
                return retOneNum(n1) + "十" + retOneNum(n2);

            }
            else
            {
                return retOneNum(n);
            }
        }

        public string retOneNum(string n)
        {
            string k = n;

            k = k.Replace("1", "一");
            k = k.Replace("2", "二");
            k = k.Replace("3", "三");
            k = k.Replace("4", "四");
            k = k.Replace("5", "五");
            k = k.Replace("6", "六");
            k = k.Replace("7", "七");
            k = k.Replace("8", "八");
            k = k.Replace("9", "九");
            k = k.Replace("0", "零");

            return k;
        }