C#string.Format小记

            //小数点后一位 四舍五入 有
            Console.WriteLine("原数据   :12345.46");
            Console.WriteLine(string.Format("{0:N1}", 12345.46));
            //小数点后两位 四舍五入 有
            Console.WriteLine("原数据   :123.467");
            Console.WriteLine(string.Format("{0:N2}", 123.467));
            //百分比 四舍五入 有
            Console.WriteLine("原数据   :12.46/100.0");
            Console.WriteLine(string.Format("{0:P1}", 12.46/100.0));
            //百分比 四舍五入 有
            Console.WriteLine("原数据   :0.067307");
            Console.WriteLine(string.Format("{0:P3}", 21.0/312.0));
            //千分位
            Console.WriteLine("原数据   :4567890");
            Console.WriteLine(string.Format("{0:#,##0}", 4567890));
            //也可以这样格式化
            Console.WriteLine((21.0/312.0).ToString("#.##"));
            Console.WriteLine((21.245 / 100.0).ToString("#.##"));
            //两位保留
            Console.WriteLine(string.Format("{0:F2}", 22.345));
            //金额输出
            Console.WriteLine(string.Format("{0:C2}", 22.345));
            //金额输出
            Console.WriteLine(string.Format("Total:{0:C}", 1234.5678));
            //参数输出
            Console.WriteLine("dan价：{0}，个数：{1}，zong价:{2}",10,5,50);
            //日期
            Console.WriteLine(string.Format("{0:d}", DateTime.Now));
            //时分秒
            Console.WriteLine(string.Format("{0:T}", DateTime.Now));

            Console.WriteLine(string.Format("{0:R2}", 22.345));