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Building a Hashtable of File Contents from a Zip File Containing Multiple Files and Folders

/ Published in: C#
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  1. public static Hashtable BuildFileTable(Stream s)
  2.         {
  3.             Hashtable retVal = new Hashtable();
  4.             ZipInputStream zips = new ZipInputStream(s);
  5.             ZipEntry ze = zips.GetNextEntry();
  6.             while (ze != null)
  7.             {
  8.                 if (ze.IsFile)
  9.                 {
  10.                     retVal.Add(ze.Name, GetContentFromZipEntry(ze, zips));
  11.                 }
  12.                 ze = zips.GetNextEntry();
  13.             }
  14.             return retVal;
  15.         }
  16.  
  17.         public static string GetContentFromZipEntry(ZipEntry ze, ZipInputStream zips)
  18.         {
  19.             string retVal = string.Empty;
  20.             if (ze.Offset > int.MaxValue || ze.Size > int.MaxValue)
  21.             {
  22.                 throw new ApplicationException("Files larger than 4gb not supported.");
  23.             }
  24.             Byte[] buffer = new byte[ze.Size];
  25.             int numRead = zips.Read(buffer, Convert.ToInt32(ze.Offset), buffer.Length);
  26.             MemoryStream ms = new MemoryStream(buffer);
  27.             StreamReader sr = new StreamReader(ms);
  28.             retVal = sr.ReadToEnd().Trim();
  29.  
  30.             return retVal;
  31.         }

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