C# 0 The Complete Reference

PART I

C h a p t e r   1 4 :  

U s i n g   I / O  

391

PART IPART I

    catch(IOException exc) {

      Console.WriteLine("Cannot Open File");

      Console.WriteLine(exc.Message);

      return ;

    }

    // Write the alphabet.

    for(int i=0; i < 26; i++) {

      try {

        f.WriteByte((byte)('A'+i));

      }

      catch(IOException exc) {

        Console.WriteLine("Error Writing File");

        Console.WriteLine(exc.Message);

        f.Close();

        return ;

      }

    }

    try {

      // Now, read back specific values.

      f.Seek(0, SeekOrigin.Begin); // seek to first byte

      ch = (char) f.ReadByte();

      Console.WriteLine("First value is " + ch);

      f.Seek(1, SeekOrigin.Begin); // seek to second byte

      ch = (char) f.ReadByte();

      Console.WriteLine("Second value is " + ch);

      f.Seek(4, SeekOrigin.Begin); // seek to 5th byte

      ch = (char) f.ReadByte();

      Console.WriteLine("Fifth value is " + ch);

      Console.WriteLine();

      // Now, read every other value.

      Console.WriteLine("Here is every other value: ");

      for(int i=0; i < 26; i += 2) {

        f.Seek(i, SeekOrigin.Begin); // seek to ith character

        ch = (char) f.ReadByte();

        Console.Write(ch + " ");

      }

    }

    catch(IOException exc) {

      Console.WriteLine("Error Reading or Seeking");

      Console.WriteLine(exc.Message);

    }

    Console.WriteLine();

    f.Close();

  }

}

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392

 

P a r t   I :  

T h e   C #   L a n g u a g e

The output from the program is shown here:

First value is A

Second value is B

Fifth value is E

Here is every other value:

A C E G I K M O Q S U W Y

Although