Writing a string to a text file - C#

Question

I'm trying to write a ip and port to a text file from user input. However the code below only saves part of the created string.

The code I use to write:

private void Edit_Config(string data)
{
    if (File.Exists(file_loc))
    {
        using (StreamWriter edFile = new StreamWriter(file_loc, false))
        {
            edFile.WriteLine(data);
        }
    }
    else
    {
        //File not found, creates new config with new data.
        using (FileStream fs = File.Create(file_loc))
        {
            Byte[] bytes = new UTF8Encoding(true).GetBytes(data);
            fs.Write(bytes, 0, bytes.Length);
        }
    }
}

The code I use to call the command

Edit_Config(txt_serverIP.Text + ":" + txt_port.Text);

What I get in return for example if I put '192.168.2.60:8080' I get '192.168.2.6' saved.

                edFile.Close();

Closing the file fixed the issue.

Put a Messagebox in the function to display the data string at the start of the routine. The error may be in the calling routine, not here. — Rob Anthony, Jul 26 '17 at 18:13
Message box returns the correct output I should be getting into the file. — , Jul 26 '17 at 18:31
Does it fail both with a new file and adding to an existing file? — Rob Anthony, Jul 26 '17 at 18:35
The new file also writes in the same fashion of '192.168.2.6', skipping the '0:8080'. — , Jul 26 '17 at 18:41
I was expecting the new file to be the bit which did it but wondered if it adds it incorrectly to an existing file too. — Rob Anthony, Jul 26 '17 at 18:44
Shouldn't you close the file after you've written to it to make sure everything is written? — Rob Anthony, Jul 26 '17 at 19:02

Joel Coehoorn · Answer 1 · 2017-07-26T18:53:11.023

2

As long as your data string is correct, this should handle everything you're doing in that method right now:

private void Edit_Config(string data)
{
    File.AppendAllText(file_loc, data);
}

This should work in embedded framework:

private void Edit_Config(string data)
{
    using (var writer = new StreamWriter(file_loc, true))
    {
       writer.WriteLine(data);
    }
}

edited Jul 26 '17 at 18:53

answered Jul 26 '17 at 18:11

Joel Coehoorn

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AppendAllText doesn't work in the embedded framework sadly – Jul 26 '17 at 18:43
Still gives the same result, oddly. – Jul 26 '17 at 19:09

Writing a string to a text file - C#

1 Answers1