need help in writing arraylist on a .txt file

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this is my code

FileStream ftoken = new FileStream("c:\\Tokens.txt",FileMode.Create);
ftoken.Close();
Regex re = new Regex(@"([\.\=\(\)\ \'])", RegexOptions.IgnorePatternWhitespace);
string classPart = " ";
ArrayList tokenArray = new ArrayList();
StreamWriter write = new StreamWriter("c:\\Tokens.txt");
for (int i = 0; i < richTextBox1.Lines.Length; i++)
{
     string[] splitString = re.Split(richTextBox1.Lines[i]);
     foreach(string s in splitString)
     {
           string token = classPart + " " + s + " " + (i + 1).ToString();
           tokenArray.Add(token);
     }
}
     foreach (object line in tokenArray)
     {
          write.WriteLine(line);
     }

i dont get any error but token.txt file has nothing :(

Posted 25-Aug-11 6:17am

Sweety Khan

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2 solutions

Solution 2

In addition to what Rob said: you need to use the using statement:

C#

using (StreamWriter writer = new StreamWriter("my_file_name.txt")) {
    writer.Write("blah blah blah");
    //...
} //at this point, writer.Dispose will be called even if an exception was thrown

You should use this construct for all temporary object implementing the interface System.IDisposable. It is fully equivalent to a try-finally block calling IDisposable.Dispose implemented in the object in the "finally" section of code.
See:
http://msdn.microsoft.com/en-us/library/system.idisposable.aspx[^],
http://msdn.microsoft.com/en-us/library/yh598w02.aspx[^],
http://msdn.microsoft.com/en-us/library/system.io.streamwriter.aspx[^].

—SA

Posted 25-Aug-11 13:45pm

Sergey Alexandrovich Kryukov

Comments

Simon Bang Terkildsen 25-Aug-11 20:15pm

ah yeah, using using is easy to forget when not in the comfortable environment of an IDE :)
+5

Sergey Alexandrovich Kryukov 25-Aug-11 21:31pm

Why not? I have IDE with me, often use to try things before posting.
Thank you, Simon.
--SA

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Rob Philpott · Accepted Answer · 2011-08-25T06:23:00

That's a crazy bit of code! Firstly, you don't need the FileStream at the top to create the file, the StreamWriter will do that for you. Did you put a break point on the WriteLine to check if anything is getting written?

Probably the problem is that you don't close the StreamWriter. It could well be that what you've written is sitting in a buffer and will not get put to disk until you Flush() or Close() the stream.

Also, don't use an ArrayList, that's a thing of the past. Use a List<string>, or better still just do the write rather than use a collection at all.