Solved

Detect end of file

Posted on 2011-09-24
4
271 Views
Last Modified: 2012-05-12
I currently have:
try
{
  for (; ; )
  {
    y = r.ReadByte();
  }
}
catch (EndOfStreamException)
{
  //end of file
}

Open in new window

Is there a better way? I feel I shouldn't be using catch for an expected exception.
0
Comment
Question by:deleyd
  • 2
4 Comments
 
LVL 40

Accepted Solution

by:
Jacques Bourgeois (James Burger) earned 334 total points
ID: 36592916
r looks like a BinaryReader. Could we see the call to its constructor so that we can know what is the underlying stream? Some streams, such as the FileStream, have a marker for the end of the stream. You could be able to catch the condition through the BaseStream.
0
 

Author Comment

by:deleyd
ID: 36593733
using (FileStream fs = new FileStream(fn, FileMode.Open, FileAccess.Read))
{
  using (BinaryReader r = new BinaryReader(fs))
  {
    try
    {
      for (; ; )
      {
        y = r.ReadByte();
      }
    }
    catch (EndOfStreamException)
    {
      //end of file
    }

Open in new window

0
 
LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 166 total points
ID: 36593992
How about modding line 7 to be:

for ( ; fs.Position < fs.Length; )

Open in new window

0
 
LVL 40

Assisted Solution

by:Jacques Bourgeois (James Burger)
Jacques Bourgeois (James Burger) earned 334 total points
ID: 36594089
As I expected. You cannot know where the cursor is in the BinaryStream itself, but you can in the underlying FileStream.

     while (! (fs.Position==fs.Length))
      {
        y = r.ReadByte();
      }

Open in new window


You might have to adjust fs.Length plus 1 or minus 1, I do not remember if Position starts at index 0 or 1.
                        {}
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Wouldn’t it be nice if you could test whether an element is contained in an array by using a Contains method just like the one available on List objects? Wouldn’t it be good if you could write code like this? (CODE) In .NET 3.5, this is possible…
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

827 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question