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converting bytes to an appropriate file size description

/ Published in: C#
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  1. namespace Kyrathasoft.Conversions.GetFilesizeDescription {
  2.  
  3.     using System;
  4.  
  5.     public static class clsGetFilesizeDescription {
  6.  
  7.         public static string getFilesizeDesc(double sizeInBytes) {
  8.  
  9.             const double Terabyte = 1099511627776;
  10.             const double Gigabyte = 1073741824;
  11.             const double Megabyte = 1048576;
  12.             const double Kilobyte = 1024;
  13.  
  14.             string result = string.Empty;
  15.             double the_size = 0;
  16.             string units = string.Empty;
  17.  
  18.             if (sizeInBytes >= Terabyte) {
  19.                 the_size = sizeInBytes / Terabyte;
  20.                 units = " Tb";
  21.             }
  22.             else {
  23.                 if (sizeInBytes >= Gigabyte) {
  24.                     the_size = sizeInBytes / Gigabyte;
  25.                     units = " Gb";
  26.                 }
  27.                 else {
  28.                     if (sizeInBytes >= Megabyte) {
  29.                         the_size = sizeInBytes / Megabyte;
  30.                         units = " Mb";
  31.                     }
  32.                     else {
  33.                         if (sizeInBytes >= Kilobyte) {
  34.                             the_size = sizeInBytes / Kilobyte;
  35.                             units = " Kb";
  36.                         }
  37.                         else {
  38.                             the_size = sizeInBytes;
  39.                             units = " bytes";
  40.                         }
  41.                     }
  42.                 }
  43.             }
  44.  
  45.             if (units != "bytes") {
  46.                 result = the_size.ToString("N3") + " " + units;
  47.             }
  48.             else {
  49.                 result = the_size.ToString() + " " + units;
  50.             }
  51.             return result;
  52.         }
  53.  
  54.     }
  55. }

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