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Categories / C# Tutorial / File Directory Stream

 

Use MemoryStream to reverse a file

using System; using System.IO; class Class1 {     [STAThread]     static void Main(string[] args)     {         FileStream fsSrc = File.OpenRead("s.txt");         BinaryReader rdr = new BinaryReader(fsSrc);         FileStream fsDest = File.Open("d.txt", FileMode.Create);         MemoryStream memStream = new MemoryStream();         int curChar = 0;         while ((curChar = rdr.Read()) != -1)         {             memStream.WriteByte(Convert.ToByte(curChar));         }         for (int i = 0; i < memStream.Length / 2; ++i)         {             byte tempTop, tempBottom;             memStream.Seek(i, SeekOrigin.Begin);             tempTop = (byte)memStream.ReadByte();             memStream.Seek(-i - 1, SeekOrigin.End);             tempBottom = (byte)memStream.ReadByte();             memStream.Seek(-1, SeekOrigin.Current);             memStream.WriteByte(tempTop);             memStream.Seek(i, SeekOrigin.Begin);             memStream.WriteByte(tempBottom);         }         memStream.Seek(0, SeekOrigin.Begin);         byte[] memBytes = memStream.ToArray();         BinaryWriter bw = new BinaryWriter(fsDest);         bw.Write(memBytes);         bw.Close();         rdr.Close();     } }