How to move cursor for items in List in console C#?

Question

I'd appreciate of someone could help to find a mistake. I printed items of my List in console and i need to move my cursor down, for each item to be highlighted, I've tried like this:

foreach (FileSystemInfo fsi in files)
         Console.WriteLine(fsi); //printing the "files" list

Console.SetCursorPosition(0, 0); //setting initial place of cursor
while (Console.ReadKey(true).Key != ConsoleKey.Escape)  //untill i press escape
{
    switch (Console.ReadKey(true).Key)
    {
        case ConsoleKey.DownArrow:   //for Down key
            foreach (FileSystemInfo fsi in files)
            {
                Console.BackgroundColor = ConsoleColor.Blue;
                Console.ForegroundColor = ConsoleColor.Green;

                // Here's the problem, the cursor goes to the end of the list, 
                // not moving through each item:
                Console.SetCursorPosition(0, files.IndexOf(fsi)); 

            }
            break;
    }
}
Console.ReadKey();

I'd be grateful for any help! Thanks in advance!

Answer 1

Sure it goes down the complete list due to the foreach within your case.

I changed your filelist to a list of string for my example

var files = new List<string>()
    {
        "File1", "File2", "File3", "File4",
    };

foreach (var fsi in files)
    Console.WriteLine(fsi); //printing the "files" list

// A counter to save the specific position
int cnt = 0;
Console.SetCursorPosition(0, cnt);//setting initial place of cursor

// Save the pressed key so you dont need to press it twice
ConsoleKey key;
while ((key = Console.ReadKey(true).Key) != ConsoleKey.Escape)  //untill i press escape
{
    switch (key)
    {
        case ConsoleKey.DownArrow:   //for Down key
            cnt++;

            if (cnt >= files.Count)
            {
                cnt = files.Count - 1;
            }

            Console.BackgroundColor = ConsoleColor.Blue;
            Console.ForegroundColor = ConsoleColor.Green;

            // Here's the problem, the cursor goes to the end of the list, 
            // not moving through each item:
            Console.SetCursorPosition(0, cnt);

            break;

        case ConsoleKey.UpArrow:   //for Down key
            cnt--;

            if (cnt < 0)
            {
                cnt = 0;
            }

            Console.BackgroundColor = ConsoleColor.Blue;
            Console.ForegroundColor = ConsoleColor.Green;

            // Here's the problem, the cursor goes to the end of the list, 
            // not moving through each item:
            Console.SetCursorPosition(0, cnt);

            break;

    }
}
Console.ReadKey();

The color coding you are trying to do, does not yet work as you want, but I'm sure, you know how to fix it ;-)