Game State being skipped

Question

One of my game states is being skipped (pressing space goes straight to the 'GameScreen' game state skipping the 'CharSelect' state). All help is appreciated.

        if (currentGameState == GameState.TitleScreen)
        {
            if (keyboard.IsKeyDown(Keys.Space))
            {
                currentGameState = GameState.CharacterSelect;
                testFontTitle = "CharSelect";
                changedstate = true;
            }

            if (keyboard.IsKeyDown(Keys.Escape))
            {
                this.Exit();
            }
        }

        else if (currentGameState == GameState.CharacterSelect)
        {
            if (keyboard.IsKeyDown(Keys.Space))
            {
                currentGameState = GameState.GameScreen;
                testFontTitle = "GameScreen";
                changedstate = true;
            }

            if (keyboard.IsKeyDown(Keys.Escape))
            {
                currentGameState = GameState.TitleScreen;
                testFontTitle = "Title";
                changedstate = true;
            }
        }

        // TODO: Add your update logic here
        base.Update(gameTime);
    }

Answer 1

It is probably due to your gameloop is faster then your pressing speed. You should stop detecting space key when you pressed it once. For checking purpose you can use a flag for now. Like,

bool _isKeyPressed = false;
if (currentGameState == GameState.TitleScreen && !_isKeyPressed)
    {
        if (keyboard.IsKeyDown(Keys.Space))
        {
            currentGameState = GameState.CharacterSelect;
            testFontTitle = "CharSelect";
            changedstate = true;
            _isKeyPressed = true;
        }

        if (keyboard.IsKeyDown(Keys.Escape))
        {
            this.Exit();
        }
    }

    else if (currentGameState == GameState.CharacterSelect && !_isKeyPressed)
    {
        if (keyboard.IsKeyDown(Keys.Space))
        {
            currentGameState = GameState.GameScreen;
            testFontTitle = "GameScreen";
            changedstate = true;
            _isKeyPressed = true;
        }

        if (keyboard.IsKeyDown(Keys.Escape))
        {
            currentGameState = GameState.TitleScreen;
            testFontTitle = "Title";
            changedstate = true;
        }
    }

    if (keyboard.IsKeyUp(Keys.Space))
        _isKeyPressed = false;

    // TODO: Add your update logic here
    base.Update(gameTime);
}

If you have to check more than just the spacebar to check, you may replace the flag with a 'old' and 'new' keyboard state mechanism like so:

    Keyboardstate _oldKBstate;

    protected override void Initialize()
    {
        _oldKBstate = Keyboard.GetState(); // Make sure it is initialized!

        // ...
    }

    protected override void Update(GameTime gameTime)
    {
         Keyboardstate newKBstate = Keyboard.GetState();

         // ....

         if(_oldKBstate.IsKeyDown(Keys.A) && newKBstate.IsKeyUp(Keys.A))
         {
               // On A key press.
         }

         if(_oldKBstate.IsKeyUp(Keys.A) && newKBstate.IsKeyDown(Keys.A))
         {
               // On A key release.
         }

         _oldKBstate = newKBstate; // remember the new state.
    }