Programming Forums > Application Development > C#

King · Aug 27th, 2006, 5:13 PM

Well you declared 'sw' in your contractor, so your button click event won’t see it because it’s out of scope. Declare it above your constructor and make it private.

crawforddavid2006 · Aug 27th, 2006, 5:36 PM

ok i tried this
[php]
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using System.IO;

namespace IOTest
{
public partial class MainForm
{
//[STAThread]
/*FileStream file = new FileStream("c:\test.txt", FileMode.CreateNew, FileAccess.ReadWrite);
StreamWriter sw = new StreamWriter("c:\test.txt");*/
private FileStream file = new FileStream("c:\test.txt", FileMode.CreateNew, FileAccess.ReadWrite);
private StreamWriter sw = new StreamWriter("c:\test.txt");
public static void Main(string[] args)
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new MainForm());
}

public MainForm()
{
InitializeComponent();
/*FileStream file = new FileStream("c:\test.txt", FileMode.CreateNew, FileAccess.ReadWrite);
StreamWriter sw = new StreamWriter(file);*/

}

void MainFormLoad(object sender, System.EventArgs e)
{

}

void Button1Click(object sender, System.EventArgs e)
{
sw.Write("Hello World");
}
}
}

[/php]

and got this error

(Toggle Plain Text)

Exception System.ArgumentException was thrown in debuggee:
Illegal characters in path.

CheckInvalidPathChars()
GetFileName()
.ctor()
.ctor() - c:\Documents and Settings\David\My Documents\SharpDevelop Projects\IOTest\IOTest\MainForm.cs:14,3
Main() - c:\Documents and Settings\David\My Documents\SharpDevelop Projects\IOTest\IOTest\MainForm.cs:20,4

I'm feeling really lost

AntiNinja · Aug 27th, 2006, 7:19 PM

try "C:\\test.txt"

I'm not sure though I dont use C#, but in Java you have to do that for backslashes.

King · Aug 27th, 2006, 8:23 PM

AntiNinja is correct, you need the double backslash for it to work.

crawforddavid2006 · Aug 28th, 2006, 12:26 AM

Oh yeah... i forgot about escape characters

crawforddavid2006 · Aug 28th, 2006, 12:31 AM

All right i tried what you suggested and got the same exact error. I can't see what i'm doing wrong.

crawforddavid2006 · Aug 28th, 2006, 12:32 AM

Never mind i forgot something. I think i got it now

crawforddavid2006 · Aug 28th, 2006, 12:34 AM

Ok it does not give me the same error... in fact it doesnt give me any error but It does not appear in the document... I'm sorry if i am asking to many questions but it just seems like i'm not getting anywhere with this lately.

AntiNinja · Aug 28th, 2006, 12:36 AM

try private StreamWriter sw = new StreamWriter(file); as thats what they have in the tutorial, but again no C# experience sorry

Booooze · Aug 28th, 2006, 12:39 AM

Maybe try closing the file?

(Toggle Plain Text)

sw.Close()

Try that, then view it.

[EDIT] That should do it, I'm just looking at some of my code now, and it should work for you. Also, check out the dispose method.

Aug 27th, 2006, 5:13 PM	#11
King Professional Programmer Join Date: Jan 2006 Location: Ontario, Canada Posts: 377 Rep Power: 0	Well you declared 'sw' in your contractor, so your button click event won’t see it because it’s out of scope. Declare it above your constructor and make it private. __________________ I am Addicted to Linux!

Aug 27th, 2006, 7:19 PM	#13
AntiNinja Hobbyist Programmer Join Date: Jun 2006 Location: The States Posts: 101 Rep Power: 3	try "C:\\test.txt" I'm not sure though I dont use C#, but in Java you have to do that for backslashes. __________________ Pain is just weakness leaving the body.

Aug 27th, 2006, 8:23 PM	#14
King Professional Programmer Join Date: Jan 2006 Location: Ontario, Canada Posts: 377 Rep Power: 0	AntiNinja is correct, you need the double backslash for it to work. __________________ I am Addicted to Linux!

Aug 28th, 2006, 12:36 AM	#19
AntiNinja Hobbyist Programmer Join Date: Jun 2006 Location: The States Posts: 101 Rep Power: 3	try private StreamWriter sw = new StreamWriter(file); as thats what they have in the tutorial, but again no C# experience sorry __________________ Pain is just weakness leaving the body.

Aug 28th, 2006, 12:39 AM	#20
Booooze Expert Programmer Join Date: Mar 2006 Location: Igloo Posts: 710 Rep Power: 3	Maybe try closing the file? (Toggle Plain Text) sw.Close() sw.Close() Try that, then view it. [EDIT] That should do it, I'm just looking at some of my code now, and it should work for you. Also, check out the dispose method.

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Programming Forums > Application Development > C#

Storing Data from a C# program into a text file