I was able to get this code to work in a console application but I am currently working in a windows form. I changed the output to console application but this still did not work.
string path = @"C:\Users\rbc658\Trajectory.txt";
if (!File.Exists(path))
{
File.Create(path);
TextWriter txt = new StreamWriter(path);
txt.WriteLine("Hello");
txt.Close();
}
else if (File.Exists(path))
{
using (var txt = new StreamWriter(path, true))
{
txt.WriteLine("Hello");
txt.Close();
}
}
"Close" "Create" and "WriteLine" are not highlighted like they are in the above text. I am using system.io. What is different about forms and console application that would prevent this from working?
It is more elegant for you to create a function to call to write something to a text file, like this
This code below worked for me:
private void Form1_Load(object sender, EventArgs e) // for example run this code when form loads
{
string path = @"C:\Users\Luka\Desktop\Trajectory.txt"; // your path to a text file
string text = "Hello"; // some text to write to a text file
Write(text, path, File.Exists(path)); // we are passing File.Exists(path) as a boolean to see wether or not to append text to a file
}
private void Write(string text, string path, bool file_exists)
{
//if File.Exists(path) is true, streamwriters second argument is true, so it appends
//else the argument is false and it does not append
StreamWriter txt = new StreamWriter(path, file_exists); // creates new object type StreamWriter with 2 arguments
//1. path to a file
//2. boolean to see wether or not to append the text to a file
txt.WriteLine(text); // writes text line to a file
txt.Dispose(); // disposes streamwriter
}
All explanation is displayed as comments in the code so you can copy it when testing the program.
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