How do i properly update information in a text file?

Question

I want to save some data in a text file like this:

Name = Frank
Age = 28
Registered = False

Now i want to read/update the Data contained in each row. For example I need to change the Name to "Tim", I have to find row Name and than replace the string after the "="

Im not quiet sure how to solve this properly and i couldnt find anything on Google that satisfied me

I tried to update it with the text.Replace() method but it only chances the string it actually finds.

I expect to read the correct data out of the row and replace it if needed

Answer 1

There are a wide variety of ways to do this. I'll contribute one of them (which I think is simpler to understand).

Step 1: Read the entire file into a string.

Step 2: Convert it to string.

Step 3: Process the string using simple methods like split and join.

Step 4: Overwrite the previous file with the processed string.

The code is below:

if (File.Exists(your_file_path)){
    string yourfile = File.ReadAllText(your_file_path);

    // Now the file is a simple string that you can manipulate using
    // string split functions.
    // For Example:

    // break by lines
    string[] lines = yourfile.Split('\n');
    foreach (string line in lines){
        if (line.Substring(0,4) == "Name"){
            // replace the necessary line
            line = "Name = Tim";
            break;
        }
    }

    // Join the array again
    yourfile = lines.Join("\n", lines);
    File.WriteAllText(your_file_path, yourfile);
}