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Write string to text file C#

Hello,

I have a long text string and I need to save it to text file.
I have "Save" button and string. How to do it? How to open a file a nd write to it? I never worked with files.

THANKS
0
margarit
Asked:
margarit
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2 Solutions
 
CebikCommented:
StreamWriter str = new StreamWriter("c:\test.txt");
str.WriteLine(yourstring);
str.Close();
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CuteBugCommented:
You can call File.WriteAll() method.


using System.IO;
 
string str = "Data to write";
File.WriteAll(@"C:\Temp\MyFile.txt", str);

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Pearl_export_benCommented:
Modify this script so that when your user clicks save, the WriteToFile Function is called.  aRandomVariableContainingMoreText (Below) can be replaced by the contents of wherever your users are typing like SW.WriteLine(Text1.text) or similar


    StreamWriter SW;
    SW=File.CreateText("c:\\MyTextFile.txt");
    SW.WriteLine("This is your first line of text");
    SW.WriteLine(aRandomVariableContainingMoreText);
    SW.Close();

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Pearl_export_benCommented:
PS, a good source for working with text files in C# is:

http://www.csharphelp.com/archives/archive24.html

I used it when i learned and I would recommend it to anyone :)

Ben
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margaritAuthor Commented:
Hello,
Thanks for all the fast answers!!!
If my string contains "\n" - new line. Would it go to a new line in a text file. If not how to do it?
 
THANKS
0
 
CuteBugCommented:
You need to split the string into an array of strings.

            string testString = "This\nis\njust\na\ntest\nof\nmultiple\nlines.";
            string[] lines = testString.Split(new char[] { '\n' });
            File.WriteAllLines(@"C:\Temp\testFile.txt", lines);

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CebikCommented:
i don't think so..
if you want only add something to file then:

and..
WOW how many fast answers :)

StreamWriter sw = new StreamWriter(@"C:\test.txt", true)
sw.Write(yourString);
sw.WriteLine(yourString2);

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margaritAuthor Commented:
Hello!
THANKS AGAIN!!!
I use the following method to write to file:
StreamWriter sw = new StreamWriter(@"C:\test2.txt", true);
The problem that if the file test2 already exists it does not rewrite it. It append my text to already existed text in the file.
How can I delete the text in file? Or re-create the file?
THANKS
0
 
CebikCommented:
try
StreamWriter sw = new StreamWriter(@"C:\test2.tx
t", false);
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CuteBugCommented:
You need to use FileStream class for that

FileStream fs = new FileStream(@"C:\test2.txt", FileMode.CreateNew, FileAccess.Write, FileShare.Read);
StreamWriter sw = new StreamWriter(fs);

This will recreate the file.
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CuteBugCommented:
Oops!
Just a small typo. It should be FileMode.Create instead of FileMode.CreateNew.
FileStream fs = new FileStream(@"C:\test2.txt", FileMode.Create, FileAccess.Write, FileShare.Read);
StreamWriter sw = new StreamWriter(fs); 

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margaritAuthor Commented:
Hello!
THANKS AGAIN!!!
I tried StreamWriter sw = new StreamWriter(@"C:\test2.tx
t", false);

and it works fine
THANKS A LOT!!!!
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CebikCommented:
but this one create new or/and recreate file (checked)
StreamWriter sw = new StreamWriter(@"C:\test2.txt", false);

but i think CuteBug found beter solution:
and its creating new file and rewriting also

File.WriteAllText(@"c:\s.txt", yourString);

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margaritAuthor Commented:
THANKS A LOT!!! YOU HELPED ME A  LOT
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CebikCommented:
@margarit

my pleasure! :)
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