Question

I have recently integrated in a HUD method into my XNA game project and when the method is called by the main Draw method it throws out a object disposed exception this has something to do with the two Drawstring used in the program.

The exception is thrown at spriteBatch.End() and says Cannot access a disposed object.
Object name: ‘Texture2D’.

      //initiation of the spritebatch 
     private SpriteBatch spriteBatch;

    //game draw method
    public override void Draw(GameTime gameTime)
            {
                ScreenManager.GraphicsDevice.Clear(Color.CornflowerBlue);

                // Our player and enemy are both actually just text strings.
                spriteBatch = ScreenManager.SpriteBatch;

                tileMap.Draw(spriteBatch, camera);

                spriteBatch.Begin(SpriteSortMode.Deferred,
                     BlendState.AlphaBlend,
                     null, null, null, null,
                     camera.TransformMatrix);

                DrawHud();

                level.Draw(gameTime, spriteBatch);

                spriteBatch.End();

                // If the game is transitioning on or off, fade it out to black.
                if (TransitionPosition > 0 || pauseAlpha > 0)
                {
                    float alpha = MathHelper.Lerp(1f - TransitionAlpha, 1f, pauseAlpha / 2);

                    ScreenManager.FadeBackBufferToBlack(alpha);
                }

                base.Draw(gameTime);
            }

the HUD method
 private void DrawHud()
        {
            Rectangle titleSafeArea = ScreenManager.GraphicsDevice.Viewport.TitleSafeArea;
            Vector2 hudLocation = new Vector2(titleSafeArea.X + camera.Position.X, titleSafeArea.Y + camera.Position.Y);
            Vector2 center = new Vector2(titleSafeArea.Width + camera.Position.X  / 2.0f,
                                         titleSafeArea.Height + camera.Position.Y / 2.0f);

            // Draw time remaining. Uses modulo division to cause blinking when the
            // player is running out of time.
            string timeString = "TIME: " + level.TimeRemaining.Minutes.ToString("00") + ":" + level.TimeRemaining.Seconds.ToString("00");
            Color timeColor;
            if (level.TimeRemaining > WarningTime ||
                level.ReachedExit ||
                (int)level.TimeRemaining.TotalSeconds % 2 == 0)
            {
                timeColor = Color.Yellow;
            }
            else
            {
                timeColor = Color.Red;
            }
            DrawShadowedString(hudFont, timeString, hudLocation, timeColor);

            // Draw score
            float timeHeight = hudFont.MeasureString(timeString).Y;
            DrawShadowedString(hudFont, "SCORE: " + level.Score.ToString(), hudLocation + new Vector2(0.0f, timeHeight * 1.2f), Color.Yellow);

        }
        //method which draws the score and the time (and is causing the problem)
        private void DrawShadowedString(SpriteFont font, string value, Vector2 position, Color color)
        {
            spriteBatch.DrawString(font, value, position + new Vector2(1.0f, 1.0f), Color.Black);
            spriteBatch.DrawString(font, value, position, color);
        }

Answer 1

My guess is that something is happening in level.Draw that is disposing of a texture somewhere. It doesn’t look like the drawhud method in particular is responsible

You mention though that you are sure it’s caused by the drawstring methods … if you comment those two out in particular does the error go away?