netch/Netch/Utils/Bandwidth.cs

namespace Netch.Utils
{
    public static class Bandwidth
    {
        /// <summary>
		///     计算流量
		/// </summary>
		/// <param name="bandwidth">流量</param>
		/// <returns>带单位的流量字符串</returns>
		public static string Compute(long bandwidth)
        {
            string[] units = { "KB", "MB", "GB", "TB", "PB" };
            double result = bandwidth;
            var i = -1;

            do
            {
                i++;
            } while ((result /= 1024) > 1024);

            return System.String.Format("{0} {1}", System.Math.Round(result, 2), units[i]);
        }
    }
}