streamreader 'stalls' when sharing a file

Question

5.00/5 (1 vote)

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Here is the case:

A text file created by a 3th party app. The other app is actively appending at that moment in time. It does so in batches every 1 min or so.
I can open the text file with notepad and see all the data in there.
If I try to modify it, notepad will not allow me to save it. Normal I would say.

Now I access the same file with the code below.

<br />
string line;<br />
sr = new StreamReader("TestFile.txt");<br />
line = sr.ReadLine();<br />
MessageBox.Show(line); <br />

I get no exceptions, but the messagebox only pops up after I close the 3th party app. :confused:
I seems that my app sort of stalls at the readline. How to get around this?
I want it to continue so I can read the whole file. Should be possible since notepad can.

Posted 1-Mar-11 20:12pm

Vincent Beek

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Venkatesh Mookkan · Answer 1 · 2011-03-01T20:28:00

Solution 1

I guess, you are trying to opening the file while in use.

Try the below block. May be it help.

C#

FileStream fs = new FileStream("TestFile.txt", FileMode.Open, FileAccess.Read);
using (StreamReader reader = new StreamReader(fs))
{
    MessageBox.Show(reader.ReadLine());
}

Mark it as Answer if it is helpful.

Posted 1-Mar-11 20:28pm

Venkatesh Mookkan

Updated 1-Mar-11 20:29pm

v2

Comments

Vincent Beek 2-Mar-11 3:05am

thx. I will be able to try your advise later today.

Vincent Beek 2-Mar-11 11:49am

I am afraid that i get the same result.

messagebox only pops up after i close the 3th party application

Venkatesh Mookkan 2-Mar-11 11:52am

Only reason I could see is, the 3rd party application is locking the file writing or reading. But have no idea why it is opening in notepad.

Vincent Beek 2-Mar-11 12:56pm

I dont know iether. Thanks for the help anyway

Venkatesh Mookkan 2-Mar-11 21:08pm

Down-voted! For what? Answering your question. Thanks buddy.

Vincent Beek 3-Mar-11 3:14am

sorry, misunderstood something here. Thought it was related to 'if the solution worked or not'
I appriciate your help!
I think I fixed the vote on this topic now.