Read several files with streamreader

I know it isn´t really a GH question but I couldn´t find the answer out there and I´m in a little pinch. I´d like to read several files with the Streamreader method in a for loop formatting the string of the paths. The kind of "imported java syntax" doesn´t seem to work:

(C# code)



List <string> list = new List <string> ();



for (int month = 1; month <= 12; month++)

{

StreamReader reader = new StreamReader(String.Format("C:\blablabla\wind_speed_2007_{0}.txt", month));

string line;

while ((line = reader.ReadLine()) != null)

{

list.Add(line); // Add to list.

}

}

A = list;

Anyone can help?

Thanks in advance.

Replies to This Discussion

Permalink Reply by Damien Alomar on December 26, 2009 at 8:02am

Just make multiple stream readers for each file that you want to bring in...



StreamReader stream_1 = new StreamReader ("C:\somewhere\stream1.txt")

//create as many other streams as you want...

StreamReader stream_2 = new StreamReader ("C:\somewhereElse\stream2.txt")

Permalink Reply by Miguel Vidal on December 27, 2009 at 9:37am

Thanks, Damien.

Actually, I have like 60 files to read, so I used loop not to have so many streamreaders. Do you know a way to format the file path?

Permalink Reply by Luis Fraguada on December 27, 2009 at 9:54am

lets say the file names are: stream0.txt, stream1.txt, etc...

you would wrap that in a for loop to create the stream reader...I'd then store that info in an array or something



PSEUDOCODE

Dim pathPre As String

Dim pathSuf As String



pathPre = "C:\somewhere\stream"

pathSuff = ".txt"





For i = 0 to 60 (number of files to read)

Dim path As String



path = pathPre & i & pathSuf

StreamReader stream = new StreamReader (path)

'other code here to extract the read data and store it somewhere

Next

This is not actual code, just what I would think to do in situation where the file name is more or less the same and just changes with a number incrementation...

Permalink Reply by Miguel Vidal on December 28, 2009 at 2:59am

Thanks a lot for your help, Luis.

It´s funny but it only worked, using x & y with the post-it panel as input strings and not directly from the code, as you can see in the image.

Cheers.

Attachments:

streamreader.jpg, 222 KB

Permalink Reply by Luis Fraguada on December 28, 2009 at 5:22am

not sure why it does not work the other way...I do it all the time...and yes usually I would put the prefix and suffix in a panel for more flexibility. GLad it works!

Permalink Reply by Damien Alomar on December 28, 2009 at 7:44am

I guess I misread the question. It seamed as though you wanted several streams with separate access so that you could read a line from one and a line from another.

Permalink Reply by Miguel Vidal on December 28, 2009 at 2:19pm

There´s no problem, Damien. Thanks anyway.

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