Streamwriter only writes one item from textbox

auting82

I am trying to create a function in the GUI where I Logg the values from a textbox and then allow the user to save these values as a .csv file anywhere on the computer. I have managed to do that, but when I open the files I only see one item from my textbox written in the text file, Why is that ?

private void Logging()
{
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
using (Stream s = File.Open(saveFileDialog1.FileName, FileMode.CreateNew))
using (StreamWriter sw = new StreamWriter(s))
{

                sw.WriteLine(textSampling.Text);
                
            }
               
        }

Lost User

You are using File.Open(saveFileDialog1.FileName, FileMode.CreateNew) every time, so the file will only ever contain that last item logged. You need to use FileMode.Append as described at FileMode Enumeration (System.IO)[^].

Lost User

For "simple" logging, all you need is: 1) File.AppendAllText, or 2) File.AppendAllLines

"(I) am amazed to see myself here rather than there ... now rather than then". ― Blaise Pascal

auting82

Hi, how am I suppose to implement it with my code. i have code that is doing almost everything I want, only not printing the contents from the text.Box. The strange thing is, when I use a RichTextBox then everything gets printed into the .csv file I am trying to create. :^) Were you thinking about something like this?

private void Logging()
{

        SaveFileDialog saveFileDialog1 = new SaveFileDialog();
        if (saveFileDialog1.ShowDialog() == DialogResult.OK)
        {
            using (Stream s = File.Open(saveFileDialog1.FileName, FileMode.CreateNew | FileMode.Append))
            using (StreamWriter sw = new StreamWriter(s))
            {
                
                sw.WriteLine(textSampling.Text);
                
            }
               

        }

Lost User

I already explained, that if you use FileMode.CreateNew you will be creating a new file every time you try to write a log entry. You only need to use that once, at the beginning of a session perhaps*, and use FileMode.Append for every subsequent call. * You need to use some sort of file name cycling in your programs so you do not overwrite the previously created files. A common method of doing this is to create files with the date as part of the filename.

auting82

Itried that but it didnt work :(

Lost User

What is "it"? If it didn't work, you did "it" wrong.

"(I) am amazed to see myself here rather than there ... now rather than then". ― Blaise Pascal

auting82

Yes you are completely correct . I did something very WRONG. Holy Shit , I was writing from wrong text box the whole time. :sigh: X| My initial code actually works;

SaveFileDialog saveFileDialog1 = new SaveFileDialog();
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
using (Stream s = File.Open(saveFileDialog1.FileName,FileMode.CreateNew))
using (StreamWriter sw = new StreamWriter(s))
{

                    sw.WriteLine(textSensorValues.Text);

                }


            }

Lost User

Been there, done that. One "relaxes" AFTER the problem is solved; not before.

"(I) am amazed to see myself here rather than there ... now rather than then". ― Blaise Pascal