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POA Null Reference Exception
 

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plurals
  1. POA Null Reference Exception
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    <p>"Object reference not set to an instance of an object."</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Content; using Microsoft.Xna.Framework.Graphics; namespace XNAdev { class Sprite { //The size of the Sprite public Rectangle Size; //Used to size the Sprite up or down from the original image public float Scale = 1.0f; //The current position of the Sprite public Vector2 Position = new Vector2(115, 0); //The texture object used when drawing the sprite private Texture2D mSpriteTexture; //Load the texture for the sprite using the Content Pipeline public void LoadContent(ContentManager theContentManager, string theAssetName) { mSpriteTexture = theContentManager.Load&lt;Texture2D&gt;(theAssetName); Size = new Rectangle(0, 0, (int)(mSpriteTexture.Width * Scale), (int)(mSpriteTexture.Height * Scale)); } //Draw the sprite to the screen public void Draw(SpriteBatch theSpriteBatch) { theSpriteBatch.Draw(mSpriteTexture, Position, new Rectangle(0, 0, mSpriteTexture.Width, mSpriteTexture.Height), Color.White, 0.0f, Vector2.Zero, Scale, SpriteEffects.None, 0); } } } </code></pre> <p>I am very new at this C# so any help would be great.</p> <p>I have no idea what my error is.</p> <hr> <pre><code>namespace XNAdev { public class Game1 : Microsoft.Xna.Framework.Game { GraphicsDeviceManager graphics; SpriteBatch spriteBatch; Sprite mSprite; Sprite mSpriteTwo; Sprite mBackgroundOne; Sprite mBackgroundTwo; Sprite mBackgroundThree; Sprite mBackgroundFour; Sprite mBackgroundFive; public Game1() { graphics = new GraphicsDeviceManager(this); Content.RootDirectory = "Content"; } protected override void Initialize() { mSprite = new Sprite(); mSpriteTwo = new Sprite(); mBackgroundOne = new Sprite(); mBackgroundOne.Scale = 2.0f; mBackgroundTwo = new Sprite(); mBackgroundTwo.Scale = 2.0f; mBackgroundThree = new Sprite(); mBackgroundThree.Scale = 2.0f; mBackgroundFour = new Sprite(); mBackgroundFour.Scale = 2.0f; mBackgroundFive = new Sprite(); mBackgroundFive.Scale = 2.0f; base.Initialize(); } protected override void LoadContent() { spriteBatch = new SpriteBatch(GraphicsDevice); mSprite.Position = new Vector2(125, 245); mSpriteTwo.LoadContent(this.Content, "SquareGuy"); mSpriteTwo.Position.X = 300; mSpriteTwo.Position.Y = 300; mBackgroundOne.LoadContent(this.Content, "Background01"); mBackgroundOne.Position = new Vector2(0, 0); mBackgroundTwo.LoadContent(this.Content, "Background02"); mBackgroundTwo.Position = new Vector2(mBackgroundOne.Position.X + mBackgroundOne.Size.Width, 0); mBackgroundThree.LoadContent(this.Content, "Background03"); mBackgroundThree.Position = new Vector2(mBackgroundTwo.Position.X + mBackgroundTwo.Size.Width, 0); mBackgroundFour.LoadContent(this.Content, "Background04"); mBackgroundFour.Position = new Vector2(mBackgroundThree.Position.X + mBackgroundThree.Size.Width, 0); mBackgroundFive.LoadContent(this.Content, "Background05"); mBackgroundFive.Position = new Vector2(mBackgroundFour.Position.X + mBackgroundFour.Size.Width, 0); } protected override void UnloadContent() { } protected override void Update(GameTime gameTime) { // Allows the game to exit if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed) this.Exit(); if (mBackgroundOne.Position.X &lt; -mBackgroundOne.Size.Width) { mBackgroundOne.Position.X = mBackgroundFive.Position.X + mBackgroundFive.Size.Width; } if (mBackgroundTwo.Position.X &lt; -mBackgroundTwo.Size.Width) { mBackgroundTwo.Position.X = mBackgroundOne.Position.X + mBackgroundOne.Size.Width; } if (mBackgroundThree.Position.X &lt; -mBackgroundThree.Size.Width) { mBackgroundThree.Position.X = mBackgroundTwo.Position.X + mBackgroundTwo.Size.Width; } if (mBackgroundFour.Position.X &lt; -mBackgroundFour.Size.Width) { mBackgroundFour.Position.X = mBackgroundThree.Position.X + mBackgroundThree.Size.Width; } if (mBackgroundFive.Position.X &lt; -mBackgroundFive.Size.Width) { mBackgroundFive.Position.X = mBackgroundFour.Position.X + mBackgroundFour.Size.Width; } Vector2 aDirection = new Vector2(-1, 0); Vector2 aSpeed = new Vector2(160, 0); mBackgroundOne.Position += aDirection * aSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds; mBackgroundTwo.Position += aDirection * aSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds; mBackgroundThree.Position += aDirection * aSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds; mBackgroundFour.Position += aDirection * aSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds; mBackgroundFive.Position += aDirection * aSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds; } protected override void Draw(GameTime gameTime) { graphics.GraphicsDevice.Clear(Color.CornflowerBlue); spriteBatch.Begin(); mBackgroundOne.Draw(this.spriteBatch); mBackgroundTwo.Draw(this.spriteBatch); mBackgroundThree.Draw(this.spriteBatch); mBackgroundFour.Draw(this.spriteBatch); mBackgroundFive.Draw(this.spriteBatch); mSprite.Draw(this.spriteBatch); mSpriteTwo.Draw(this.spriteBatch); spriteBatch.End(); base.Draw(gameTime); } } } </code></pre> <p>Thats the rest of the code</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USHenk Holterman
    1. USAlex
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COAnd where does it happen?
      singulars
      1. POA Null Reference Exception
      1. USFemaref
    2. COAnd we have no idea _where_ the error is.
      singulars
      1. POA Null Reference Exception
      1. USHenk Holterman
    3. CONull reference happens when you use a variable which is not initialized. So this error must be inside loadcontent or draw method.
      singulars
      1. POA Null Reference Exception
      1. USAseem Gautam
 

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