[转]C#中string.Format()方法

代码：

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        enum Color { Yellow = 1, Blue, Green };
        static DateTime thisDate = DateTime.Now;
        static void Main(string[] args)
        {
            string s = "";
            Console.Clear();
            Console.WriteLine("StandardNumeric Format Specifiers");
            s = String.Format(
            "(C)Currency: . . . . . . . . {0:C}\n" +
            "(D)Decimal:. . . . . . . . . {0:D}\n" +
            "(E)Scientific: . . . . . . . {1:E}\n" +
            "(F)Fixed point:. . . . . . . {1:F}\n" +
            "(G)General:. . . . . . . . . {0:G}\n" +
            " (default):.. . . . . . . {0} (default = 'G')\n" +
            "(N)Number: . . . . . . . . . {0:N}\n" +
            "(P)Percent:. . . . . . . . . {1:P}\n" +
            "(R)Round-trip: . . . . . . . {1:R}\n" +
            "(X)Hexadecimal:. . . . . . . {0:X}\n",
            -123, -123.45f);

            Console.WriteLine(s);

            Console.WriteLine("StandardDateTime Format Specifiers");
            s = String.Format(
            "(d)Short date: . . . . . . . {0:d}\n" +
            "(D)Long date:. . . . . . . . {0:D}\n" +
            "(t)Short time: . . . . . . . {0:t}\n" +
            "(T)Long time:. . . . . . . . {0:T}\n" +
            "(f)Full date/short time: . . {0:f}\n" +
            "(F)Full date/long time:. . . {0:F}\n" +
            "(g)General date/short time:. {0:g}\n" +
            "(G)General date/long time: . {0:G}\n" +
            " (default):.. . . . . . . {0} (default = 'G')\n" +
            "(M)Month:. . . . . . . . . . {0:M}\n" +
            "(R)RFC1123:. . . . . . . . . {0:R}\n" +
            "(s)Sortable: . . . . . . . . {0:s}\n" +
            "(u)Universal sortable: . . . {0:u} (invariant)\n" +
            "(U)Universal sortable: . . . {0:U}\n" +
            "(Y)Year: . . . . . . . . . . {0:Y}\n",
            thisDate);
            Console.WriteLine(s);
            Console.WriteLine("StandardEnumeration Format Specifiers");
            s = String.Format(
            "(G)General:. . . . . . . . . {0:G}\n" +
            " (default):.. . . . . . . {0} (default = 'G')\n" +
            "(F)Flags:. . . . . . . . . . {0:F} (flags or integer)\n" +
            "(D)Decimal number: . . . . . {0:D}\n" +
            "(X)Hexadecimal:. . . . . . . {0:X}\n",
            Color.Green);
            Console.WriteLine(s);
            Console.ReadLine();
        }
    }
}

结果：