C# LogAMessage class

[SpecialKay]

Hey guys.
I would like to build a class that i can use to log some messages into a textfile for easier web debugging.
so i guess my question is:
How do you direct output of a string into a textfile.

thank you

[Plater]

Look at the System.IO namespace. Thjere is the File, FileInfo, FileStream, StreamWriter(this one in particular probably) and the StreamReader can all help you.

[Frinavale]

Hey guys.
I would like to build a class that i can use to log some messages into a textfile for easier web debugging.
so i guess my question is:
How do you direct output of a string into a textfile.

thank you

Check out the System.IO.File class for information on how to write files.

The example they list in that link is quite easy to follow (I've posted it below)

 string path = @"c:\temp\MyTest.txt";
        if (!File.Exists(path)) 
        {
            // Create a file to write to.
            using (StreamWriter sw = File.CreateText(path)) 
            {
                sw.WriteLine("Hello");
                sw.WriteLine("And");
                sw.WriteLine("Welcome");
            }    
        }
 
        // Open the file to read from.
        using (StreamReader sr = File.OpenText(path)) 
        {
            string s = "";
            while ((s = sr.ReadLine()) != null) 
            {
                Console.WriteLine(s);
            }
        }
 
        try 
        {
            string path2 = path + "temp";
            // Ensure that the target does not exist.
            File.Delete(path2);
 
            // Copy the file.
            File.Copy(path, path2);
            Console.WriteLine("{0} was copied to {1}.", path, path2);
 
            // Delete the newly created file.
            File.Delete(path2);
            Console.WriteLine("{0} was successfully deleted.", path2);
        } 
        catch (Exception e) 
        {
            Console.WriteLine("The process failed: {0}", e.ToString());
        }
    }

-Frinny

[SpecialKay]

very nice, thank you.
However, it is eazy to follow im not quite sure how to modify it to my needs.
I want to append a message to a text file, without creating a new file every time.

is there a way that i could do:

file.open(path);
file.write(message '\n');

[Plater]

very nice, thank you.
However, it is eazy to follow im not quite sure how to modify it to my needs.
I want to append a message to a text file, without creating a new file every time.

is there a way that i could do:

file.open(path);
file.write(message '\n');

Look at the overloads to File.Open(), there are some choices there for append and such.

[SpecialKay]

do you know what the options are for FileMode?

[SpecialKay]

never mind, stupid question.
Do i need to make a FileStream? what is that?
or should i be able to just file.open?

it also seems like it only wants to accept a byte[]. If i have a simple string, how do i change that?

[Plater]

You can create a StreamWriter with a FileStream.
StreamWriter's constructor can take in a stream (FileStream is a stream) so you can use a StreamWriter instead.

[SpecialKay]

Thank you, for your help.
Im still lost, but let me play around for a little bit. I will post another question in due time

[SpecialKay]

if you could give me some code to try that would be great, lets say i have a string message = "I like Cheese";

and i want to have a class, with a function that will send that string to a text file. My code so far (Not working):

public class LogAMessage
{
    string path = @"\\server\test.txt";
    public LogAMessage()
    {
        //
        // TODO: Add constructor logic here
        //
    }
    public static void logAMessage(string message)
    {
        try
        {
            FileStream s2 = new FileStream(path, FileMode.Append, FileAccess.Write);
            s2.Write(message, 0, message.Length);
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }
 

[Plater]

Need an extra little step

public static void logAMessage(string message)
    {
        try
        {
            FileStream s2 = new FileStream(path, FileMode.Append, FileAccess.Write);
            StreamWriter sw = new StreamWriter(s2);
            sw.Write(message);
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }
 

[SpecialKay]

logfile.txt gets created, but is empty

    public static void logAMessage(string message)
    {
        string path = "c:\\logfile.txt";
        try
        {
            FileStream s2 = new FileStream(path, FileMode.Append);
            StreamWriter sw = new StreamWriter(s2);
            sw.Write(DateTime.Now);
            sw.Write(" :: ");
            sw.Write(message);
        }
        catch (Exception ex)
        {
            throw ex;
        }