Windows Forms

Re: Reading data from a text file into an array one line at a time

28-Apr-08 14:16

Im implementing a currency converter into an application of mine. The data i need to read from is stored in the file CurrRates.txt and is comma delimited. I am trying to set it up so that I open the file, read each line and send that line to an array, then read the next line etc, then closes the file.

As I am trying to learn all this ive spent ages looking for what is necessary, and so far all I have determined is that it usese FileStream. Ive spent along time trying to implement it but my knowledge is limited as, like i said, im still learning.

Any help would be appreciated.

Christian Graus28-Apr-08 14:29

Re: Reading data from a text file into an array one line at a time

28-Apr-08 14:29

File.ReadAllLines will do what you want.

Grubious28-Apr-08 15:22

Re: Reading data from a text file into an array one line at a time

28-Apr-08 15:22

Heres what I have so far:

private void importRates()
{

string[] line;
System.IO.FileStream fStream = new FileStream("C:\\UserData\\Rossulator\\CurrRates.txt", FileMode.Open);

while (fStream != null)
{
// add line to array
}
}

I tried File.ReadAllLines and I either didn't understand or didn't put it in the right place...probably both.

Grubious28-Apr-08 15:30

Re: Reading data from a text file into an array one line at a time

28-Apr-08 15:30

Okay let me rephrase my question cos im not making sense.

I originaly had:

private void importRates()
{
rates[0, 0] = 0.010289;
rates[0, 1] = 97.1907;
rates[1, 0] = 1.07181;
rates[1, 1] = 0.933001;
rates[2, 0] = 1.67566;
// etc to rates[19, 1] = 0.026708;
}

and everything was working fine. I did this so i could learn how to do it, but also to make sure i had the rest of my code working, which i do. The next step is to take all that rates[19, 1] = 0.026708; stuff, and put it into an external file. I want to read in that file, take each line into an array, and use that instead of having a massive list of information which is very difficult to update regularly.

I hope this clears things up a bit.

Christian Graus28-Apr-08 18:01

Re: Reading data from a text file into an array one line at a time

28-Apr-08 18:01

System.IO.File.ReadAllLines(filename)

will read an entire file line by line into a string array.

Grubious28-Apr-08 19:57

Re: Reading data from a text file into an array one line at a time

28-Apr-08 19:57

Thanks for your help, finally got it, even though i ended up using ReadLine();. The only reason i looked around for something else was because intelli-sense wasn't showing it as an option :/. Anyway, thought id post my final code, just cos.

private void importRates(){

string path = Settings.Default.FileName;
if (!File.Exists(path))
{
MessageBox.Show("no file found at " + path);
return;
}
int lineCount = 0;
StreamReader sr = new StreamReader(path);
{
String line;
while ((line = sr.ReadLine()) != null)
{
string[] ToFrom = line.Split(',') ;
rates[lineCount, 0] = double.Parse(ToFrom[0]);
rates[lineCount, 1] = double.Parse(ToFrom[1]);
lineCount++;
}
sr.Close();
}
}

Spacix One29-Apr-08 4:47

Spacix One

29-Apr-08 4:47

File.ReadAlllLines is the better option IF you are doing this on the standard framework and not the compact framework, because the compact framework doesn't contain this method.

If you are on the compact framework the above code isn't a good implementation of the StreamReader object, you should use a tryf statement or the simplier method of a using statement to the StreamReader object to finalize after execution.

Below is better (with the using statement) though you might want to check for End of File and other sorts also (which have not been added by me) Wink | ;)

private void importRates()
{
    string path = Settings.Default.FileName;
    if (!File.Exists(path))
    {
        MessageBox.Show("no file found at " + path);
        return;
    }
    int lineCount = 0;
    using (StreamReader sr = new StreamReader(path))
    {
        String line;
        while ((line = sr.ReadLine()) != null)
        {
            string[] ToFrom = line.Split(',');
            rates[lineCount, 0] = double.Parse(ToFrom[0]);
            rates[lineCount, 1] = double.Parse(ToFrom[1]);
            lineCount++;
        }
        sr.Close();
    }
}

-Spacix
All your skynet questions[^] belong to solved

Skins for Windows Forms

Member 391904927-Apr-08 19:03

27-Apr-08 19:03

I am looking for some good quality skins for a Windows Forms project.

The software is going to be a Winforms app that will be used in conjunction with iTunes/iPhone so I would like the GUI to look more polished than a plain vanilla out-of-the box Winforms app.

What in your opinion are the best free skins currently available?

Christian Graus27-Apr-08 21:12

27-Apr-08 21:12

Your basic problem is that winforms do not support skinning without some library to do it for you.

Does the iPhone even run .NET ? I'd be astounded if it did.

originSH28-Apr-08 0:53

originSH

28-Apr-08 0:53

I've seen some demos of running Mono on the iPhone Smile | :)

N a v a n e e t h28-Apr-08 1:07

N a v a n e e t h

28-Apr-08 1:07

originSH wrote:
I've seen some demos of running Mono on the iPhone

DevExpress has very good skins. It allows you to create office 2007 style GUI and many more skins. But I think it won't work with MONO as they will be using many P-Invoke calls to change the default look & feel.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

How to use google | Ask smart questions

Member 391904928-Apr-08 9:53

28-Apr-08 9:53

No - This app is not designed to run on the iPhone. The app is designed to run on a PC but it will sync some data with iTunes/iPhone.

I just don't want the app to look like it was written in 2001.

Pete O'Hanlon28-Apr-08 10:03

Pete O'Hanlon

28-Apr-08 10:03

Member 3919049 wrote:
I just don't want the app to look like it was written in 2001.

*cough* W *cough* P *cough* F.

Deja View - the feeling that you've seen this post before.

My blog | My articles

Member 391904928-Apr-08 12:16

28-Apr-08 12:16

That's funny. I will probably write the next version of the app in WPF but for now the app is written in Winforms and I would like to get it out to production as soon as possible.

Do you know of a skin that I can use to give it a look to the effect of a scaled down Windows Media Player?

How to implement a 30-day expiration / key-based registration for software

Spacix One29-Apr-08 4:57

Spacix One

29-Apr-08 4:57

Or you could just use graphics and shapes to draw the form...
Fun Examples From: http://homepage.ntlworld.com/mdaudi100/alternate/misc.html#image2[^] from "Mick Dohertys site"

-Spacix
All your skynet questions[^] belong to solved

Member 391904927-Apr-08 18:49

Re: How to implement a 30-day expiration / key-based registration for software

27-Apr-08 18:49

I am currently developing software that I am planning on selling.

I have created a Setup Project in .NET to install the software to a user's computer.

However, I need to implement logic that provides a 30-day free trial. The software should expire after 30 days unless the user purchases a key.

Can someone here give me some guidance on how I can implement this?

Christian Graus27-Apr-08 21:11

Re: How to implement a 30-day expiration / key-based registration for software

27-Apr-08 21:11

The easiest way is to check the date your file was created, and check if it was 30 days ago. Another way is to write something somewhere that stores the date first run, and check if it was 30 days ago.

Member 391904928-Apr-08 9:56

Re: How to implement a 30-day expiration / key-based registration for software

28-Apr-08 9:56

I'm not sure if checking the date the file was created will work.

If the validation was based on the file create date then couldn't the user simply uninstall the existing app and then reinstall it?

When you say "write something somewhere that stores the date first run, and check if it was 30 days ago" are you suggesting that I write to the registry or some other file on the user's computer?

Christian Graus28-Apr-08 11:29